EVAL-ADAS1000SDZ User Guide UG-426

EVAL-ADAS1000SDZ User Guide UG-426
EVAL-ADAS1000SDZ User Guide
UG-426
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the ADAS1000 ECG Front-End
for Demonstration and Development
FEATURES
GENERAL DESCRIPTION
Biopotential signals in; digitized signals out
6 electrodes (5 acquisition channels and 1 driven lead)
2 × ADAS1000 (master/slave) for 1 to 12 lead electrode
measurements
AC and DC lead-off detection
Pace detection
Optional thoracic impedance measurement
(internal/external)
Selectable reference lead
Lead or electrode data available
Calibration features (DAC and 1 mV square/sinewave)
Low or high speed data output rates
Serial interface SPI®-/QSPI™-/DSP-compatible
The primary function of the EVAL-ADAS1000SDZ evaluation
board is to demonstrate the ADAS1000 integrated ECG device
for medical instrumentation. A full description of the ADAS1000
is available in the data sheet and should be consulted when
utilizing this user guide. This evaluation board is used to
evaluation the ADAS1000 and all variants.
CUSTOMER INTERFACING OPTIONS
Direct access to ADAS1000 serial interface (J4)
USB interface via Analog Devices, Inc., Blackfin®-based
SDP-B controller board and GUI
APPLICATIONS
ECG
Patient monitor
Holter monitor
Cardiac defibrillators
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
The evaluation board is ideal for exploring concepts and
adopting the ADAS1000 into advanced medical systems.
The board can be operated as part of an end user’s system via
the ADAS1000 SPI interface or as a standalone evaluation of
the ADAS1000 using the support of the Analog Devices system
demonstration platform controller board (SDP-B), and a
standard PC (running Windows® XP, Windows® Vista or
Windows® 7 32-bit and 64-bit) to run the Analog Devices
evaluation software.
The SDP-B board, which is a DSP-based controller board is
separate from the evaluation board, is required to run the
Analog Devices evaluation software and is used for data transfer
from evaluation board to PC via USB interface. It does not
come as part of the evaluation kit and can be ordered separately
(EVAL-SDP-CB1Z). It can be reused with many other Analog
Devices evaluation modules.
For more information, visit the Analog Devices healthcare
home page.
Rev. A | Page 1 of 44
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EVAL-ADAS1000SDZ User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Quick Operation of ADAS1000 Software ............................... 10
Customer Interfacing Options ........................................................ 1
Detailed Description of Main Control Panel.......................... 10
Applications ....................................................................................... 1
Control of all Registers .............................................................. 12
General Description ......................................................................... 1
ECG Capture ............................................................................... 14
Revision History ............................................................................... 2
ECG Capture with Digital Post Processing............................. 15
Conditions Regarding the Use of This Product in
Healthcare Applications............................................................... 3
Leads OFF Control ..................................................................... 16
Evaluation Kit Contents............................................................... 3
Pace .............................................................................................. 18
Hardware Requirements .............................................................. 3
Understanding Pace in the ADAS1000 ................................... 19
Evalution Board Software ................................................................ 5
Write to a File .............................................................................. 20
Installing the Software: Overview .............................................. 5
Test Tones .................................................................................... 23
Installing the Software: Details ................................................... 5
Common-Model Level/Wilson Central Terminal ................. 25
Connecting to the Board ............................................................. 6
Detailed Description ...................................................................... 26
Running the Software .................................................................. 6
Overview of Schematics ............................................................ 26
Evaluation Board Hardware ............................................................ 7
Pace Interface (Optional) .......................................................... 26
Key Features .................................................................................. 7
Power............................................................................................ 26
Connectors .................................................................................... 7
Flexible Respiration Feature on Master ADAS1000 .............. 27
Connecting an ECG Signal ......................................................... 8
Troubleshooting.......................................................................... 33
RESET Buttons .............................................................................. 8
Clamp ........................................................................................... 34
LED................................................................................................. 8
Evaluation Board Schematics........................................................ 35
Respiration .................................................................................. 17
Jumpers .......................................................................................... 9
ADAS1000 Software Operation .................................................... 10
REVISION HISTORY
3/14—Rev. 0 to Rev. A
Changed ADAS1000SDZ to EVAL-ADAS1000 SDZ
Throughout ......................................................................... Universal
Change to Title .................................................................................. 1
Changes to Figure 46 ...................................................................... 35
Changes to Figure 52 ...................................................................... 41
Changes to Figure 53 ....................................................................... 42
8/12—Revision 0: Initial Version
Rev. A | Page 2 of 44
EVAL-ADAS1000SDZ User Guide
UG-426
WALL POWER, BENCH SUPPLY OR BATTERY (J7 OR J9)
4.5V TO 5.5V
CIRCUIT/LINK AREA
FOR ENHANCED
RESPIRATION
GND
ON BOARD REGULATOR AND LDOS
AVDD: 3.3V
IOVDD: 3.3V
INPUT
RC COMPONENT SPACE
FOR CABLE MODEL, FILTER MODEL
ADAS1000
RESET
OPTIONAL
HEADER CONNECTOR
FOR RESPIRATION (EXT)
(J8)
EXT_RESP_RA
EXT_RESP_LA
EXT_RESP_LL
ADAS1000
MASTER
RA, LA, LL, V1, V2, RLD
RLD
ECG1 (LA)
ECG 2 (LL)
ECG 3 (RA)
ECG 4 (V1)
ECG 5 (V2)
ADAS1000 DIRECT
MASTER INTERFACE
FOR FAST
PACE CONNECTOR
(OPTIONAL)
(J6)
CRYSTAL
DB15 CONNECTOR
FOR ECG
(J1)
ADJUSTABLE RLD
GAIN SETTING
COMPONENTS
ECG 6 (V3)
ECG 7 (V4)
ECG 10 (SPARE)
ADAS1000 DIRECT
SPI CONNECTOR
(OPTIONAL)
(J4)
SDP
RESET
SDP CONNECTOR
10810-001
ADAS1000
SLAVE
V3, V4, V5, V6, SPARE
ECG 8 (V5)
ECG 9 (V6)
Figure 1. Functional Block Diagram
CONDITIONS REGARDING THE USE OF THIS
PRODUCT IN HEALTHCARE APPLICATIONS
In addition to the terms found at the end of this document, the
following shall also apply to your use of the board and design:
This evaluation board design is being provided “as is” without any
express or implied representations or warranties of any kind and
the use of this board or design shall impose no legal obligation on
Analog Devices, Inc., and its subsidiaries, employees, directors,
officers, servants and agents. In addition, it is understood and
agreed to that the evaluation board or design is not authorized for
use in safety critical healthcare applications (such as life support)
where malfunction or failure of a product can be expected to result
in personal injury or death. This board must not be used for
diagnostic purposes and must not be connected to a human being
or animal. It must not be used with a defibrillator or other equipment that produces high voltages in excess of the supply rails on
the board.
This evaluation board is provided for evaluation and development purposes only. It is not intended for use or as part of an
end product. Any use of the evaluation board or design in such
applications is at your own risk and you shall fully indemnify
Analog Devices, Inc., its subsidiaries, employees, directors,
officers, servants and agents for all liability and expenses arising
from such unauthorized usage. You are solely responsible for
compliance with all legal and regulatory requirements connected to
such use.
EVALUATION KIT CONTENTS
•
•
•
EVAL-ADAS1000SDZ board
Medical-grade universal ac-to-dc wall adaptor (+5 V)
CD that includes
• Self-installing graphical user interface (GUI) software
that allows users to read/write to ADAS1000 and to
stream data
• Electronic version of the ADAS1000 data sheet
• Electronic version of the EVAL-ADAS1000SDZ
documentation
HARDWARE REQUIREMENTS
•
•
•
Rev. A | Page 3 of 44
Power supply: +5 V (ac-dc adaptor provided)
Patient simulator or similar device
SDP board, a controller board for data transfer to PC. This
can be ordered separately (EVAL-SDP-CB1Z)
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EVAL-ADAS1000SDZ User Guide
POWER
CONNECTOR,
5V (J9)
EXTRA LINKS/CIRCUIT RELATED
TO EXTERNAL RESPIRATION
MEASUREMENTS
OPTIONAL BENCH
SUPPLY FOR ADAS
CHIPS (J6)
ADAS1000
EVALUATION BOARD
OPTIONAL BENCH
SUPPLY (5V)
(J7)
5V WALL
ADAPTOR
EXTERNAL RESPIRATION
CONNECTOR (J8)
ON BOARD
DC-DC
REGULATORS
RESET FOR
ADAS CIRCUIT
ELECTRODE CONNECTOR
DB15 (J1)
SDP BOARD
PATIENT CABLE
ADAS1000 MASTER
ELECTRODES LA, RA, LL, V1, V2, RLD
RLD EXT
COMPONENTS
ADAS1000 SLAVE
ELECTRODES V3,
V4, V5, V6 SPARE
ADAS1000 SPI
INTERFACE(J4)
RESET BUTTON
FOR SDP BOARD
Figure 2. ADAS1000 Evaluation Board/SDP Board
Rev. A | Page 4 of 44
USB
CABLE
TO PC
USB
CONNECTOR
10810-002
SPACE FOR
CABLE/ESIS
MODELLING
EVAL-ADAS1000SDZ User Guide
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EVALUTION BOARD SOFTWARE
INSTALLING THE SOFTWARE: OVERVIEW
The EVAL-ADAS1000SDZ kit includes self-installing software
on CD.
