Specifications

Specifications
Specifications
PMD-1208LS
Document Revision 1.1, June, 2003
© Copyright 2003, Measurement Computing Corporation
Specifications
Typical for 25 °C unless otherwise specified.
Analog input section
Parameter
A/D converter type
Input voltage range for linear
operation, Single Ended Mode
Input common-mode voltage
range for linear operation,
Differential Mode
Absolute maximum input
voltage
Input current (Note 1)
Conditions
Successive Approximation type
CHx to GND
±10V max
CHx to GND
-10V min, +20V max
CHx to GND
±40V max
Vin = +10V
Vin = 0V
Vin = -10V
70µA typ
-12µA typ
-94µA typ
8 single ended / 4 differential,
software selectable
Number of channels
Input ranges, Single Ended
Mode
±10V, G=2
Input ranges, Differential
Mode
Throughput
Channel Gain Queue
Resolution (Note 2)
CAL Accuracy
Integral Linearity Error
Differential Linearity Error
Repeatability
Specification
Software paced
Continuous scan:
1,2 or 4 channels
Burst scan: 1, 2 or 4
channels to 4K sample
FIFO
Up to 8 elements
Differential
Single ended
CAL = 2.5V
1
±20V, G=1
±10V, G=2
±5V,
G=4
±4V,
G=5
±2.5V, G=8
±2.0V, G=10
±1.25V, G=16
±1.0V, G=20
Software selectable
50 S/s
1.2kS/s
8kS/s
Software configurable channel,
range, and gain.
12 bits, no missing codes
11 bits
±0.05% typ, ±0.25% max
±1 LSB typ
±0.5 LSB typ
±1 LSB typ
Specifications
PMD-1208LS
Parameter
CAL current
Trigger Source
Conditions
Specification
Source
Sink
Software selectable
5mA max
20µA min, 200nA typ
External Digital: TRIG_IN
Note 1: Input current is a function of applied voltage on the analog input channels. For a
given input voltage, Vin, the input leakage is approximately equal to (8.181*Vin-12) µA
Note 2: The AD7870 converter only returns 11-bits (0-2047 codes) in single-ended
mode.
Table 1. Accuracy, Differential Mode
Range
Accuracy (LSB)
±20V
±10V
±5V
±4V
±2.5V
±2V
±1.25V
±1V
5.1
6.1
8.1
9.1
12.1
14.1
20.1
24.1
Table 2. Accuracy, Single-Ended Mode
Range
Accuracy (LSB)
±10V
4.0
Table 3. Accuracy Components, Differential Mode - All values are (±)
Range
% of
Reading
Gain Error
at FS (mV)
Offset (mV)
Accuracy at FS
(mV)
±20V
±10V
±5V
±4V
±2.5V
±2V
±1.25V
±1V
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
40
20
10
8
5
4
2.5
2
9.766
9.766
9.766
9.766
9.766
9.766
9.766
9.766
49.766
29.766
19.766
17.766
14.766
13.766
12.266
11.766
Table 4. Accuracy Components, Single-Ended Mode - All values are (±)
Range
% of
Reading
Gain Error
at FS (mV)
Offset (mV)
Accuracy at FS
(mV)
±10V
0.2
20
19.531
39.531
2
Specifications
PMD-1208LS
Analog output section
Parameter
Conditions
D/A converter type
Resolution
Maximum output range
Number of channels
Throughput
Software paced
Power on and reset voltage
No Load
1mA Load
5mA Load
Each D/A OUT
Maximum voltage (Note 3)
Output drive
Slew rate
Specification
PWM
10-bits, 1 in 1024
0 -5 Volts
2 voltage output
100 S/s single channel mode
50 S/s dual channel mode
Initializes to 000h code
Vs
0.99*Vs
0.98*Vs
30mA
0.14V/mS typ
Note 3: Vs is the USB bus +5V power. The maximum analog output voltage is equal to
Vs at no-load. V is system dependent and may be less than 5 volts.
Digital input/output
Digital type
Number of I/O
Configuration
Pull up/pull-down configuration
Input high voltage
Input low voltage
Output high voltage (IOH = -2.5mA)
Output low voltage (IOL = 2.5mA)
82C55
16 (Port A0 through A7, Port B0 through B7)
2 banks of 8
All pins pulled up to Vs via 47K resistors
(default). Positions available for pull down to
ground. Hardware selectable via zero ohm
resistors as a factory option.
