Measurement Computing PCI-DAS1002 - Manual (Page 18)

18
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Parameter Specification
A/D converter type ADS7800 or equivalent
Resolution 12 bits
Number of channels 16 single-ended / 8 differential, software selectable
Input ranges ±10 V, ±5 V, ±2.5 V, ±1.25 V, 0 to 10 V, 0 to 5V, 0 to 2.5 V, 0 to 1.25 V software
programmable
A/D pacing
(software programmable)
Internal counter - 82C54.
External source (A/D External Pacer)
software programmable for rising or falling edge
Software polled
A/D trigger sources External edge trigger (A/D EXTERNAL TRIGGER)
A/D triggering modes Rising edge trigger
A/D pre-trigger mode Unlimited pre- and post-trigger samples. Total number of samples must be greater than
512.
Burst mode Software selectable option, burst rate = 150 kHz
Data transfer From 1024 sample FIFO via REPINSW
Programmed I/O
A/D conversion time 3 µs max
Analog front end settling time 6 µs for a full scale step to 1 LSB
Calibrated throughput 200 kHz
Calibration Auto-calibration, calibration factors for each range stored on board in nonvolatile RAM
A/D full-scale gain drift ±0.25 LSB/°C max
A/D zero drift ±0.25 LSB/°C max
Common mode range ±10 V min
CMRR @ 60 Hz -70 dB min
Input leakage current ±20 nA max
Input impedance 10 MOhms min
Absolute maximum input
voltage ±35 volts
Warm-up time 15 minutes