Install the software prior to connecting the SDP board to the USB
port of the PC. This ensures that the SDP board is recognized
when it connects to the PC.
1.
Start the Windows operating system and insert the CD.
2.
The installation software should launch automatically. If it
does not, run the setup.exe file from the CD.
10810-005
INSTALLING THE SOFTWARE: DETAILS
Proceed through the installation steps allowing the software
and drivers to be placed in the appropriate locations. Connect
the SDP board to the PC only after the software and drivers
have been installed.
Figure 5. License Agreement
10810-006
There are two parts to the software installation procedure. The
first part is installing the software related to the ADAS1000
evaluation board as shown in Figure 3.
10810-003
Figure 6. Monitoring Progress
Now, install the software related to the SDP controller board
(see Figure 7).
10810-004
10810-007
Figure 3.Getting Started with the Software Installation
Figure 4. Destination Directory
Rev. A | Page 5 of 44
Figure 7. SDP Software Install
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EVAL-ADAS1000SDZ User Guide
If the SDP board is not connected to the USB port when
the software is launched, a connectivity error is displayed
(see Figure 9). Simply connect the evaluation board to the
USB port of the PC, wait a few seconds, click Rescan, and
follow the instructions that appear.
Plug in the SDP board via the USB cable provided and allow
the new Found Hardware Wizard to run; this detects and loads
drivers for the SDP board. If necessary, check that the drivers
and the board are connected correctly by looking at the Device
Manager of the PC.
10810-008
10810-009
The Device Manager can be found by right clicking on
My Computer > Manage > Device Manager from the list of
System Tools. The SDP board should appear under ADI
Development Tools.
Figure 8. Device Manager
Figure 9. Pop-Up Window Error
2.
When the board is found, click Select.
CONNECTING TO THE BOARD
Follow these steps to power up and start interfacing to the
board using the software:
After installation is completed, plug the EVALADAS1000SDZ into the SDP controller board using J2 of
the ADAS1000 board; use the plastic screws provided on
the ADAS1000 evaluation board to fix the two boards
securely in place.
2.
Power up the evaluation board as described in the
Evaluation Board Hardware section and the Power
Connections section. D10 and LED1should appear lit.
3.
Plug the SDP board into the PC using the USB cable
included in the box.
4.
When the software detects the evaluation board, proceed
through any dialog boxes that appear in order to finalize
the installation.
10810-010
1.
Figure 10. Hardware Selection
The software connects to the board and displays the following:
RUNNING THE SOFTWARE
1.
Select Start > All Programs > Analog Devices >
ADAS1000 > ADAS1000_Software. To uninstall the
program, select Start > Control Panel > Add or Remove
Programs > ADAS1000_Software.
10810-011
Follow these steps to run the program:
Figure 11. Wait Message
Once the board has been correctly detected, the ADAS1000
panel opens (see Figure 13).
Rev. A | Page 6 of 44
EVAL-ADAS1000SDZ User Guide
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EVALUATION BOARD HARDWARE
Table 1. Power Supply Connection (Choose Only One)
KEY FEATURES
•
•
•
•
•
•
•
5 or 10 ECG electrode paths capable of demonstrating
1-lead to 12-leads of ECG data
AC and DC lead off detection
Respiration and pace measurement and display
Calibration features and display
Test tones
Real-time ECG electrode or lead display on PC screen via
Analog Devices ADAS1000 GUI (lead calculation
available).
Recording of ECG data for offline review
Power Connections
AVDD
Supply Range
4.5 V to 5.5 V (may be supplied
from wall adaptor, battery or
bench supply) If applied, this is
the only supply rail required by
the board.
+3 V to +5.5 V
IOVDD
ADCVDD
DVDD
1.65 V to 3.6 V
1.8 V ±5%
1.8 V ±5%
Electrode Connector–J1
This connector provides the primary analog input interface to
which customer proprietary lead sets are connected.
Choose one of the following:
•
Alternative
Supplies (J5)
Parameter
+5 V
CONNECTORS
There are a number of options for supplying power to the
board. The simplest is directly from the J9 dc jack connector
with the wall adapter which is provided as part of the kit.
•
Supply
Requirement
Primary Supply
(J7 or J9)
J9: dc jack–requires 5 V at 250 mA. Note that this provides
power to the SDP board in addition to the ADAS1000
related circuitry.
J7: screw terminal (2 inputs)–requires 5 V at 250 mA.
Provides power to the on-board dc-dc convertors which
supply all circuitry on board and also powers the SDP
board.
•
J5: screw terminal (6 inputs). These inputs are optional
supply inputs for the ADAS1000 devices and the remainder
of the circuitry on the board
• AVDD = 3 V to 5.5 V
• IOVDD = 1.65 V to 3.6 V
• AGND = DGND = 0 V
• ADCVDD and DVDD are optional supplies. They can
be supplied from the ADAS1000 on-chip regulators.
Alternatively, the regulators can be disabled and the
user can drive ADCVDD and DVDD directly via J5. If
ADCVDD and DVDD are driven directly, then the
following supplies are required.
• ADCVDD (optional) = 1.8 V
• DVDD (optional) = 1.8 V
10810-012
Alternatively, choose
Figure 12. J1, DB15 Connector
Connector J1 is a DB15 female connector and mates with a
D-SUB plug. All ADAS1000 electrode connections are made
available here for both master and slave devices in addition
to the Right Leg Drive (RLD_OUT) and Shield Drive
(SHIELD) pins.
Note that every effort was made to supply input protection to
the electrode pins sufficient for the application; however, the
intent was not to offer this module as a true medical solution.
Therefore, no defibrillation pulses or voltages outside the
ADAS1000 operating range should be applied to the input
connector/board.
Rev. A | Page 7 of 44
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EVAL-ADAS1000SDZ User Guide
CONNECTING AN ECG SIGNAL
Table 3. SPI Connector, J4
The user needs to connect a signal source to the evaluation
board connector J1 for measurement purposes. Ideally,
this would be a patient simulator. In demonstrations at Analog
Devices, the PS420 patient simulator (from Fluke Biomedical
Division of Fluke Electronics Corporation) is used.
Pin No.
1
2
3
4
5
6, 12, 13, 14
7
8
9
10
11
Note that the board is not designed for direct connection to
patients or animals for testing.
Users should connect the appropriate signal to the ECG
electrode inputs and RLD_OUT electrode.
Table 2. Electrode Connector, J1
Pin No.
1
2
3
4
5
6
7
8
9
Mnemonic
V2
V3
V4
V5
V6
SHIELD
CE
NC
RA
10
11
12
13
LA
LL
V1
Spare
14
15
RLD
NC
Description
Analog input, Master ECG5_V2
Analog input, Slave ECG1_V3
Analog input, Slave ECG2_V4
Analog input, Slave ECG3_V5
Analog input, Slave ECG4_V6
Output of shield driver
Common electrode, Master CM_IN
Not connected
Analog input, right arm, Master
ECG3_RA
Analog input, left arm, Master ECG1_LA
Analog input, left leg, Master ECG2_LL
Analog input, Master ECG4_V1
Analog input, chest electrode or
auxiliary bio-potential input, Slave ECG5
Right leg drive, RLD_OUT
Not connected
SDP Interface Connector, J2
The purpose of this connector is to facilitate interfacing
with the Analog Devices SDP1Z control board which is USB
controlled. This control board is specific to the operation of this
module as a standalone evaluation and learning platform. This
connector is not intended for customer-specific interfacing.
Main ADAS SPI, J4
This connector provides the ADAS1000 digital interface pins so
that the device may be used in standalone mode (without the
SDP control board). The user may use this connecter to
interface to the device in order to develop their own code and
evaluate the ADAS1000 directly.
Note that on the board, the /CS, SDI, and SDO paths for each
device are separate for ultimate flexibility in control of the
devices. When controlled via the SDP board, the /CS line is
shared (LK12 inserted). When using multiple devices, the
SDI and SDO paths can be shared, and each device can be
controlled via its own /CS line, allowing for easy control with
minimum wires.
Mnemonic
PD
RESET
SDI_1
SDI_0
SDO_1
DGND
SDO_0
CS_0
CS_1
SCLK
DRDY
Device
both
both
slave
master
slave
both
master
master
slave
both
master
Description
Power down, active low
Device reset, active low
Serial data input
Serial data input
Serial data output
Digital ground
Serial data output
Chip select master
Chip select slave
Clock input
Data ready, active low
Timing Characteristics
Refer to the ADAS1000 product data sheet for information
regarding the required waveforms and behavior of the SPI
interface pins when preparing to interface directly to the
ADAS1000 SPI interface.
Pace Interface/GPIO Connector, J6
This connector provides the optional secondary interface
available from the master device for the purposes of the
customer-based digital pace detection algorithm. It is a master
interface providing MSCLK, MSDO, and MCS outputs to be
read by a host controller. It provides ECG data captured at
128 kHz data rate.
Pin No.
1
2
Mnemonic
GPIO3
GPIO2/MSDO
3
GPIO1/MSCK
4
GPIO0/MCS
5, 6
DGND
Description
Reconfigurable IO
Reconfigurable IO/master
interface MSDO
Reconfigurable IO/master
interface MSCK
Reconfigurable IO/master
interface MCS
Digital ground
RESET BUTTONS
There are two reset buttons on the board. SDP reset is used for
a reset of the SDP board and ADAS reset is used for reset of
ADAS1000 devices to default/power-on configuration.
LED
There is one LED (D10) on the board, which is lit when the
board is powered from J7 (+5 V connector).
