WiMOD iM871A Datasheet Document ID: 4100/6404/0047

WiMOD iM871A Datasheet  Document ID: 4100/6404/0047
WiMOD iM871A
Datasheet
Document ID: 4100/6404/0047
IMST GmbH
Carl-Friedrich-Gauß-Str. 2-4
47475 KAMP-LINTFORT
GERMANY
WiMOD iM871A
Datasheet
Datasheet
Document Information
File name
iM871A_Datasheet
Created
2011-06-10
Total pages
28
Revision History
Version
Note
0.8
0.9
1.0
1.1
Created, Preliminary Version
Table 3-2 updated
Table 4-2 and Chapter 6.3 updated
Table 3-5 updated
Aim of this Document
The aim of this document is to give a detailed product description including interfaces, features
and performance of the radio module iM871A.
iM871A_Datasheet, Wireless Solutions, v1.1
Page i
WiMOD iM871A
Datasheet
Introduction
Table of Contents
1. INTRODUCTION
4 1.1 Key Features
4 1.2 Applications
4 2. MODULE OVERVIEW
5 3. ELECTRICAL CHARACTERISTICS
6 3.1 Absolute Maximum Ratings
6 3.2 Global Electrical Characteristics
7 3.3 Module Interface Characteristics
8 3.4 RF Characteristics
9 3.4.1 Receiver RF Characteristics
3.4.2 Transmitter RF Characteristics
4. MODULE PACKAGE
9 10 11 4.1 Pinout Description
11 4.2 Internal Module Connection Diagram
13 4.3 Module Dimensions
14 4.4 Recommended Footprint
15 5. MODULE INTERFACE CHARACTERISTICS
16 5.1 Programming Interface
16 5.2 Input / Output Ports
16 5.3 Communication Interfaces
17 6. INTEGRATION GUIDE
18 6.1 Typical Application Schematic
18 6.2 PCB Design Recommendation
19 6.3 Recommended Soldering Conditions
20 7. MEASUREMENTS
21 8. ORDERING INFORMATION
23 9. APPENDIX
24 9.1 List of Abbreviations
24 9.2 List of Figures
25 9.3 List of Tables
25 iM871A_Datasheet, Wireless Solutions, v1.1
Page 2
WiMOD iM871A
9.4 References
Datasheet
Introduction
25 10. REGULATORY COMPLIANCE INFORMATION
26 11. IMPORTANT NOTICE
27 11.1 Disclaimer
27 11.2 Contact Information
27 iM871A_Datasheet, Wireless Solutions, v1.1
Page 3
Datasheet
Introduction
WiMOD iM871A
1.
Introduction
The iM871A is a compact, ultra low power, bidirectional radio module for the 868 MHz
frequency band. Using the iM871A in an application minimizes the need for an expensive
and time-consuming RF development. Fast time to market is possible with this pre-qualified
module.
Especially in combination with the Wireless M-Bus Stack [1], the iM871A is optimal suited
for use in Smart Metering Applications, which are compliant to EN 13757 part 4 [2].
Figure 1-1: Picture of iM871A
1.1
-
Key Features
Compact module 16.8 x 18.6 x 2 mm
for SMD mounting
Ultra low power modes for extended
battery lifetime
Communication/Configuration via
UART, SPI and I²C interface
Digital inputs and outputs
Analog inputs
Supply voltage range from 1.8 to 3.6 V
RF interface matched to 50 
Output power level up to +14 dBm
High link budget up to 130 dB
Range up to 3000 m (line of sight)
64 kByte Flash + 4 kByte RAM Memory
Pre-Certified according to EN 300 220
1.2
-
Applications
Wireless networks
Metering systems
Home-, building-, industrial automation
Remote control
Wireless sensors
Telemetry
…
Please visit our web site www.wireless-solutions.de for more information.
iM871A_Datasheet, Wireless Solutions, v1.1
Page 4
Datasheet
Module Overview
WiMOD iM871A
2.
Module Overview
The iM871A is an ultra-low-power, high-performance, pre-certified module for wireless
communication. It operates in the 868 MHz ISM frequency band and includes all
necessary passive components for wireless communication as depicted in Figure 2-1.
Figure 2-1: Block Diagram of Radio Module iM871A
The iM871A is able to transmit at RF power levels up to +14 dBm with a current
consumption of less than 39 mA. In receive mode, the maximum current consumption is
less than 19 mA with a sensitivity down to -116 dBm. And finally with a standby current of
less than 0.1 μA, the iM871A is optimal suited for battery powered devices while providing
great RF performance.
