Measurement Computing PCI-DAS6023 - Manual (Page 33)

PCI-DAS6023 and PCI-DAS6025 User's Guide Specifications
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Parametrics
Table 7. Parametrics specifications
Maximum working voltage
(signal + common-mode)
Input must remain within ±11 V of ground
CMRR @ 60 Hz ±10 V: 85 dB
±5 V: 85 dB
±500 mV: 90 dB
±50 mV: 90 dB
Small signal bandwidth, all ranges 500 kHz
Large signal bandwidth, all ranges 225 kHz
Input coupling DC
Input impedance 100 GOhm in normal operation.
Min 10 MOhm in powered off or overload condition.
Input bias current ±200 pA
Input offset current ±100 pA
Absolute maximum input voltage –40 V to +55 V, power on or off. Protected inputs:

CH<15:0> IN
 AISENSE
Crosstalk Adjacent channels: -60 dB
All other channels: -80 dB
Noise performance
Table 8 summarizes the noise performance for the PCI-DAS6025, PCI-DAS6023. Noise distribution is
determined by gathering 50 K samples with inputs tied to ground at the user connector. Samples are gathered at
the maximum specified single-channel sampling rate. Specification applies to both single-ended and differential
modes of operation.
Table 8. Analog input noise performance (not including quantization)
Range Typical Counts
Dithered
LSBrms
Dithered
Typical Counts
Undithered
LSBrms
Undithered
±10 V 4 0.6 2 0.1
±5 V 4 0.6 2 0.1
±500 mV 4 0.6 3 0.1
±50 mV 7 0.8 4 0.7