Rev. A | Page 8 of 44
EVAL-ADAS1000SDZ User Guide
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JUMPERS
There are a number of jumpers included on this board for flexibility and ease of configuration. These jumpers allow the user to easily
drive the main ADAS1000 SPI interface directly without concern about other SPI-controlled components. On receipt of the board, the
jumpers are in the default state as described in Table 4.
Table 4. Default State of Jumpers
Jumper
Respiration
Jumper
LK1
LK2
LK3
LK4
LK19
LK15
LK16
Power Supply
LK6
LK7
LK8
VREG EN
LK9
LK17
LK18
Shield
LK10
Reset Function
Interface
LK11
LK12
LK13
LK14
Description
External Respiration Measurement. LK1 is used to connect the EXT_RESP_XX paths to
the ECG channels external to the device (requires that LK4 be connected if using the
external paths).
External Respiration Measurement. LK2 is used when using external capacitors for the
respiration circuit; LK1 needs to be closed also (and, optionally, LK4).
External Respiration Measurement. LK3 is used to bring either of the ECG channels (LA
or LL) to the input of the AD8226 in-amp (part of an optional respiration circuit).
External Respiration Measurement. LK4 connects the external respiration paths to the
respiration header or, alternatively, to the ECG paths via LK1.
External Respiration Measurement. Connect (A) when using external respiration circuit
(AD8226 and AD8606). Can be disconnected for all other respiration options.
For External Respiration Using an External Instrumentation Amplifier (Optional Circuit).
The evaluation board uses the AD8226 along with a buffer, AD8606. This arrangement
allows the output of the amplifier to drive the EXT_RESP_RA input. Use with LK16.
For External Respiration Using an External Instrumentation Amplifier (Optional Circuit).
The evaluation board uses the AD8226 along with a buffer, AD8606. This arrangement
allows the output of the amplifier to drive the EXT_RESP_LA input. Use with LK15.
AVDD Path from On-Board LDO (ADP151). Open if powering the board from J5 screw
terminals. Closed if supply board from either wall adaptor input or J7 (5 V) supply input.
AVDD Path to MASTER ADAS1000. Use to measure supply current in AVDD path to
MASTER ADAS1000.
IOVDD Path from On-Board LDO (ADP151). Open if powering the board from J5 screw
terminals. Closed if supply board from either wall adaptor input or J7 (5 V) supply input.
VREG_EN–ADAS1000 On-Chip Regulators (DVDD, ADCVDD). They are enabled when
VREG_EN is high, disabled when low, and may be overdriven. If overdriving, close LK9
and use J5 to supply DVDD and ADCVDD supply rails (1.8 V).
ADCVDD net is shared to both MASTER and SLAVE. This allows an external ADCVDD to
be applied. Each ADAS1000 has its own on-chip regulator for ADCVDD. If both MASTER
and SLAVE are inserted on board and LK9 is open, then LK17 should be open.
Each ADAS1000 has its Own On-Chip Regulator for DVDD. If both MASTER and SLAVE
are inserted on board and LK9 is open, then LK18 should be open (to stop the
regulators trying to fight each other).
Link in Shield Path. The Shield pin is a shared pin with the external respiration drive
for LA. Therefore, when using the SHIELD drive directly, the user can connect LK10 to
Link A. Alternatively, if using external respiration feature, the user can connect the
shield of the patient cable directly to GND by inserting LK10 in Position B.
Link in Reset Path.
When using the SDP board, both MASTER and SLAVE are driven with the same CSB
(LK12 inserted).
If driving the MASTER and SLAVE from J4, open LK12.
When using the SDP board, both MASTER and SLAVE drive different SD0 paths (LK13
open).
When using the SDP board, both MASTER and SLAVE are driven with different SDI paths
(LK14 open).
If driving the MASTER and SLAVE from J4 and the same SDI path, close LK14.
Rev. A | Page 9 of 44
Condition
A, B, C inserted
A, B, C inserted
Inserted (A)
Open
Inserted (A)
Closed
Closed
Closed
Closed
Closed
Open
Open
Open
Inserted (B)
Closed
Closed
Open
Open
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EVAL-ADAS1000SDZ User Guide
ADAS1000 SOFTWARE OPERATION
QUICK OPERATION OF ADAS1000 SOFTWARE
1.
2.
3.
Launch the ADAS1000 software. The main panel shown in
Figure 13 opens.
Click Default Settings to power up the ADAS1000,
configuring the device into a known condition.
To start streaming ECG data, go to Stream ECG and a
pop-up window (see Figure 18) opens and the GUI
automatically starts reading ECG data from the board.
DETAILED DESCRIPTION OF MAIN CONTROL
PANEL
the ECGCTL, CMREFCTL, and FRMCTL registers as shown
in Table 5. All other registers remain at their power-on default
settings.
When finished using the software, click QUIT to close the
window.
Table 5. Commands Sent to Master Device by Default
Settings Button
Register
ECGCTL
Word
0xF800BE
CMREFCTL
0xE0000A
FRMCTRL
0x079000
When the software is launched, the main window of the EVALADAS1000SDZ software opens, as shown in Figure 13.
The evaluation board automatically detects if LK12 is inserted,
so it knows if it needs to read from a single device (master,
LK12 = open) or from both devices (master and slave, LK12 =
inserted).
On the main panel, the user can access pop-up windows
which allow access to all register controls, streaming (ECG,
respiration, pace, and lead off), and the write to file window.
The ADAS1000 powers up with channels disabled and in
power-down mode. A number of writes are required to different
registers to start the device up and begin streaming data from
the device.
Within the main window, there is a Default Settings button
which allows quick configuration of the device. This configures
Rev. A | Page 10 of 44
Conditions
All ECG channels enabled.
Single-ended input.
Gain setting, GAIN 0 = 1.4.
VREF buffer enabled.
Low noise/high performance mode.
Convert enabled.
LA, LL, RA are selected to contribute
to VCM.
Reference drive is enabled and
applied to RLD_OUT electrode.
Internal common mode is used and
driven out on CM_OUT.
Shield drive is enabled.
Frame includes: all ECG words, pace
detect, respiration magnitude, leads
off, GPIO, and CRC.
Data format is vector mode.
Every frame is output at frame rate of
2 kHz.
EVAL-ADAS1000SDZ User Guide
UG-426
CHECKS IF MASTER
AND SLAVE DEVICES
ARE PRESENT
ACCESS ALL
REGISTERS
DEFAULT SETTINGS—WHEN
LAUNCHING SOFTWARE—HIT
THIS BUTTON TO POWER UP
THE ADAS1000 INTO KNOWN
CONDITION
EXIT AND
CLOSE GUI
Figure 13. Main Evaluation Board Control Window
Rev. A | Page 11 of 44
10810-013
THESE BUTTONS
OPEN POP-UP
WINDOWS FOR
EACH FUNCTION
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EVAL-ADAS1000SDZ User Guide
CONTROL OF ALL REGISTERS
To delve further into the register control, click Program All RW Reg from the main control panel. This launches a pop-up window giving
access to different tabs for each control register.
When moving back and forth between tabs, note that each time you click on a tab, the device reads the appropriate register and updates
the Read register listing accordingly.
•
•
•
•
•
•
A Write Read Reg writes the data in the write panel and reads back all the registers to confirm the write.
Caution: the write panel may not match the contents of the ADAS1000 registers, so if using this panel to update particular registers,
quickly do a ReSync Write Reg first to ensure that the write and read panels match, and then proceed to make your changes.
Update the register contents with any changes.
Click Default Settings to return the part to the default state.
Save a register setting for reload and reuse later using the Save Reg State and Load Reg State.
When finished with this window, click QUIT to close the window.
SLAVE WRITE CONTROL
UPDATE THE REGISTER WITH
THE WRITE CONTENTS
10810-014
MASTER WRITE CONTROL
Figure 14. Read/Write Control Register Overview
Within the tabs of this window all the individual control registers can be accessed. The ECG control register is shown in Figure 15, giving
access to master and slave control. Note that for certain conditions, the slave device must match the master device configuration. As a
result, the software locks out some of the slave control to ensure that the settings of the master and slave will always match (for example,
gain setting, high performance mode, clock source, and so on).
Rev. A | Page 12 of 44
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10810-015
EVAL-ADAS1000SDZ User Guide
Figure 15. ECG Control Register
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ECG CAPTURE
The ECG Capture tab allows users to view the ECG patterns at the different data rates, in vector or electrode mode.
The tab panel on the right allows quick, easy configuration of the different parameters—filter, data rate, power mode, vector/electrode in
the panel on the right.
1.
Once the appropriate registers are configured to start a capture, proceed to the ECG capture window. The ADAS1000 starts
streaming ECG data. The signal shown in Figure 16 is a 60 bpm signal coming from the Fluke PS420 simulator.
REMOVE
ELECTRODES/LEADS
IF DESIRED
USE LABVIEW FILTER
TO INSERT HPF FOR
DIAGNOSTIC OR
MONITOR BANDWIDTH
EASY ACCESS TO
DIFFERENT CONTROL
PARAMETERS
SELECT MASTER OR
SLAVE DEVICE TO
VIEW ECG
LABVIEW CHART
TOOLS TO
ANALYSE DATA
10810-016
2kHz DATA RATE
Figure 16. ECG Capture Window with Extra Filtering
•
•
•
•
2.
Quick settings allow the user control over the common features, such as data rate, electrode/vector data, gain, and filter
frequency.
This particular display is set up for lead (vector) display.
There is a tab that allows users to apply LabVIEW® filters.