The iM871A provides several useable application interfaces1. For serial communication it
provides interfaces like UART and SPI. Furthermore it offers up to 17 GPIOs (if not using
other interfaces). Except one of the 17 GPIOs, all pins have the capability to be used as
analog input to the 10 bit ADC or additionally one external interrupt signal.
For low power consumption, the module supports the capability to periodically wake up
from sleep mode to listen for incoming RF packets. The RF data rate of the module is
adjustable up to 256 kbps. Decreasing the data rate will increase the sensitivity which
results in a longer RF range.
The module is solderable like a SMD component and can easily be mounted on a simple
carrier board with a minimum of required external connections. It is RoHS compliant and
pre-qualified in accordance to ETSI EN 300 220-2 V2.1.2. Moreover, with the available
firmware for Wireless M-Bus [1], the module is conform to EN 13757-4:2005 D [2].
The wide range of capabilities provided by the iM871A can be tested by using the
WiMOD Demo Board (part of the WiMOD Starter Kit).
1
Usability depends on combinational use with the other interfaces
iM871A_Datasheet, Wireless Solutions, v1.1
Page 5
Datasheet
Electrical Characteristics
WiMOD iM871A
3.
Electrical Characteristics
In the following different electrical characteristics of the iM871A are listed. Furthermore
details and other parameter ranges are available on request.
Note: Stress exceeding of one or more of the limiting values listed under
“Absolute Maximum Ratings” may cause permanent damage to the radio
module.
3.1
Absolute Maximum Ratings
Parameter
Condition
Supply Voltage (VDD)
Storage Temperature
Operating Temperature
Voltage on any Px-Pin
VDD > 2.2 V
VDD ≤ 2.2 V
Voltage on all Reserved Pins
Voltage on P15 acting as
external ADC reference
voltage (VREF)
Instantaneous peak voltage
on RF Pin
Sustained peak Voltage
on RF Pin
RF Input Power
Total Current through
VDD or GND
Output Current sunk by
RST or any Px Pin
Total Current through
all Px Pins
ESD (Human Body Model)
ESD (Machine Model)
All pins except RF
RF
All pins except RF
RF
Min
Typ.
Max
-0.3
+5
-20
-0.3
-0.3
-0.3
-
Unit
V
°C
°C
-
4.0
+35
+70
5.8
VDD + 3.6
VDD + 0.3
0
-
3.6
V
-0.3
-
+8.0
V
-0.3
-
+6.5
V
-
-
+10
dBm
-
-
500
mA
-
-
100
mA
-
-
200
mA
-
-
2
1
150
45
kV
kV
V
V
-
V
V
Notes:
1) Unless otherwise noted, all voltages are with respect to GND
Table 3-1: Absolute Maximum Ratings
iM871A_Datasheet, Wireless Solutions, v1.1
Page 6
Datasheet
Electrical Characteristics
WiMOD iM871A
3.2
Global Electrical Characteristics
T = 25°C, VDD = 3 V (typ.) if nothing else stated
Parameter
Supply Voltage (VDD)
Current Consumption
μC IDLE
Current Consumption
Systen SLEEP
Current Consumption
System IDLE
Current Consumption
RECEIVE
Condition
Min
Typ.
Max
1.8
3.0
3.6
TRX shut down,
μC idle mode,
TRX shut down,
μC sleep mode,
all μC units off
TRX idle mode,
μC idle mode
TRX receive mode,
μC sleep mode,
all μC units off
TRX transmit mode,
μC sleep mode,
all μC units off,
max. RF power level
Current Consumption
TRANSMIT(Note 4)
2.8
50
V
mA
100
nA
4.2
mA
18.8
mA
VDD = 1.8 V
27.5
mA
VDD = 3.0 V
34.1
mA
VDD = 3.6 V
36.7
24.5
mA
MHz
20
MHz
32.768
64
kHz
kByte
Erase/
Write Cycles
kByte
MCU operation frequency
Memory (Flash)
Flash Memory Endurance
Unit
1k
30k
Memory (RAM)
4
Notes:
1) Unless otherwise noted, all voltages are with respect to GND
2) MCT clock frequency equals 24.5 MHz
3) Transmitting of CW at 868.3 MHz
4) Refer to chapter 7 to get details about trasmitted RF power levels
Table 3-2: General Characteristics
iM871A_Datasheet, Wireless Solutions, v1.1
Page 7
Datasheet
Electrical Characteristics
WiMOD iM871A
3.3
Module Interface Characteristics
T = 25°C, VDD = 3 V (typ.) if nothing else stated
Parameter
Condition
Digital output voltage
(high level) (Note 2)
Digital output voltage
(low level) (Note 2)
Digital input voltage
(high level)
Digital input voltage
(low level)
Pulse width on RST pin
Power on reset delay
UART baud rate
SPI baud rate
Min
Typ.