2.0V min, 5.5V absolute max
0.8V max, –0.5V absolute min
3.0V min
0.4V max
External trigger
Parameter
Conditions
Specification
Trigger Source (Note 4)
External Digital
Trigger mode
Software selectable
Trigger latency
Trigger pulse width
Input high voltage
Input low voltage
Input leakage current
Burst
Burst
TRIG_IN
Level Sensitive: user configurable
for TTL level high or low input.
25µs min, 50µs max
40µs min
3.0V min, 15.0V absolute max
0.8V max
±1.0µA
Note 4: TRIG_IN is protected with a 1.5KOhm series resistor.
3
Specifications
PMD-1208LS
Counter section
Counter type
Number of Channels
Input source
Resolution
Schmidt Trigger Hysteresis
Input Leakage Current
Maximum input frequency
High pulse width
Low pulse width
Input low voltage
Input high voltage
Event counter
1
CTR screw terminal
32 bits
20mV to 100mV
±1µA
1 MHz
500ns min
500ns min
0V min, 1.0V max
4.0V min, 15.0V max
Non-volatile memory
Memory size
Memory configuration
8192 bytes
Address Range
Access
Description
0x0000 – 0x17FF
0x1800 – 0x1EFF
0x1F00 – 0x1FEF
0x1FF0 – 0x1FFF
Read/Write
Read/Write
Read/Write
Read/Write
A/D Data (4K samples)
User data area
Calibration Data
System Data
Power
Parameter
Supply Current
(Note 5)
+5V USB power
available (Note 6)
Output Current
(Note 7)
Conditions
Specification
20mA
Connected to Self-Powered Hub
Connected to Bus-Powered Hub
Connected to Self-Powered Hub
Connected to Bus-Powered Hub
4.5V min, 5.25V max
4.1V min, 5.25V max
450mA min, 500mA max
50mA min, 100mA max
Note 5: This is the total current requirement for the PMD-1208LS, which includes up to
5mA for the status LED.
Note 6: Self-powered refers to USB hubs and hosts with a power supply. Bus-powered
refers to USB hubs and hosts without their own power supply.
Note 7: This refers to the total amount of current that can be sourced from the USB +5V,
analog outputs and digital outputs.
4
Specifications
PMD-1208LS
General
Parameter
Conditions
Specification
USB Controller Clock Error
25 °C
0 to 70 °C
-40 to 85 °C
±30 ppm max
±50 ppm max
±100 ppm max
USB 1.1 low-speed
USB 1.1, USB 2.0
Device type
Device compatibility
Environmental
Operating Temperature Range
Storage Temperature Range
Humidity
-40 to 85 °C
-40 to 85 °C
0 to 90% non-condensing
Mechanical
Dimensions
USB Cable Length
User Connection Length
79mm(L) x 82mm(W) x 25mm(H)
3 Meters max
3 Meters max
Main connector and pin out
Connector type
Wire gauge range
Screw Terminal
16 AWG to 30 AWG
4-channel differential mode
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal Name
CH0 IN HI
CH0 IN LO
GND
CH1 IN HI
CH1 IN LO
GND
CH2 IN HI
CH2 IN LO
GND
CH3 IN HI
CH3 IN LO
GND
D/A OUT 0
D/A OUT 1
GND
CAL
GND
TRIG_IN
GND
CTR
Pin
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
5
Signal Name
Port A0
Port A1
Port A2
Port A3
Port A4
Port A5
Port A6
Port A7
GND
PC+5V
GND
Port B0
Port B1
Port B2
Port B3
Port B4
Port B5
Port B6
Port B7
GND
Specifications
PMD-1208LS
8-channel single-ended mode
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal Name
CH0 IN
CH1 IN
GND
CH2 IN
CH3 IN
GND
CH4 IN
CH5 IN
GND
CH6 IN
CH7 IN
GND
D/A OUT 0
D/A OUT 1
GND
CAL
GND
TRIG_IN
GND
CTR
Pin
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
6
Signal Name
Port A0
Port A1
Port A2
Port A3
Port A4
Port A5
Port A6
Port A7
GND
PC+5V
GND
Port B0
Port B1
Port B2
Port B3
Port B4
Port B5
Port B6
Port B7
GND
Measurement Computing Corporation
16 Commerce Boulevard
Middleboro, Massachusetts 02346
(508) 946-5100
Fax: (508) 946-9500
E-mail: [email protected]
www.measurementcomputing.com
PMD-1208LS-spec.doc
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