There is also a tab that allows user to view the captured heart rate.
To zoom in on data to view in more detail, the LabVIEW chart tools are available for use. Simply stop streaming and then use the
graph zoom for X or Y to zoom in the chart of interest. Rescaling of the Y-axis can also be done by first right clicking and turning off
the autoscale feature.
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ECG CAPTURE WITH DIGITAL POST PROCESSING
The ECG capture window allows the user to use a LabVIEW filter (0.05 Hz) to view diagnostic bandwidth in addition to ac coupling the
signal (using LabVIEW VI).
Insert a LabVIEW HPF for ac coupling. (ADAS1000 is a dc coupled design).
Insert a LabVIEW HPF or 0.5 Hz or 0.05 Hz.
10810-017
1.
2.
Figure 17. Different Tabs Providing Differing Controls Within the ECG Capture Window. Controls include: LabVIEW filters,
the test tone feature, and graph control, respectively.
Note that the software also allows users to detect heart rate. This applies to LEAD II (see Figure 18).
When finished with the ECG capture window, click QUIT to close the window.
HEART RATE
DISPLAY
10810-018
3.
4.
Figure 18. ECG Capture Window with Heart Rate Shown
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EVAL-ADAS1000SDZ User Guide
LEADS OFF CONTROL
The lead off tab allows the user to control which lead off feature is operating (ac or dc) and programs the current and threshold levels. For
dc lead off, remember the VCM is 1.3 V; therefore the upper threshold should be in excess of 1.3 V to ensure capture of a lead off event.
For ac lead off, the threshold levels are represented in terms of amplitude by multiplying π/2. Note that the levels may need to be adjusted
to find the appropriate levels to detect ac leads amplitude.
Configure the mode of lead off detection (either ac or dc).
Set the current levels.
Program the threshold levels of the detection circuitry (applies to ac lead off).
Write the changes to the register by clicking Update, which is available within the LOFF Threshold Levels tab.
When finished, click QUIT to close the window.
PROGRAM THE APPROPRIATE
CURRENT LEVELS
AC : 0nA TO 100nA
DC : 0nA TO 70nA
PROGRAM THE THRESHOLDS
FOR DETECTION
QUICK SETUP—DC
LEAD OFF
CHOOSE AC
OR DC
10810-019
1.
2.
3.
4.
5.
Figure 19. Leads Off Control and Display Chart
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RESPIRATION
The Respiration window allows configuration of the respiration feature and display of the respiration rate.
2.
3.
Use Quick Respiration Setup to quickly configure the device. Figure 20 shows the respiration signal capturing a respiration signal
provided by the Fluke PS420.
Configure the settings in the respiration register for many different options. See Figure 20 and see the Flexible Respiration Feature on
Master ADAS1000 section for a description.
When finished, click QUIT to close the window.
CONFIGURATION SETTINGS FOR
RESPIRATION MEASUREMENT
QUICK RESPIRATION SETUP—
PRE-CONFIGURES SETTINGS
10810-020
1.
Figure 20. Respiration Magnitude Chart
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EVAL-ADAS1000SDZ User Guide
PACE
The Pace register control offers a number of different features. The pace algorithm is three instances of a digital algorithm, therefore it can
run on 3 leads at one time. The algorithm is designed to detect pace widths that range from 100 µs to 2 ms and amplitudes of 400 µV to
1000 mV. For pace capture, the software is streaming data at the chosen data rate. The data rate chosen does not have an effect on the
ability of the pace detection algorithm to detect a pulse since the pace algorithm always processes the 128 kHz frame rate.
4.
5.
Choose which lead each pace algorithm analyses.
Configure the different threshold levels for the desired ranges.
Use Quick Pace Setup to program the pace control and thresholds to default levels, and to start to stream pace data.
When a pace signal is detected, the frame header flags it. The pace algorithm makes a measure of the height and width of the
detected pace and provides that information for readback. There are two ways of returning the width and height information from
the register reads, one from within the frame and another from a direct read of the pace height/width register which is a more
accurate result. Pace Validation Filter 1 and Filter 2 are for noise and MV pulse filtering. The pace width filter rejects signals <100 µs
and >2 ms.
If using the 2 kHz data rate, the pace signal may be filtered out by the programmable LPF available in this data rate. Adjust the Low
Pass Filter setting to allow the pace signal to be more visible.
Note there are three pace algorithms and three pace windows to view. Each algorithm has its own threshold register settings.
When finished, click QUIT to close the window.
3 PACE WINDOWS TO VIEW
SCREEN CAPTURE OF PACE ON
PACE 1 LEAD II
PACE LEVELS CONTROL
FILTER
ENABLES
CHOOSE THE
LEADS
FLAGS PACE
DETECTED
HEIGHT
WIDTH
10810-021
1.
2.
3.
Figure 21. Pace Window
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UNDERSTANDING PACE IN THE ADAS1000
Consult the ADAS1000 data sheet for full details on the pace detection operation. Under Pace Controls, as shown in Figure 21, a user
has access to set up three different instances of pace to analyse the particular leads of interest (choices of LEAD I, II, III, and VF).
The pace algorithm is a state machine that operates on the 128 kHz 16-bit data. When enabled, it works to identify the leading edge and
trailing edge of the pace pulse and can output the width and height of that pulse as detected on the surface of the skin.
The configuration registers are shown in Figure 22.
SET THE DESIRED MINIMUM PACE
AMPLITUDE TO DETECT,
THRESHOLD = N × VREF /GAIN/216
SET THE EDGE THRESHOLD, THE
EDGE TRIGGER/THRESHOLD IS USED
TO FIND A LEADING EDGE
THRESHOLD = N × VREF /GAIN/216
10810-022
SET THE LEVEL THRESHOLD WHICH
IS USED TO FIND THE LEADING
EDGE PEAK
THRESHOLD = N × VREF /GAIN/216
Figure 22. Pace Levels Tab
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EVAL-ADAS1000SDZ User Guide
WRITE TO A FILE
A Write to File tab allows storage of a data capture over a period of time. Select either raw (date read back and provided in decimal
format), voltages (software calculates the corresponding voltage of each lead/electrode), or parsed (where parsed breaks out the header
word and the remaining words are provided in decimal format) file for offline processing.
CHOOSE FORMAT
TO SAVE
10810-024
CHOOSE HOW MANY
SECONDS OF CAPTURE
TO SAVE
Figure 23. Write to File Tab
When you click Write to File, a Choose file to write window opens (see Figure 24).
Select the appropriate location and name the file with the name of your choice. Using an extension like .dat or .xls works well here.
The data is formatted tab delimited as shown in Figure 24. This data can be copied into Microsoft® Excel® and processed offline.
CHOOSE THE LOCATION
AND NAME THE FILE
10810-025
1.
2.
Figure 24. Choose the Location and Name the File
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RAW
10810-026
When you save raw data, this saves data in decimal codes. The information from the header file is shown first (details about lead status,
pace, fault, overflow, and so on) followed by the lead words and any other words that are enabled in the Frame Control register (pace,
respiration, lead off, and so on).
Figure 25. Data Stored in File When Saved as RAW Data
Parsed
10810-027
Saving data as parsed saves the ECG data in decimal codes. The information from the header file is shown first (details about lead status,
pace, fault, overflow, and so on) and parsed out into each individual bit. This is followed by the lead/electrode words and any other words
that are enabled in the Frame Control register (pace, respiration, lead off, and so on).
Figure 26. Data Stored in File When Saved as Parsed Data
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Voltage
10810-028
Voltage processes the electrode data and provides the equivalent voltage level of each electrode. The header and other words within the
frame are stripped out of this data capture.
Figure 27. Data Stored in File When Saved as Voltage
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TEST TONES
The ADAS1000 has built-in test tones that can put out a 10 Hz or 150 Hz 1 mV sinewave, in addition to a 1 mV calibration pulse.
1.
Configure the ADAS1000 for electrode mode in the ECGCTL register (see Figure 15) to be able to see these signals correctly. If
the ADAS1000 is configured for vector/lead mode, then the test tone signals are subtracted from each other. Also, in the CMREFCTL
register, none of the electrodes should be configured to contribute to the common-mode signal.
2.
Use the Test Tone tab to configure this data.
10810-029
A 10 Hz sine wave is shown in Figure 28. Applying an offset of 2 mV helps to enable viewing.
Figure 28. Viewing the Internal 10 Hz Sine Wave Test Tone Applied to the Master Device ECG Channels
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EVAL-ADAS1000SDZ User Guide
10810-030
Figure 29 shows the test tone signal programmed with a 1 Hz square wave (with an offset of 3 mV to enable viewing). Again, electrode
mode is needed for correct viewing, and none of the electrodes should be configured to contribute to the common-mode signal.
Figure 29. Viewing the Internal 1 Hz Square Wave Test Tone Applied to the Master Device ECG Channels
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COMMON-MODEL LEVEL/WILSON CENTRAL TERMINAL
Common-Mode Level/Wilson Central Terminal
The ADAS1000 allows flexible configuration of the common-mode signal, in that any of the electrodes can be used to generate the
common-mode level VCM. When no electrodes are selected to contribute to the common mode level, then the VCM = VCM_REF
which is the internal 1.3 V level.
The Wilson central terminal of (RA + LA + LL)/3 can be configured here also as shown in Figure 30.
The VCM can be brought out to the CM_OUT pin.