Max
Unit
I = -3 mA
VDD - 0.7
-
-
V
I = -3 mA
-
-
0.6
V
VDD = 1.8 to 2.0 V
VDD = 2.0 to 3.6 V
VDD = 1.8 to 2.0 V
VDD = 2.0 to 3.6 V
Low active pin
VDD = 1.8 to 3.6 V
0.7 x VDD
VDD - 0.6
15
7
-
38.4
6.125
8
0.3 x VDD
0.6
15
57.6
12500
V
V
V
V
μs
ms
kbps
kbps
Bit
Acting as master
ADC resolution
-
10
Internal Reference
Voltage (VREF)
ADC Input Resistance
Notes:
1) Unless otherwise noted, all voltages are with respect to GND
2) High drive strength, Port I/O push-pull
Bit
1.68
-
V
5
-
k
Table 3-3: Module Interface Characteristics
iM871A_Datasheet, Wireless Solutions, v1.1
Page 8
Datasheet
Electrical Characteristics
WiMOD iM871A
3.4
RF Characteristics
3.4.1
Receiver RF Characteristics
T = 25°C, VDD = 3 V (typ.) if nothing else stated
Parameter
Frequency Range
Condition
g1 subband
g2 subband
Modulation Techniques
Sensitivity
Min
Typ.
868.0
868.7
-
Max
868.6
869.2
Unit
MHz
MHz
2-FSK
BER ≤ 1%
1 kbps, 2-FSK,
Deviation: ±30 kHz
-116
dBm
BER ≤ 1%
4.8 kbps, 2-FSK,
Deviation: ±7.2 kHz
-109.5
dBm
BER ≤ 1%
10 kbps, 2-FSK,
Deviation: ±20 kHz
-108
dBm
BER ≤ 1%
32.768 kbps, 2-FSK,
Deviation: ±80 kHz
-105.5
dBm
BER ≤ 1%
100 kbps, 2-FSK,
Deviation: ±80 kHz
-101
dBm
BER ≤ 1%
256 kbps, 2-FSK,
Deviation: ±120 kHz
-98
dBm
Notes:
1) The RF perfomance can be affected by the layout of the target board
2) Supporting RF datarates equal to 4.8, 32.768 and 100 kbps the iM871A can operate in all
modes of wireless m-Bus [2]
Table 3-4: Receiver RF Characteristics
iM871A_Datasheet, Wireless Solutions, v1.1
Page 9
Datasheet
Electrical Characteristics
WiMOD iM871A
3.4.2
Transmitter RF Characteristics
T = 25°C, VDD = 3 V (typ.) if nothing else stated
Parameter
Condition
Frequency Range
RF Output Power (Note 1)
g1 subband
g2 subband
VDD = 3.6 V
Min
868.0
868.7
+12.5
Typ.
+13
4.8
32.768
RF Data Rate
Modulation Techniques
Max
868.6
869.2
+14
Unit
MHz
MHz
dBm
kbps
kbps
100
2-FSK
±4.8..±7.2
kbps
±40..±80
kHz
kHz
Modulation Deviation
TX Frequency Variation
-20 to +70°C
ppm
±10
vs. Temperature
Notes:
1) Depends on output power settings of TRX register 0x6D. RF output power vary over
temperature and frequency
Table 3-5: Transmitter RF Characteristics
iM871A_Datasheet, Wireless Solutions, v1.1
Page 10
Datasheet
Module Package
WiMOD iM871A
4.
Module Package
In the following the iM871A module package is described. This description includes the
iM871A pinout as well as the modules dimensions. Furthermore a recommendation for a
suitable footprint is given, which should be used for further mounting on appropriate
carrier boards.
4.1
Pinout Description
Figure 4-1 depicts a description of the iM871A's pads on the bottom side. The figure
shows the module with its pinout in top view (left figure) and with the module viewed from
the bottom side. A detailed description of the individual pins can be found in Table 4-1.
