Specifications; Analog Input; Accuracy - Measurement Computing PC-CARD DAS16AO User Manual

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog input

A/D converter type
Resolution
Number of channels
Input ranges
A/D pacing
(software programmable)
A/D trigger sources
A/D triggering modes
A/D gate sources
Burst mode
Data transfer
A/D conversion time
Calibrated throughput
Calibration

Accuracy

Accuracies are listed for a 200 kHz sampling rate, single channel operation, a 60 minute warm-up, and
operational temperatures within ±2 °C of internal calibration temperature. The calibrator test source high side is
tied to Channel 0 In, and the low side tied to AGND.
Range
±10.00 V
±5.000 V
±2.500 V
±1.250 V
Each PC-CARD-DAS16/16AO is tested at the factory to assure the board's overall error does not exceed
accuracy limits described in Table 2.
Table 1. Analog input specifications
AD976A
16 bits
16 single-ended / 8 differential, software selectable
±10 V, ±5 V, ±2.5 V, ±1.25 V, software programmable
Internal counter - 82C54
External source - A/D External Pacer, software programmable for rising or
falling edge
Software polled
External edge trigger (A/D External Trigger)
Rising or falling edge trigger - software selectable
A/D External Trigger, gate high or low, software selectable
A/D Pacer Gate, gate high
Software selectable option, burst rate = 100 kHz
From 4 k sample FIFO via REPINSW
Programmed I/O
5 µs max
200 kHz single channel, 100 kHz multiple channel. Minimum
system requirement is Pentium II, 400 MHz.
Auto-calibration, calibration factors for each range stored on board in nonvolatile
RAM
Table 2. Absolute Accuracy specifications
Absolute accuracy
±5.0 LSB max
±5.0 LSB max
±5.0 LSB max
±5.0 LSB max
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Chapter 5