The VCM level used internally can come from the internal VCM level (as arranged by the selection of electrodes). Alternatively, it
can be sourced externally from the CM_IN pin (for example, if using multiple ADAS1000 devices and wishing to share the VCM
across them–the master device could provide the CM_OUT to the slave devices CM_IN pin, so they are all referenced to the same
common-mode level).
WILSON CENTRAL TERMINAL
CONFIGURATION
ENABLE THE VCM TO
APPEAR ON CM_OUT PIN
SELECT WHERE CM IS
COMING FROM
10810-031
•
•
•
Figure 30. CMREFCTL 0x05 Table
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DETAILED DESCRIPTION
OVERVIEW OF SCHEMATICS
instruments, and absorbs the dc or ac lead-off currents injected
on the ECG electrodes. The right leg reference signal may also
be redirected onto any of the other electrodes (in absence of
right leg electrode connection). Gold pin connectors are
provided for replacement purposes. Nominal values used here
are RZ = 100 kΩ, CZ = 2 nF, RFB = 3.9 MΩ, and RIN = 39 kΩ.
Refer to Figure 47 for schematics related to the master device.
The master device provides ECG electrodes RA, LA, LL, V1,
V2, and RLD (see Figure 46) while the slave device services
ECG electrodes V3, V4, V5, V6, and a spare channel.
ECG Protection
VREG EN
The ADAS1000 device has standard ESD cells on board. In
addition, SP724 SCR/diode protection arrays are used on the
ECG input paths; however, they are not provided for defib
protection purposes.
VREG_EN = 1 (LK9 open) allows the internal LDO supplies to
power the DVDD and ADCVDD rails. If using the J5 connector
to supply DVDD and ADCVDD rails directly to the part,
VREG_EN = 0 (LK9 closed) disables the on-board regulators.
Optional Component Space on ECG path
If using the J5 connector to supply DVDD and ADCVDD rails
directly to the part, also remove LK17 and LK18.
Optional component space is provided for user-supplied cable
and filter modelling in addition to pull-down resistors to RLD.
Note that these limit the detection of dc leads of function
because, if used, any off electrode would then be sitting at the
RLD level and, thus, may no longer be detectable by the dc
lead off circuit, particular at low current levels).
An optional pace interface is available via Connector J6. This is
a master interface and provides fast 128 kHz ECG data for
external digital pace algorithm purposes.
Right Leg Drive
POWER
The right leg drive amplifier or reference amplifier is used as
part of a feedback loop to force the patient’s common-mode
voltage close to the ADAS1000 series internal 1.3 V reference
level (VCM_REF). This centers all the electrode inputs relative
to the input span, providing maximum input dynamic range.
It also helps to reject noise and interference from external
sources such as fluorescent lights or other patient-connected
The ADP2503 buck-boost regulator is included to allow for
battery powered operation from 3 × AA (4.5 V) batteries.
PACE INTERFACE (OPTIONAL)
ADP151 LDOs provide the AVDD = 3.3 V and IOVDD =3.3 V
rails required. IOVDD = 3.3 V as the SDP board interface
expects 3.3 V input levels (see Figure 49).
EXTERNALLY SUPPLIED COMPONENTS CZ
TO SET RLD LOOP GAIN
2nF
40kΩ
RIN*
RLD_SJ
RZ
100kΩ
RFB*
4MΩ
RLD_OUT
CM_OUT/WCT
10kΩ
SW2
10kΩ
SW3
10kΩ
SW4
10kΩ
SW5
10kΩ
ELECTRODE LL
ELECTRODE RA
ELECTRODE V1
ELECTRODE V2
SW6
CM_IN OR
CM BUFFER OUT
VCM_REF
(1.3V)
–
SW1
ELECTRODE LA
+
10kΩ
RLD_INT_REDIRECT
*EXTERNAL RESISTOR RIN IS OPTIONAL. IF DRIVING RLD FROM
THE ELECTRODE PATHS, THEN THE SERIES RESISTANCE WILL
CONTRIBUTE TO THE RIN IMPEDANCE. WHERE SW1 TO SW5
ARE CLOSED, RIN = 2kΩ. RFB SHOULD BE CHOSEN
ACCORDINGLY FOR DESIRED RLD LOOP GAIN.
10810-100
ADAS1000
Figure 31. Right Leg Drive Configuration on Evaluation Board
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FLEXIBLE RESPIRATION FEATURE ON MASTER ADAS1000
Respiration measurement is made in the master device. The
respiration path is equipped with much flexibility for evaluation
purpose. Figure 32 and Figure 33 illustrate the different methods
of respiration measurement via different paths.
The control of the respiration function is described in the
ADAS1000 data sheet.
Internal Drive/Measure via the ECG Paths
2.
Configure the RESPCTL register (0x3) as follows:
RESPCAP = 0 (internal).
Choose a relevant lead for measurement (RESPSEL), drive
frequency (RESPFREQ), measurement gain (RESPGAIN),
and so on.
Figure 32. RESPCTL Controls–Respiration Cap
Configuring the Links
Note that the ADAS1000 respiration measurement is only made
on one lead at any one time. However, the choice of lead is
programmable: choose either LEAD I, LEAD II, or LEAD III.
For simplicity, Figure 33 allows the flexibility of programming
the ADAS1000 respiration register to measure on all 3 leads
(again, only 1 lead at any one time). This may not be the
practice in end applications, therefore if a user is only interested
in one particular lead during evaluation of the respiration
function, adjust the links accordingly.
Note that Figure 33 shows RC components which may represent
input filtering or cable model.
ADAS1000
LK4
EXT_RESP_RA
A
EXT_RESP_LL
B
EXT_RESP_LA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
A B C
LK1
LK2
RESPIRATION PATH
FROM ECG ELECTRODES
LK1, LK2, LK3, LK4, LK19 OPEN
RESP_DAC_LL
RESP_DAC_RA
LA
LA
LL
LL
RA
RA
CABLE
FILTER
Figure 33. Respiration Drive Using Internal Capacitor, Respiration Measurement Using ECG Path
Rev. A | Page 27 of 44
10810-034
1.
10810-033
The primary respiration method uses internal respiration
drive and measure. In some applications, this will require no
external components and uses the standard ECG electrodes.
In the evaluation board, a number of links are used to allow a
user to evaluate different respiration configurations. For this
instance, LK1, LK2, LK3, LK4, and LK19 can be open.
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EVAL-ADAS1000SDZ User Guide
Internal Drive/Measure via the ECG/EXT_RESP Paths
Configuring the Links
This configuration allows the user to potentially bypass any
ESIS filtering in the ECG path. Note that the input range of
the EXT_RESP_XX pins must not be exceeded.
Note that the ADAS1000 respiration measurement is only made
on one lead at any one time. In the ext_resp path, the
EXT_RESP_RA is always enabled internally and the user has a
choice of EXT_RESP_LA or EXT_RESP_LL giving options of
LEAD 1 or LEAD III.
For simplicity, Figure 35 allows the flexibility of programming
the ADAS1000 respiration register to measure on these 2 leads
(again, only 1 lead at any one time). This may not be the practice in the end application, therefore if you are only interested
in one particular lead during evaluation of the respiration
function, adjust the links accordingly.
In this example, LK4 and LK1 would be inserted and LK2
would be open. Note that Figure 35 shows RC components
which may represent input filtering or cable model.
Figure 34. RESPCTL Controls–Respiration Lead Select
ADAS1000
LK4
EXT_RESP_LA
A
EXT_RESP_LL
B
EXT_RESP_RA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
A B C
LK1
LK2
RESPIRATION PATH
FROM ECG ELECTRODES
USING EXT_RESP PATH
LK1, LK4, CLOSED
LK2, LK3, LK19 OPEN
DRIVE/
MEASURE (J1)
RESP_DAC_LL
RESP_DAC_RA
LA
LA
LL
LL
RA
RA
CABLE
FILTER
10810-036
2.
3.
Configure the RESPCTL register (0x3) as follows:
RESPCAP = 0 (internal capacitor),
RESPSEL = 11 (EXT_RESP path selected).
Choose which path to measure on RESPSELEXT.
Choose the appropriate drive frequency (RESPFREQ),
measurement gain (RESPGAIN), and so on.
10810-035
1.
Figure 35. Respiration Drive Using Internal Capacitor, Respiration Measurement Using ECG Paths via the EXT_RESP Path
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Internal Drive/Measure via the EXT_RESP Path
Configuring the Links
This configuration allows the user to measure directly from the
respiration connector provided on the board (J8).
Note that the ADAS1000 respiration measurement is only made
on one lead at any one time. In the ext_resp path, the
EXT_RESP_RA is always enabled internally and the user has a
choice of EXT_RESP_LA or EXT_RESP_LL giving options of
LEAD 1 or LEAD III.
For simplicity, Figure 37 allows the flexibility of programming
the ADAS1000 respiration register to measure on these 2 leads
(again, only 1 lead at any one time). This may not be the practice in the end application, therefore if you are only interested
in one particular lead during evaluation of the respiration
function, adjust the links accordingly.
In this example, LK4 would be inserted and LK1 and LK2
would be open. Note that Figure 37 shows RC components
which may represent input filtering or cable model.
Figure 36. RESPCTL Controls–Respiration Lead Select
ADAS1000
LK4
EXT_RESP_LA
DRIVE/
MEASURE (J8)
A
EXT_RESP_LL
B
EXT_RESP_RA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
A B C
LK1
LK2
RESPIRATION PATH
FROM EXT_RESP CONNECTOR
(J8) USING EXT_RESP PATH
LK4, CLOSED
LK1, LK2, LK3, LK19 OPEN
RESP_DAC_LL
RESP_DAC_RA
LA
LA
LL
LL
RA
RA
CABLE
FILTER
Figure 37. Respiration Drive Using Internal Capacitor, Respiration Measurement via EXT_RESP Path
Rev. A | Page 29 of 44
10810-038
2.