Figure 4-1: Description of iM871A module pins in top (left) and bottom view (right)
PIN
PIN Name
1
P1
2
P2
3
P3
4
P4
5, 15, 17,
24 , 28
GND
6
P5
7
P6
8
P7
iM871A_Datasheet, Wireless Solutions, v1.1
PIN Type
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
Supply
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
Description
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
Analogue input
Ground connection
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
Analogue input
Page 11
Datasheet
Module Package
WiMOD iM871A
9
P8
D IN/OUT
A IN
10
PAV
NC
11/12/13
Reserved
14
P9
D IN/OUT
A IN
16
RF
A IN/OUT
18
P10
19
P11
20
P12
21
P13
22
P14
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
D IN/OUT
A IN
A GND
D IN/OUT
23
P15
Analogue GND for ADC
Digital input or output
Analogue input
A IN
Reference voltage input
A system reset will be
initiated by driving this pin
low for at least 15 μs.
25
IN/OUT
D IN/OUT
P16
Analogue input
A IN
IN
26
Digital input or output
Analogue input
This pin should be left
unconnected or tied to
GND
Pins for special testing
Digital input or output
Analogue input
External 50  port for
monostatic antenna
connection
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
Analogue input
Digital input or output
C2 Debug Interface (Clock
signal)
Digital input or output
C2 Debug Interface (Data
signal)
D IN/OUT
Digital input or output
A IN
Analogue input
Positive supply voltage Supply
D IN/OUT
27
P17
29
VDD
Table 4-1: iM871A Pinout Table
iM871A_Datasheet, Wireless Solutions, v1.1
Page 12
WiMOD iM871A
4.2
Datasheet
Module Package
Internal Module Connection Diagram
The iM871A is based on the Silicon Labs Si1002 single chip microcontroller with an
integrated RF transceiver for low power applications. The logical routing between the
iM871A pads and the Si1002-Chip is depicted in Figure 4-2. Excepting the
Si1002-signals P1.5 and P0.6, all pins Px.y can be used as configured by the appropriate
firmware.
Figure 4-2: Logical routing of the iM871A to the Si1002 single chip
Using the iM871A with special firmware, the Si1002 signal P1.5 should be used to control
the shutdown state of the transceiver. The signal nIRQ indicates special events of the
transceiver (interrupt signal), which is directly routed to the Si1002-pin P0.6.
iM871A_Datasheet, Wireless Solutions, v1.1
Page 13
Datasheet
Module Package
WiMOD iM871A
4.3
Module Dimensions
The outer dimensions of the iM871A are given by Figure 4-3 and Table 4-2. The left
figure shows the iM871A in top view, at the right side an overview of the pad arrangement
on the bottom side of the module is given. The weight of the iM871A is typically 0.9 g.
Figure 4-3: iM871A Package Drawing in top (left) and bottom view (right)
Dimension Min
Typ.
Max.
B
1.2
1.3
1.4
D
16.6
16.8
17.0
D1
15.1 BSC
D2
10.5 BSC
D3
8.4 BSC
e
2.1 BSC
E
18.4
18.6
18.8
E1
16.8 BSC
L
1.2
1.3
1.4
L1
0.3
L2
0.3
H
1.8
Notes:
1) All dimensions are in mm, unless otherwise noted
2) All pitches are represented by (e) unless otherwise noted
Table 4-2: Module Dimensions
iM871A_Datasheet, Wireless Solutions, v1.1
Page 14
Datasheet
Module Package
WiMOD iM871A
4.4
Recommended Footprint
According to Chapter 4.3, a recommendation for the footprint of the iM871A is given by
Figure 4-4 and Table 4-3.
23
24
29
1
E
29 x
15
10
14
Y
9
29 x
X
Figure 4-4: iM871A Package Drawing in top (left) and bottom view (right)
Dimension
C1
C2
C3
C4
E
X
Y
Value
15.1
10.5
16.8
8.4
2.1
1.3
1.3
Notes:
1) All dimensions are in mm unless otherwise noted
2) All pitches are represented by (E) unless otherwise noted
Table 4-3: Dimensions of the recommended land pattern
iM871A_Datasheet, Wireless Solutions, v1.1
Page 15
Datasheet
Module Interface Characteristics
WiMOD iM871A
5.
Module Interface Characteristics
5.1
Programming Interface
For updating the firmware of the iM871A, the module provides a special debug interface.
