Omega OM-USB-1208FS User Manual
22
Chapter 4
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
Table 1. Analog input specifications
Parameter
Conditions
Specification
A/D converter type
Successive approximation type
Input voltage range for linear operation,
single-ended mode
single-ended mode
CHx to GND
±10 volts (V) max
Input common-mode voltage range for linear
operation, differential mode
operation, differential mode
CHx to GND
-10 V min, +20 V max
Absolute maximum input voltage
CHx to GND
±28 V max
Input impedance
122KOhm
Input current (Note 1)
Vin = +10 V
70 microamperes (µA) typ
Vin = 0 V
-12 µA typ
Vin = -10 V
-94 µA typ
Number of channels
8 single-ended / 4 differential, software
selectable
selectable
Input ranges, single-ended mode
±10 V, G=2
Input ranges, differential mode
±20 V, G=1
±10 V, G=2
±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
Throughput (Note 2)
Software paced
250 samples per second (S/s) typ,
PC-dependent
PC-dependent
Continuous scan
50 kilosamples per second (kS/s)
Channel gain queue
Up to 16 elements
Software configurable channel, range, and
gain.
gain.
Resolution (Note 3)
Differential
12 bits, no missing codes
Single-ended
11 bits
CAL accuracy
CAL = 2.5 V
±36.25 mV max
Integral linearity error
±1 least significant bit (LSB) typ
Differential linearity error
±0.5 LSB typ
Repeatability
±1 LSB typ
CAL current
Source
5 milliamperes (mA) max
Sink
20 µA min, 100 µA typ
Trigger source
Software selectable
External digital: TRIG_IN
Pacer source
Software selectable
Internal
External (SYNC), rising edge triggered
Programmed IO