Measurement Computing USB-1608FS - Manual (Page 19)

19
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 Condition Specification
A/D converter type 16-bit successive approximation type
Number of channels 8 single-ended
Input configuration Individual A/D per channel
Sampling method Simultaneous
Absolute maximum input voltage CHx IN to GND ±15 V max
Input impedance 100 M
Ω, min
Input ranges Software-selectable ±10 V, ±5 V, ±2 V, ±1 V
Sampling rate Scan to PC memory 0.6 S/s to 50 kS/s, software-selectable
Burst scan to 32 k sample FIFO 20 S/s to 50 kS/s, software- selectable
Throughput Software paced 500 S/s all channels
Hardware paced (Note 1) (100 kS/s) / (# of channels),
50 kS/s max for any channel
BURSTIO
≤ 32,768 total samples
(uses onboard FIFO)
(200 kS/s) / (# of channels),
50 kS/s max for any channel
Gain queue Software configurable..
Eight unique, consecutive elements – one gain
element per channel.
Resolution 16 bits
No missing codes 15 bits
Crosstalk Signal DC to 25 kHz –80 dB
CAL output User calibration source 0.625 V, 1.25 V, 2.5 V, 5.0 V,
software-selectable
CAL output accuracy (Note 2) ±0.5% typ, ±1.0% max
CAL current ±5 mA max
Trigger source Software-selectable External digital: TRIG_IN
Note 1: Maximum throughput when scanning in hardware paced mode is machine dependent.
Note 2: Actual values used for calibration are measured and stored in EEPROM.
Table 2. Calibrated absolute accuracy
Range Accuracy (mV)
±10 V 5.66
±5 V 2.98
±2 V 1.31
±1 V 0.68