Programming of the iM871A requires the Silicon Laboratories USB Debug Adapter1, which
can be connected with a 10-pin ribbon cable to the target board.
Programming the iM871A using the debug adapter requires a connection as depicted in
to
Figure 5-1. Therefore signal P16 should be applied directly to pin 4 and signal
pin 7 of the programming adapter. The pins 2, 3 and 9 should be GND. All others should
be unconnected.
Figure 5-1: Connection of programming connector
5.2
Input / Output Ports
The iM871A provides up to 17 externally usable I/O ports (Px). These ports can be defined
as digital inputs or outputs, or analog inputs (except P16). All I/O ports are 5 V tolerant, if
used as digital input port or open drain output.
In dependency on the port configuration, the digital I/O ports can be assigned to special
digital functions such as digital communication interfaces, hardware timer, counter or
comparators.
The integrated 10-bit ADC can be used for converting applied analog signals to the
defined ports with up to 300 ksps.
1
For detailed information refer to http://www.silabs.com
iM871A_Datasheet, Wireless Solutions, v1.1
Page 16
WiMOD iM871A
5.3
Datasheet
Module Interface Characteristics
Communication Interfaces
As configured by the appropriate firmware, different communication interfaces are
available to use with the defined digital I/O ports. By using some of the following
interfaces, the number of useable I/O Ports respectively of analog inputs will decrease.
With the Serial Peripheral Interface (SPI) the iM871A is able to communicate with other
devices via 3-wire bus (SCK, MISO, MOSI). By using the additional NSS signal for
selecting master or slave mode, the iM871A is also able to work in 4-wire mode.
Next a Universal Asynchronous Receiver Transmitter (UART) is available to use. This
interface supports full duplex mode and is able to act in 8-bit or 9-bit operational mode.
With the SMBus I/O interface, the module supports two wire bi-directional serial bus
communication. The SMBus is compliant with the I²C serial bus and the System
Management Bus Specification (Version 1.1).
iM871A_Datasheet, Wireless Solutions, v1.1
Page 17
Datasheet
Integration Guide
WiMOD iM871A
6.
Integration Guide
The iM871A provides 29 pad on its bottom side as described in Chapter 4. For integrating
the iM871A into an environment, a typically circuit as given in Chapter 6.1 can be used.
While designing the PCB Layout, the recommendations of Chapter 6.2 should be applied,
as well as the recommendation for soldering in Chapter 6.3.
6.1
Typical Application Schematic
Figure 6-1: Schematic of an Example Application
Figure 6-1 shows a schematic of a typical application (e.g. Starter Kit Application). P10
and P11 are used as serial interface and must be connected to a host controller or to a
host PC (via a level converter).
P1, P3, P5 and P6 are used as outputs. It must be ensured that the total maximum DC
current is not exceeded. P4, P9 and P17 are used as digital inputs.
The RF interface of the module is matched to 50 . By using a 50  antenna, it can be
directly connected to module without any additional matching components. In other case,
it is recommended to use a special matching network.
iM871A_Datasheet, Wireless Solutions, v1.1
Page 18
Datasheet
Integration Guide
WiMOD iM871A
P16 and
can be used for updating and debugging the firmware of the iM871A as
described in chapter 5.1.
Optional 1: The iM871A is designed for a maximum ripple of the supply voltage of less
than 30 mV peak-to-peak. For stable operation mode, the voltage should be stabilized by
appropriate circuits and a parallel capacity minimum of 4.7 μF.
Optional 2: In accordance to ESD protection, which is required by R&TTE certification, the
usage of a ferrite bead is recommended.
6.2
PCB Design Recommendation
The Top Layer of the carrier board should be kept free of Tracks and Visa under the
iM871A because there are some test pads on the bottom side of the module which are not
covered by solder resist.
All GND pads of the module should be connected via low impedance path to GND.
The iM871A's RF Interface is already matched to 50 By using an adequate
50 antenna, no additional matching components are required1. For an ideal signal
transmission between the modules RF pad and the antenna, the transmission line should
be as short as possible and represent an impedance of 50 .
Note: Disregarding this recommendation can affect the RF performance
respective RF output power, sensitivity, and unwanted emissions.
This impedance depends on frequency and PCB structure. It is recommended to use a
grounded coplanar waveguide (CPWG) structure, to reduce effects of electromagnetic
fields. The impedance of transmission line for grounded CPWG is basically affected by
height H and material of the substrate, gap G between transmission line and ground on
the top layer, as well as width W and thickness T of the transmission lines (Figure 6-2).
