Measurement Computing PCI-DAS1001 - Manual (Page 17)

16
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 7800
Resolution 12 bits
Number of channels 8 differential or 16 single-ended, software selectable
Input ranges ±10 V, ±1 V, ±0.1 V, ±0.01 V, 0 to 10 V, 0 to 1 V, 0 to 0.1 V, 0 to 0.01 V.
Fully programmable
Polarity Unipolar/bipolar, software selectable
A/D pacing Programmable: internal counter or external source (A/D External Pacer, positive or
negative edge selectable by software), or software polled
Burst mode Software selectable option, rate = 6.67µs
A/D trigger sources External digital (A/D External Trigger)
A/D triggering modes Digital: Software enabled, rising edge, hardware trigger
Pre-trigger: Unlimited pre- and post-trigger samples. Total # of samples must
be > 512.
Data transfer From 1024 sample FIFO via REPINSW, interrupt or software polled
A/D conversion time 3 µs
Throughput 150 kHz
Relative accuracy ±1.5 LSB
Differential linearity error ±0.75 LSB
Integral linearity error ±0.5 LSB typ, ±1.5 LSB max
Gain error (relative to
calibration reference) 0.01 V range: ± 0.4% of reading, max
All other ranges: ± 0.02% of reading, max
No missing codes guaranteed 12 bits
Calibration Auto-calibration, calibration factors for each range stored on board in non-volatile
RAM
Gain drift (A/D specs) ±6 ppm/°C
Zero drift (A/D specs) ±1 ppm/°C
Common mode range ±10 V
CMRR @ 60 Hz 70 dB
Input leakage current 200 nA
Input impedance 10 MOhms, min
Absolute maximum input
voltage ±35 V
Noise distribution Rate = 1-150 kHz, average # bins
10 V ranges: 3 bins
1 V ranges: 4 bins
0.1 V ranges: 10 bins
Bipolar 0.01 V range: 20 bins
Unipolar 0.01 V range: 32 bins