MCC USB-1808X: High-Speed, High-Precision, Simultaneous USB DAQ Device - User Guide

18
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. General analog input specifications
Parameter Condition Specification
A/D converter type
Simultaneous
ADC resolution
18 bits
Number of channels
8 differential (DIFF), 8 single-ended (SE);
software-selectable per-channel for SE or DIFF
Input voltage range
±10 V, ±5 V, 0 V to 10 V, 0 V to 5 V
Software-selectable per channel
Absolute max input voltage
CHx relative to AGND

±25 V max (power on)

±15 V max (power off)
Input impedance

>1 GΩ (power on)

1000 Ω (power off)
Input bias current
±50 pA
Input bandwidth All input ranges, small signal
(–3 dB)
2.0 MHz
Input capacitance
50 pf
Common mode voltage
range
±10 V range ±10.1 V
±5 V range
±10.1 V
0 V to 10 V range
±10.1 V
0 V to 5 V range
±10.1 V
Common mode rejection
ratio
f
IN
≤ 1 kHz, all input ranges
90 dB
Crosstalk
±10 V, adjacent channels,
DC to 100 kHz
–95 dB
Input coupling
DC
Sample rate
0.023 Hz to 200 kHz; software-selectable
Scan clock source
Internal input scan clock or external input scan
clock (ICLKI pin)
Trigger source

ITRIG (see External trigger on page 24)
 Digital pattern detection (see Pattern trigger on
page 24)
Channel gain queue Up to 8 elements Software-selectable. Queue list may contain up to
eight elements of unique, consecutive channels
paired with any valid range.
Warm-up time
15 minutes min