Figure 6-2: Structure of a grounded CPWG
1
In other case a special matching network is required
iM871A_Datasheet, Wireless Solutions, v1.1
Page 19
Datasheet
Integration Guide
WiMOD iM871A
Assuming a frequency of approx. 868 MHz, FR4 (r≈4.8) as substrate material, copper as
conductor material, G = 0.4 mm and T = 35 μm, the width of transmission line is given
by Table 6-1.
H [mm]
1.0
1.6
W [mm]
1.37
1.85
Table 6-1: Recommended width of transmission line for CPWG and 868 MHz
6.3
Recommended Soldering Conditions
An example of the temperature profile for the soldering process of the iM871A is depicted
in Figure 6-3 with the corresponding values as given by Table 6-2. The temperature values
should not exceed the limits.
Figure 6-3: Soldering Profile
Phase
Pb-Free Conditions
Preheating
Primary heat
Peak
tPH = 120s
TPH = 160~180°C
t1 = 60s
T1 = 220°C
t2 = 10s (max)
T2 = 255°C
Table 6-2: Recommended Soldering Parameter for Temperature and Timing
Note: The quality of the soldering process depends on several parameters,
e.g. soldering paste, carrier board design, fabrication equipment,...
iM871A_Datasheet, Wireless Solutions, v1.1
Page 20
WiMOD iM871A
7.
Datasheet
Measurements
Measurements
Using the iM871A with appropriate firmware and configuration, different simple
measurements can be used to measure (RF) performance data of the module.
Configuring the iM871A's transceiver for transmitting a CW signal, the RF output power
level and the appendant current consumption can be measured.
Depending on the supply voltage of the iM871A and the configuration of the TX-Power
register (0x6D) of the Si1002 for different output power level, the results of Figure 7-1 can
be measured1.
Figure 7-1: Output Power of the iM871A vs. VDD for different TX-Power-Register settings
1
It is required to set the LNA_SW-Bit in transmit-mode
iM871A_Datasheet, Wireless Solutions, v1.1
Page 21
WiMOD iM871A
Datasheet
Measurements
While measuring the RF output power level, the current consumption can be obtained as
well. Therefore the μC should be set to standby mode. As depicted in Figure 7-2, the
iM871A current consumption is less than 38 mA while transmitting a CW with an output
power level up to +14 dBm.
Figure 7-2: Current consumption the iM871A vs. VDD for different TX-Power-Register settings
iM871A_Datasheet, Wireless Solutions, v1.1
Page 22
Datasheet
Ordering Information
WiMOD iM871A
8.
Ordering Information
Ordering Part Number
Description
Distributor
iM871A
Radio module iM871A
Starter Kit for the iM871A.
See Notes.
2x Adapter Board with
iM871A
wimod@imst.de
SK – iM871A
AB – iM871A
wimod@imst.de
wimod@imst.de
Notes:
The Starter Kit contains two Demo Boards, two Adapter Boards with iM871A, two antennas, and a CD or USB
memory stick with documentation.
Table 8-1: Ordering Information
iM871A_Datasheet, Wireless Solutions, v1.1
Page 23
WiMOD iM871A
9.
