Specifications; Analog Input - Measurement Computing USB-7204 User Manual

Specifications

All specifications are subject to change without notice.
Typical for 25°C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog input

Parameter
A/D converter type
Input modes
Input voltage range for linear
operation, single-ended mode
Input common-mode voltage range
for linear operation, differential
mode
Absolute maximum input voltage
Input impedance
Input current (Note 1)
Number of channels
Configuration
Sampling method
Input ranges, single-ended mode
Input ranges, differential mode
Throughput (Note 2)
Channel gain queue
Resolution (Note 3)
Integral linearity error
Differential linearity error
Repeatability
Trigger source
Pacer source
Table 1. Analog input specifications
Conditions
CHx to GND
CHx to GND
CHx to GND
Vin = +10 V
Vin = 0 V
Vin = –10 V
Software paced
Scan to system memory
Up to 16 elements
Differential
Single-ended
Software-selectable
Software-selectable
21
Specification
Successive approximation type
Single-ended or differential (default)
±10 volts (V) max
–10 V min, +20 V max
±28 V max
122 kΩ
70 microamperes (µA) typ
–12 µA typ
–94 µA typ
8 single-ended / 4 differential, software-selectable
Single A/D
Multiplexed
±10 V G=2
±20 V G=1
±10 V G=2 (default)
±5 V G=4
±4 V G=5
±2.5 V G=8
±2.0 V G=10
±1.25 V G=16
±1.0 V G=20
Software-selectable
250 samples per second (S/s) typ, system dependent
0.596 to 50,000 S/s
Software-selectable channel, range.
12 bits, no missing codes
11 bits
±1 least significant bit (LSB) typ
±0.5 LSB typ
±1 LSB typ
External digital: TRIG_IN
 Internal
 External (SYNC), rising edge triggered
 External Gated (SYNC), see Note 4
 Programmed IO
Chapter 4