Specifications - Measurement Computing USB-1208LS User Manual

Specifications

Typical for 25°C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
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)
Input impedance
Number of channels
Input ranges, single-ended mode
Input ranges, differential mode
Throughput
Channel gain queue
Resolution (Note 2)
CAL accuracy
Integral linearity error
Differential linearity error
Repeatability
CAL current
Trigger Source
Input current is a function of applied voltage on the analog input channels. For a given input
Note 1:
voltage, Vin, the input leakage is approximately equal to (8.181*Vin-12) µA.
The AD7870 converter only returns 11-bits (0-2047 codes) in single-ended mode.
Note 2:
Conditions Specification
Successive approximation type
CHx to GND ±10 V max
CHx to GND -10 V min, +20 V max
CHx to GND ±40V max
Vin = +10 V 70µA typ
Vin = 0V -12µA typ
Vin = -10 V -94µA typ
122K Ohms
8 single ended / 4 differential, software
selectable
±10V, G=2
±20V, G=1
±10V, G=2
±5V,
±4V,
±2.5V, G=8
±2.0V, G=10
±1.25V, G=16
±1.0V, G=20
Software selectable
Software paced 50 S/s
Continuous scan 1.2 kS/s
Burst scan to 4 K 8 kS/s
sample FIFO
Up to 8 elements Software configurable channel, range, and gain.
Differential 12 bits, no missing codes
Single ended 11 bits
CAL = 2.5V ±0.05% typ, ±0.25% max
±1 LSB typ
±0.5 LSB typ
±1 LSB typ
Source 5 mA max
Sink 20 µA min, 200 nA typ
Software selectable External digital: TRIG_IN
4-1
Chapter 4
G=4
G=5