Datasheet
Appendix
Appendix
9.1
List of Abbreviations
ADC
Analog-to-Digital Converter
BER
Bit Error Rate
BSC
Basic Spacing Between Centers
CPWG
Coplanar Waveguide
CW
Continuous Wave
GND
Ground
GPIO
General Purpose Input/Output
I²C
Inter-Integrated Circuit
MCU
Microcontroller Unit
PCB
Printed Circuit Board
RAM
Random Access Memory
RF
Radio Frequency
SMBus
System Management Bus
SMT
Surface Mounted Technology
SPI
Serial Peripheral Interface
TRX
Transceiver
USB
Universal Serial Bus
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9.2
Datasheet
Appendix
List of Figures
Figure 1-1: Picture of iM871A .................................................................................... 4 Figure 2-1: Block Diagram of Radio Module iM871A ................................................... 5 Figure 4-1: Description of iM871A module pins in top (left) and bottom view (right) ....... 11 Figure 4-2: Logical routing of the iM871A to the Si1002 single chip ............................ 13 Figure 4-3: iM871A Package Drawing in top (left) and bottom view (right).................... 14 Figure 4-4: iM871A Package Drawing in top (left) and bottom view (right).................... 15 Figure 5-1: Connection of programming connector .................................................... 16 Figure 6-1: Schematic of an Example Application....................................................... 18 Figure 6-2: Structure of a grounded CPWG ............................................................... 19 Figure 6-3: Soldering Profile .................................................................................... 20 Figure 7-1: Output Power of the iM871A vs. VDD for different TX-Power-Register settings
......................................................................................................... 21 Figure 7-2: Current consumption the iM871A vs. VDD for different TX-Power-Register
settings .............................................................................................. 22 9.3
List of Tables
Table 3-1: Absolute Maximum Ratings ........................................................................ 6 Table 3-2: General Characteristics ............................................................................. 7 Table 3-3: Module Interface Characteristics ................................................................. 8 Table 3-4: Receiver RF Characteristics......................................................................... 9 Table 3-5: Transmitter RF Characteristics ................................................................... 10 Table 4-1: iM871A Pinout Table .............................................................................. 12 Table 4-2: Module Dimensions ................................................................................ 14 Table 4-3: Dimensions of the recommended land pattern ........................................... 15 Table 6-1: Recommended width of transmission line for CPWG and 868 MHz ............. 20 Table 6-1: Recommended Soldering Parameter for Temperature and Timing ................ 20 Table 8-1: Ordering Information .............................................................................. 23 9.4
References
[1]
iM871A Wireless M-Bus User Guide, 2011
[2]
EN13575-4 : 2005
Communication systems for meters and remote reading of meters
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Regulatory Compliance Information
10. Regulatory Compliance Information
The use of radio frequencies is limited by national regulations. The radio module has been
designed to comply with the European Union’s R&TTE (Radio & Telecommunications
Terminal Equipment) directive 1999/5/EC and can be used free of charge within the
European Union. Nevertheless, restrictions in terms of maximum allowed RF power or duty
cycle may apply.
The radio module has been designed to be embedded into other products (referred as
“final products”). According to the R&TTE directive, the declaration of compliance with
essential requirements of the R&TTE directive is within the responsibility of the manufacturer
of the final product. A declaration of conformity for the radio module is available from
IMST GmbH on request.
The applicable regulation requirements are subject to change. IMST GmbH does not take
any responsibility for the correctness and accuracy of the aforementioned information.
National laws and regulations, as well as their interpretation can vary with the country. In
case of uncertainty, it is recommended to contact either IMST’s accredited Test Center or
to consult the local authorities of the relevant countries.
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Important Notice
11. Important Notice
11.1 Disclaimer
IMST GmbH points out that all information in this document is given on an “as is” basis.
No guarantee, neither explicit nor implicit is given for the correctness at the time of
publication. IMST GmbH reserves all rights to make corrections, modifications,
enhancements, and other changes to its products and services at any time and to
discontinue any product or service without prior notice. It is recommended for customers to
refer to the latest relevant information before placing orders and to verify that such
information is current and complete. All products are sold and delivered subject to
“General Terms and Conditions” of IMST GmbH, supplied at the time of order
acknowledgment.
IMST GmbH assumes no liability for the use of its products and does not grant any licenses
for its patent rights or for any other of its intellectual property rights or third-party rights. It
is the customer’s duty to bear responsibility for compliance of systems or units in which
products from IMST GmbH are integrated with applicable legal regulations. Customers
should provide adequate design and operating safeguards to minimize the risks associated
with customer products and applications. The products are not approved for use in life
supporting systems or other systems whose malfunction could result in personal injury to
the user. Customers using the products within such applications do so at their own risk.
Any reproduction of information in datasheets of IMST GmbH is permissible only if
reproduction is without alteration and is accompanied by all given associated warranties,
conditions, limitations, and notices. Any resale of IMST GmbH products or services with
statements different from or beyond the parameters stated by IMST GmbH for that
product/solution or service is not allowed and voids all express and any implied
warranties. The limitations on liability in favor of IMST GmbH shall also affect its
employees, executive personnel and bodies in the same way. IMST GmbH is not
responsible or liable for any such wrong statements.
Copyright © 2011, IMST GmbH
11.2 Contact Information
IMST GmbH
Carl-Friedrich-Gauss-Str. 2-4
47475 Kamp-Lintfort
Germany
T +49 2842 981 0
F +49 2842 981 299
E wimod@imst.de
I www.wireless-solutions.de
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