3.
Configure the RESPCTL register (0x3) as follows:
RESPCAP = 0 (internal capacitor),
RESPSEL = 11 (EXT_RESP path selected).
Choose which path to measure on RESPSELEXT.
Choose the appropriate drive frequency (RESPFREQ),
measurement gain (RESPGAIN), and so on.
10810-037
1.
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EVAL-ADAS1000SDZ User Guide
External Drive/Measure via the ECG Path
This configuration allows the user to drive via external
capacitors provided on the board and measure back through
the ECG path. This mode requires external capacitors in the
RESPDAC_XX paths. Note that when this mode is enabled,
RESPDAC_RA is always enabled.
10810-039
2.
Configure the RESPCTL register (0x3) as follows:
RESPOUT = 0/1 (0 = RESPDAC_LL, 1 = RESPDAC_LA),
RESPCAP = 1 (external capacitor),
RESPSEL = XX (Lead I, II, III).
Choose appropriate drive frequency (RESPFREQ),
measurement gain (RESPGAIN), and so on.
Figure 38. RESPCTL Controls–Respiration Cap
Configuring the Links
Note that the ADAS1000 respiration measurement is only made
on one lead at any one time. However, the choice of lead is
programmable, choose either LEAD I, LEAD II or LEAD III.
For simplicity, the drawing that follows allows the flexibility
of programming the ADAS1000 respiration register to measure
on all 3 leads (again, only 1 lead at any one time). This may
not be the practice in the end application, therefore if you are
only interested in one particular lead during evaluation of the
respiration function, adjust the links accordingly.
In this example, LK4 would be open and LK1 and LK2 would be
inserted.
ADAS1000
LK4
EXT_RESP_LA
A
EXT_RESP_LL
B
EXT_RESP_RA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
A B C
LK1
LK2
DRIVE
EXTERNAL RESPIRATION DRIVE
USING EXTERNAL CAPACITOR
MEASURE ON ECG PATHS.
RESP_DAC_LL
RESP_DAC_RA
LK1, 2 CLOSED
LK3, 4, 19 OPEN
LA
LA
MEASURE
LL
LL
RA
RA
CABLE
FILTER
Figure 39. Respiration Drive Using External Capacitor, Respiration Measurement Using ECG Paths
Rev. A | Page 30 of 44
10810-040
1.
EVAL-ADAS1000SDZ User Guide
UG-426
External Drive/Measure via the EXT_RESP Path
This configuration allows the user to drive via external capacitors provided on the board and measure back through the
EXT_RESP path. Note that when this mode is enabled,
RESPDAC_RA is always enabled.
10810-041
2.
Configure the RESPCTL register (0x3) as follows:
RESPOUT = 0/1
(0 = RESPDAC_LL, 1 = RESPDAC_LA),
RESPCAP = 1, (external capacitor),
RESPSEL = 11 (external respiration path),
RESPEXTSEL = 0/1
(0 = EXT_RESP_LL, 1 = EXT_RESP_LA).
Choose the appropriate drive frequency (RESPFREQ),
measurement gain (RESPGAIN), and so on.
Note that the selected RESPDAC_LL or RESPDAC_LA need to
match the selected EXT_RESP_LL/LA selected when measuring
on the external range. The example for register settings in
Figure 41 shows RESPDAC_LA and EXT_RESP_LA selected,
therefore LK2AC, LK4AC and LK1AC need to be inserted.
Figure 40. RESPCTL Controls–Respiration Cap and
Respiration Lead Select
Configuring the Links
Note that the ADAS1000 respiration measurement is only made
on one lead at any one time. In the ext_resp path, the
EXT_RESP_RA is always enabled internally and a user has a
choice of EXT_RESP_LA or EXT_RESP_LL giving options of
LEAD 1 or LEAD III.
For simplicity, Figure 41 allows the flexibility of programming
the ADAS1000 respiration register to measure on these 2
leads (again, only 1 lead at any one time). This may not be
the practice in the end application, therefore if you are only
interested in one particular lead during evaluation of the
respiration function, adjust the links accordingly.
ADAS1000
LK4
EXT_RESP_LA
A
EXT_RESP_LA
MEASURE
EXT_RESP_LL
B
EXT_RESP_RA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
A B C
LK1
LK2
DRIVE
EXTERNAL RESPIRATION DRIVE
USING EXTERNAL CAPACITOR
MEASURE ON EXT RESP PATHS.
RESP_DAC_LL
RESP_DAC_RA
LK1, LK2, LK4 CLOSED
LK3, LK19 OPEN
LA
LA
LL
LL
RA
RA
CABLE
FILTER
10810-042
1.
Figure 41. Respiration Drive Using External Capacitor, Respiration Measurement Using ECG Paths via the EXT_RESP Path
Rev. A | Page 31 of 44
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EVAL-ADAS1000SDZ User Guide
External Drive/Measure Using External Instrumentation
Amplifier Stage Bypassing Internal ADAS1000
Respiration In-Amp
This configuration allows the user to drive via external capacitors provided on the board and measure back through the
EXT_RESP path.
1.
2.
the gain as desired. The range of gain needs to be limited such
that the input range <±0.7 V.
Note that this configuration of ADAS1000 respiration
measurement is only made on one lead. (LEAD I).
Configure the RESPCTL register (0x3) as follows:
RESPAMP = 1 (enabled),
RESPOUT = 1 (RESPDAC_P1),
RESPCAP = 1 (external capacitor),
RESPSEL = 11 (external respiration path),
RESPEXTSEL = 1 (EXT_RESP3).
Choose the appropriate drive frequency (RESPFREQ) and
measurement gain (RESPGAIN) as required.
An alternative instrumentation amplifier with lower noise
performance or operated from a higher supply rail may achieve
improved performance in a similar arrangement. Note that the
RG value in the AD8226 circuit is open, setting a gain of 1 in
this circuit. There is a resistor location (R79) available to adjust
10810-043
For simplicity, the AD8226 instrumentation amplifier, operating
from a 3.3 V supply rail, was used for this example. The noise
performance of the AD8226 does not provide significant
improvement over that of the ADAS1000, therefore any
evaluations with this instrumentation amplifier may not
provide appreciable respiration performance improvements.
Figure 42. RESPCTL Controls–Respiration Ext Amp and
Respiration Lead Select
Configuring the Links
In this example, LK1AC, LK2AC, LK15, and LK16 are all
inserted; LK4 is open. LK3A and LK19A allow a user to choose
a lead.
Rev. A | Page 32 of 44
EVAL-ADAS1000SDZ User Guide
UG-426
LK15
AD8226
RLD
REF
MEASURE
VREF/2 = 0.9V
10kΩ
10kΩ
1/2 AD8606
A
B A
L3
LK16
B
L19
RLD
1/2 AD8606
ADAS1000
REFOUT
100kΩ
LK4
EXT_RESP_LA
A
100kΩ
EXT_RESP_LL
B
EXT_RESP_RA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
C
SHIELD
SHIELD/RESP_DAC_LA
C B A
EXTERNAL RESPIRATION DRIVE
USING EXTERNAL CAPACITOR ONTO
ECG PATHS
MEASURE ON ECG PATHS USING
EXTERNAL INAMP DIRECTLY
INTO EXT_RESP MEASURE PATH
A B C
LK1
LK2
DRIVE
LK1ac, LK2ac, LK15, LK16 CLOSED LA
LK4 OPEN
LK3a, LK19a CHOOSE LEAD
LA
LL
LL
RA
RA
CABLE
FILTER
10810-044
RESP_DAC_LL
RESP_DAC_RA
Figure 43. Respiration Drive Using External Capacitor, Respiration Measurement with External Amplifier
TROUBLESHOOTING
6.
Hardware
The following procedure can help detect if there are issues
connecting to the evaluation board or reading data.
1.
2.
3.
4.
5.
Connect the ADAS1000 J2 to the SDP board connector.
Apply power to the ADAS1000 J9 connector, and then
connect the USB cable to SDP J1. D10 should appear lit
on the ADAS1000 board; LED1 should appear lit on the
SDP board.
Confirm that the SDP board is seen in the Device
Manager as shown in Figure 8.
Measure voltages at IOVDD and AVDD. Both these
voltages should measure approximately 3.3 V.
Launch the software.
7.
8.
9.
Rev. A | Page 33 of 44
From the Main Front Panel, one should be able to
read/write from the device and start streaming data. The
ADAS1000 device powers up “powered down”, therefore, a
number of writes are needed to configure the device. This
can be quickly done by clicking the Default Setup on the
front panel. This action writes a number of codes to the
device to power it on, thus enabling channels to read and
to capture ECG data.
Confirm the contents of the registers by clicking on
Program All RW reg from the front panel.
If the read/write is not operating correctly, power down the
board and check that the ADAS1000 chip is correctly
inserted and that theclamp is used to hold the ADAS1000
to the board is not overly tight.
If required, replace the ADAS1000 chip.
UG-426
EVAL-ADAS1000SDZ User Guide
Software
CLAMP
The default folder for the install is
C:\Program Files\Analog Devices\ADAS1000
For some boards, the ADAS1000 devices are attached to the
board using a plastic clamp with 4-corner screws for ease of
replacement. These clamps press on the leads of the package
making a good connection with the pads underneath. The
screws should not be over tightened.
