Measurement Computing USB-1608GX-2AO - Manual (Page 16)

16
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 Successive approximation
ADC resolution 16 bits
Number of channels 8 differential, 16 single-ended
Software-selectable
Input voltage range ±10 V, ±5 V, ±2 V, ±1 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)
 820 Ω (power off)
Input bias current ±10 nA
Input bandwidth All input ranges,
small signal (–3 dB) 870 kHz
Input capacitance 60 pf
Max working voltage (signal
+ common mode) ±10V range ±10.2 V max relative to AGND
±5V range ±10.2 V max relative to AGND
±2V range ±9.5 V max relative to AGND
±1V range ±9.0 V max relative to AGND
Common mode rejection ratio (f
IN
= 60 Hz, all input
ranges)
86 dB
Crosstalk Adjacent differential mode
channels, DC to 100 kHz –75 dB
Input coupling DC
Sampling rate 0.0149 Hz to 500 kHz; software-selectable
Trigger source TRIG (see External trigger on page 19)
Sample clock source Internal A/D clock or external A/D clock (AICKI pin)
Burst mode 2 µs
Software-selectable using the internal A/D clock; always
enabled when using the external clock (AICKI pin).
Throughput Software paced 33 to 4000 S/s typ, system dependent
Hardware paced 500 kS/s max
Channel gain queue Up to 16 elements Software-selectable range for each channel
Warm-up time 15 minutes min