System Throughput; Crosstalk; Analog Input Drift - Measurement Computing PCI-DAS6402/16 User Manual

PCI-DAS6402/16 User's Guide

System throughput

Condition
1. Single channel, single input range.
2. Multiple channel, single input range
3. Single channel, multiple input ranges. All
samples in unipolar OR bipolar mode.
4. Multiple channels, multiple input ranges.
All samples in unipolar OR bipolar mode.
5. Multiple channels, multiple input ranges,
switching Unipolar/bipolar mode
6. Multiple channel, single input range,
switching Unipolar/bipolar mode.
For conditions 1-2 above, specified accuracy is maintained at rated throughput. Conditions 3-6
Note 1:
apply calibration coefficients which correspond to the range value selected in
These coefficients remain unchanged throughout the scan. Errors of up to 25 counts may be
incurred when switching gains while in bipolar or unipolar mode only (conditions 3 and 4).
Errors of up to 100 counts may be incurred when mixing unipolar/bipolar modes (conditions 5
and 6).

Crosstalk

Crosstalk is defined here as the influence of one channel upon another when scanning two channels at the
maximum rate. A full scale 100 Hz triangle wave is input on Channel 1; Channel 0 is tied to Analog Ground at
the 100 pin user connector. The table below summarizes the influence of Channel 1 on Channel 0 with the
effects of noise removed. The residue on Channel zero is described in LSBs.
Condition
Same range to same range
Any range to any range

Analog input drift

Analog input full-scale gain drift
Analog input zero drift
Overall analog input drift
Common mode range
CMRR @ 60 Hz
Input impedance
Absolute maximum input voltage
Warm-up time
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Table 4. System throughput specifications
Calibration coefficients
Per specified range
Per specified range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Default to value for cbAInScan() range
Table 5. Crosstalk specifications
Crosstalk Per channel rate
3 LSB pk-pk 100 kHz
6 LSB pk-pk 100 kHz
Table 6. Analog input drift specifications
0.25 LSB/°C max
0.21 LSB/°C max
0.46 LSB/°C max
±10 V
-80 dB min
10 MegOhm min
! Channel 0: ±15 V, power on or off
! Channels 1-63: –40 V to +55 V, power on or off
60 minutes
5-3
Specifications
ADC rate (max)
200 kHz
200 kHz
200 kHz
200 kHz
200 kHz
200 kHz
.
cbAInScan()
ADC rate
200 kHz
200 kHz