This folder contains the files shown in Figure 44.
Confirm these files are present. If they are not present,
then reinstall the software from the CD. A reboot may be
required after the installation process.
10810-045
1.
2.
10810-046
Figure 44. Files Installed in Analog Devices Folder
Always install the software prior to first connecting the
evaluation board/SDP to the PC.
Figure 45. Unit Clamped to Board
Rev. A | Page 34 of 44
DNP
C59
DNP
C33
DNP
C32
DNP
C31
DNP
C30
DNP
C29
DNP
C28
DNP
C27
DNP
C26
Optional Cable Model
0r
R90
0r
R12
0r
R13
0r
R14
0r
R15
0r
R16
0r
R17
0r
R18
0r
R19
C25
DNP
AGND
1
IN1
3
D3
IN2
4
IN3 SP724
6
IN4
V2
470k
AVDD
LK3 A
RL
AGND
1
IN1
3
D2
IN2
4
IN3 SP724
6
IN4
B
LK19
External Drive, Receive with ext in-amp (Use ECG Cables): Open LK4, Close LK1, 2, 3C & (3A or 3B)
External Drive, Receive on EXT Resp Channels (Use ECG Cables): Open LK3, Close LK1, 2, 4
External Drive, Receive on ECG Channels (Use ECG Cables): Open LK3, 4, Close LK1, 2
Internal Drive, Receive on EXT Resp Channels (Use RESP Cables): Open LK1, 2, 3, Close LK4
Internal Drive, Receive on EXT Resp Channels (Use ECG Cables): Open LK2, 3. Close LK1, 4
R11
RESP_INPUT1
RESP_INPUT2
LK10
Shield can be driven by
Internal Amp (LK10 A) or if using
EXT_Respiration Drive, then
connect LK10 B
Internal Drive: Receive on ECG Channels: Open LK1-LK4
RESPIRATION
CE
RLD
V2
V1
RA
LL
LA
SHIELD
EXT_RESP_LA
EXT_RESP_LL
0r
R20
Cable Model
A
B
EXT_RESP_RA
NOT DEFIBRILLATOR PROTECTED
V+
5
AVDD
D6
SLAVE depends on signals from the MASTER device for GANG Purposes
D4
A
B
P6SMB6.8CA
6.8V
A
SPARE
LK1
P6SMB6.8CA
6.8V
22M
R24
22M
R22
B
AVDD
Optional Resistors to RLD f or Lead Off
22M
R74
22M
R25
22M
R23
22M
R21
C36
LK2
AGND
1
IN1
3
D1
IN2
4
IN3 SP724
6
IN4
0.9VREF
0r
0r
0r
0r
0r
0r
0r
0r
R73
DNP
DNP
0r
R32
0r
R87
0r
R88
MASTER
CLAMP-10MM
U1 device is clamped onto the board
Optional Fil ter Model
0r C111
DNP
C46
DNP
C45
DNP
C44
DNP
C43
DNP
C42
C110
R75
0r
0r
DNP
R10
R9
C41
DNP
R8
R7
C40
DNP
R6
R5
C39
DNP
R4
R3
C38
DNP
R2
C37
1n
0r
C34
C35
R1
1n
1n
A
B
C
LK4
RESP_MEAS2
RESP_MEAS1
Fed f rom output of Optional External Resp Circuit
R39
100k
R38
100k
LK5
C2
C6
0.1uF
C7
0.1uF
RFB
DNP
C56
RZ
RLD_OUT
ECG5_V2
ECG4_V1
ECG3_RA
ECG2_LL
ECG1_LA
R27
DNP
C5
0.1uF
SHIELD/RESP_DAC_LA
RESP_DAC_LL
RESP_DAC_RA
EXT_RESP_LA
EXT_RESP_LL
EXT_RESP_RA
0.1uF
AVDD
AGND
Y1
C23
15pF
8.192 MHz
64 Lead LQFP
Final Silicon Pinout
RLD_SJ
LK8
C8
+ C9 +
C22
15pF
4.7uF 4.7uF
C11
10k
R86
C14
C18
C19
2.2uF 0.1uF 0.1uF
+ C17
C15
C16
DNP
C21
DNP
VREG_EN
DNP
C20
DNP
54
53
R35
R34
0r
0r
R29
R30
R31
0r
0r
0r
Use software DRDY b
GPIO1/MSCK
GPIO0/MCSB
GPIO2/MSDO
GPIO3
CSB_0
SDI_0
DRDYB
SDO_0
SCLK
RESETB
PDB
BUFCLK_IO
SYNC_GANG
Use SMB1 to drive with ext clock
EXT_CLK
Insert LK9 to disable internal voltage regulators f or ADCVDD & DVDD
User then nee ds to supp ly ADCVDD & DVDD externall y via J5
AVDD
DVDD
C13
2.2uF 0.1uF 0.1uF
+ C12
ADCVDD
52
LK9
0.1uF
29
1
17
33
64
32
48
49
16
41
CS
SDI 43
42
DRDY
45
SDO
44
SCLK
RESET
PD
SYNC_GANG
BUFCLK_IO
NC
NC
NC
NC
NC
NC
NC
NC
VREG_EN
59
50
DGND1
31
DGND2
30
DVDD1
51
DVDD2
25
AGND5
56
AGND6
26
ADC_VDD1
55
ADC_VDD2
U1
0.1uF
C10
Adaptor f or supp ly rail
board LDO and W all
Insert LK8 if using on
$$$16765
IOVDD
IOVDD_3.3V
W all Adaptor f or supp ly rail
Insert LK6 if using on board LDO and
ADAS1000
Slave ADAS100 0
goes to
CM_OUT
RIN
+
CAL_DAC_IO
T1
C3
4.7uF
AGND
C4
LK7
LK6
AVDD_3.3V
0.1uF
Use LK7 to measure
ADAS1000 AVDD Current
Component Not Inserted
CZ
20
14
13
12
11
10
60
62
3
6
5
4
10uF
C1
T9 T8
AGND
Insert LK5 if using External
respiration Amp path
7
REFGND
Use MASTER AND SLAVE CHANNEL COMBINATION for 12 LEAD Solution
C
D5
RLD_SJ
9
REFIN
61
CAL_DAC_IO
Use MASTER CHANNEL for 3/5 LEAD Solutions
5
V+
5
V+
V2
V2
A
P6SMB6.8CA
6.8V
35
IOVDD1
46
IOVDD2
XTAL_OUT
8
REFOUT
21
18
AVDD1
23
AVDD2
63
AVDD3
58
AVDD4
CM_IN
19
CM_OUT/WCT
22
15
AGND2
24
AGND3
57
AGND4
2
AGND1
XTAL_IN
27
Figure 46. Master ADAS1000 (RA, LA, LL, V1, V2, and RLD)
28
47
DGND4
40
DGND3
34
DGND3
GPIO1/MSCK
37
GPIO0/MCSB
36
GPIO2/MSDO
38
GPIO3
39
Rev. A | Page 35 of 44
10810-047
MASTER CHANNEL
EVAL-ADAS1000SDZ User Guide
UG-426
EVALUATION BOARD SCHEMATICS
C
B
SPARE
V6
V5
V4
V3
Goes to Spare SP724 channel in D1, Page 1
0r
R53
DNP
C85
DNP
C84
DNP
Cable Model
0r
R65
0r
R64
SLAVE
CLAMP-10MM
U1 device is clamped onto the board
RL
22M
22M
Component Not Inserted
Optional Resistors to RLD for Lead Off
22M
R56
R58
R57
0r
R47
0r
R49
0r
C83
22M
22M
0r
R60
R59
R51
DNP
C82
DNP
R63
0r
R62
0r
0r
D8
R55
AGND
1
3 IN1 D7
4 IN2
6 IN3 SP724
IN4
R61
C81
AVDD
SLAVE depends on signals from the MASTER device for GANG Purposes
Use SLAVE for 12 LEAD Solution
SLAVE CHANNEL
NOT DEFIBRILLATOR PROTECTED
5
V+
V-
2
K
A
0r
R46
0r
R48
0r
R50
0r
R52
0r
CM_OUT
DNP
C95
DNP
C93
DNP
C91
DNP
C89
DNP
C87
20
14
13
12
11
10
60
62
3
6
5
4
10uF
0.1uF
C60
RLD_OUT
ECG5_V2
ECG4_V1
ECG3_RA
ECG2_LL
ECG1_LA
SHIELD/RESP_DAC_LA
RESP_DAC_LL
RESP_DAC_RA
EXT_RESP_LA
EXT_RESP_LL
C64
0.1uF
CAL_DAC_IO
EXT_RESP_RA
CM_IN Comes from Master ADAS1000
Filter Model
DNP
C94
DNP
C92
DNP
C90
DNP
C88
DNP
C86
R54
AGND
C61
C65
0.1uF
7
REFGND
9
REFIN
C63
0.1uF
61
CAL_DAC_IO
C66
C62 +
RLD_SJ
SLAVE DEVICE
64 Lead LQFP
ADAS1000
AGND
4.7uF
AGND
IOVDD
35
IOVDD1 46
IOVDD2
XTAL_OUT
0.1uF
29
1
17
33
64
32
48
49
16
59
CS
SDI
DRDY
SDO
SCLK
41
43
42
45
44
RESET 54
PD 53
SYNC_GANG 52
BUFCLK_IO
NC
NC
NC
NC
NC
NC
NC
NC
VREG_EN
50
DGND1 31
DGND2
30
DVDD1 51
DVDD2
25
AGND5 56
AGND6
26
ADC_VDD1 55
ADC_VDD2
U2
0.1uF
C67 +C68 + C69
4.7uF 4.7uF
47
DGND4 40
DGND3 34
DGND3
AVDD
C70
ADCVDD
DVDD
LK17
R70
LK18
0.1uF
C73
C77
C78
C74
DNP
C79
DNP
SDO_1
SCLK
CSB_1
SDI_1
RESETB
PDB
SYNC_GANG
BUFCLK_IO
2.2uF 0.1uF 0.1uF
+ C76
VREG_EN
0r
C72
2.2uF 0.1uF 0.1uF
+ C71
C75
DNP
C80
DNP
10810-048
8
REFOUT
RLD_SJ
21
18
AVDD1 23
AVDD2 63
AVDD3 58
AVDD4
CM_IN
19
CM_OUT/WCT
22
15
AGND2 24
AGND3 57
AGND4 2
AGND1
XTAL_IN
27
Rev. A | Page 36 of 44
28
Figure 47. Slave ADAS1000 (V3, V4, V5, V6, and Spare)
GPIO1/MSCK
37 GPIO0/MCSB
36 GPIO2/MSDO
38 GPIO3
39
UG-426
EVAL-ADAS1000SDZ User Guide
EVAL-ADAS1000SDZ User Guide
UG-426
ADAS1000 SPI DIRECT CONNECTOR
DSub CONNECTOR- DB15 - ECG ELECTRODE CONNECTOR: (socket)
J1-1
V2
J1-2
V3
J1-3
V4
J1-4
V5
J1-5
V6
STANDARD SPI INTERFACE
RESETB
J4-2
LK14
J4-3
J1-6
SHIELD
J1-7
CE
J4-4
SDI_0
SDO_1
LK13
J4-7
LK12
J4-8
J1-9
RA
J1-10
LA
J1-11
LL
J1-12
V1
J1-13
SPARE
J1-14
RLD
SDI_1
J4-5
J4-6
J1-8
NOT DEFIBRILLATOR PROTECTED
PDB
J4-1
SDO_0
CSB_0
J4-9
CSB_1
J4-10
SCLK
J4-11
DRDYB
When using the SDP board, both ADAS1000
devices are driven with the same /CS (LK12 inserted)
J4-12
J4-13
J4-14
J1-15
J1-16
J1-17
Connector for External Respiration Inputs
J8-1
EXT_RESP_RA
J8-2
EXT_RESP_LL
J8-3
EXT_RESP_LA
J8-4
PACE INTERFACE FROM ADAS1000 #1
1
3
5
GPIO3
GPIO1/MSCK
J6
2
4
6
GPIO2/MSDO
GPIO0/MCSB
Header connector
Reset circuit for ADAS1000 /RESET : Combines reset button & SDP signal
IOVDD
C47
0.1uF
IOVDD
R44
100k
D11
R45
10k
Decoupling for U6
1
RESETB_SW
2
ADAS_RESET
T10
U3
4
LK11
RESETB
NC7S08
C48
0.1uF
10810-049
R43
100k
IOVDD
Figure 48. Connectors
Rev. A | Page 37 of 44
UG-426
EVAL-ADAS1000SDZ User Guide
2 pin screw terminal for bench +5V
POWER SUPPLY OPTIONS:
1. Wall Adaptor
2. 5V bench supply
3. Battery Powered
4. External Bench Supply for individual power raiils
Screw Terminals for External Power Supply
ADCVDD
J7-1
L1
J7-2
J5-1
1.5uH
BAT54FILM
D9
1
3
J3-4
4
5
8
J3-3
C49
7
C96
0.1uF
SW1
SW2
VOUT
VIN
FB
SYNC/MODE
10uF
J3-2
U9
ADP2503
PVIN
R26
EN
6
PGND
10uF
2
L2
1
10
3
C97
0.1uF
10uH
C24
22uF
C106
C107
0.1uF
0.1uF
R83
1k
AGND
9
J3-1
J5-2
D10
0r
AVDD
GREEN
J5-3
C104
AVDD
10uF
1
+5V
C50
R76
10k
3
U8
ADP151AUJZ-3.3
VIN
VOUT
AGND
5
AVDD_3.3V
C51
EN
GND
2
10uF
C103
0.1uF
10uF
C52
0.1uF
T12
DVDD
AGND
J5-4
C100
AGND
10uF
IOVDD
1
+5V
U6
ADP151AUJZ-3.3
VOUT
VIN
C99
0.1uF
J5-5
5
IOVDD_3.3V
AGND1
AGND2
IOVDD
C53
10uF
R80
10k
3
C54
EN
GND
2
10uF
C55
J5-6
C102
0.1uF
AGND3
AGND4
10uF
C101
0.1uF
10810-050
SMD DC POWER JACK
C98
+5V
Figure 49. On-Board Power Options (LDOs On-Board to Supply Power to ADAS1000 and Other Component)
Rev. A | Page 38 of 44
EVAL-ADAS1000SDZ User Guide
UG-426
VIO
VIO
Board ID EEPROM (24LC32) must be on I2C bus 0,
R68
R67
DNP
U7
1
2
3
4
100 K
R91
SDP Board Manual Reset
A0
A1
A2
VSS
VCC
WP
SCL
SDA
8
7
6
5
24LC32A-I/MS
100 K
SDP_RESET
T7
T6
SDI_1
SDO_1
+5V
VIN: Use this pin to power the SDP requires 5V 200 mA
J2
RESET_IN
UART_RX
GND
NC
EEPROM_A0
NC
NC
NC
GND
NC
NC
TMR_C *
BMODE1
UART_TX
GND
NC
SDP
NC
STANDARD
NC
CONNE CTOR
NC
NC
GND
NC
NC
TMR_D
TIMERS
TMR_A
TMR_B
GPIO6
GPIO7
GND
GND
GENE RAL
GPIO4
GPIO5
INPUT/OUT
PUT
GPIO2
GPIO3
GPIO0
GPIO1
SCL_1
SCL_0
I2C
SDA_1
SDA_0
GND
GND
SPI_SEL1/SPI_SS
SPI_CLK
SPI_SEL_C
SPI_MISO
SPI
SPI_SEL_B
SPI_MOSI
GND
SPI_SEL_A
SPORT_INT
GND
*
SPORT_DT3
SPORT_TSCLK
SPORT_DT2 *
SPORT_DT0
SPORT
SPORT_DT1
SPORT_TFS
SPORT_DR1
SPORT_RFS
SPORT_DR2 *
SPORT_DR0
SPORT_DR3 *
SPORT_RSCLK
GND
GND
PAR_FS1
PAR_CLK
PAR_FS3
PAR_FS2
PAR_A1
PAR_A0
PAR_A3
PAR_A2
GND
GND
PAR_CS
PAR_INT
PAR_RD
PAR_WR
PAR_D1
PAR_D0
PARALLEL
PAR_D3
PAR_D2
PORT
PAR_D5
PAR_D4
GND
GND
PAR_D7
PAR_D6
PAR_D9
PAR_D8
PAR_D11
PAR_D10
PAR_D13
PAR_D12
PAR_D14
GND
GND
PAR_D15
*
*
PAR_D17
PAR_D16
*
*
PAR_D19
PAR_D18
* PAR_D20
PAR_D21 *
* PAR_D22
PAR_D23 *
GND
GND
USB_VBUS
VIO(+3.3V)
GND
GND
GND
GND
NC
NC
*NC on BLACKFIN SDP
VIN
NC
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Main I2C bus (Connected to blackfin TWI - Pull up resistors not required)
T5
T3
T2
SCLK
SDI_0
CSB_0
SDO_0
VIO
Figure 50. SDP Connector Schematic
Rev. A | Page 39 of 44
T4
VIO: USE to set IO voltage max draw 20mA
10810-051
PDB
RESETB_SW
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
UG-426
EVAL-ADAS1000SDZ User Guide
OPTIONAL: External Amplifer Cicuit for Respiration Circuit
AVDD
T11
R84
0r
RESP_INPUT1
0.1uF
100pF
C108
1
R79
R81
1M
2
-IN
8
RG
+VS
C105
1n
RL
U4
AD8226
3
R82
1M
4
100pF
-VS
RG
+IN
REF
6
OUT
C109
LK15
7
RESP_MEAS1
5
T13
RESP_INPUT2
+VS
C57
Gain = 1 with no R79 (RG) resistor inserted.
G = 1 +(49.4k/RG)
R77
10k
-VS
R28
0r
R78
10k
U5-B
5 +
6 -
U5-A
3 +
7
AD8606 ARMZ
2 -
1
LK16
RESP_MEAS2
AD8606 ARMZ
AVDD
R85
0r
+VS
C58
0.1uF
U5-C V+
V-
8
4 AD8606ARMZ
-VS
R40
0r
10810-052
0.9VREF
Figure 51. Optional Respiration Circuit for Increased Respiration Resolution Measurement
Rev. A | Page 40 of 44
UG-426
10810-053
EVAL-ADAS1000SDZ User Guide
Figure 52. Component Placement–Silkscreen Top
Rev. A | Page 41 of 44
EVAL-ADAS1000SDZ User Guide
10810-054
UG-426
Figure 53. Component Placement–Bottom
Rev. A | Page 42 of 44
EVAL-ADAS1000SDZ User Guide
UG-426
NOTES
Rev. A | Page 43 of 44
UG-426
EVAL-ADAS1000SDZ User Guide
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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UG10810-0-3/14(A)
Rev. A | Page 44 of 44
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