Measurement Computing PC-CARD-DAS16/330 - Manual (Page 21)

PC-CARD-DAS16/330 User's Guide Specifications
As shown in Tab , total board error is a combination of gain, offset, differential linearity and integral
linearity error. The theoretical worst-case error of the board may be calculated by summing these component
errors. Worst case errors are realized only in the unlikely event that each of the component errors are at their
maximum level, and causing error in the same direction.
le 3
Analog input full-scale gain drift ±0.66 LSB/°C max
Analog input zero drift ±0.61 LSB/°C max
Overall analog input drift ±1.27 LSB/°C max
Input leakage current ±20 nA max
Input impedance 10 MOhms min
Absolute maximum input voltage ±30 V
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
connector.
summarizes the influence of channel 1 on channel 0 with the effects of noise removed. The
residue on channel zero is described in LSB's.
Table 4
Table 4. Channel to channel crosstalk specifications
Condition Crosstalk Per channel rate ADC rate
All ranges 1LSB
pk-pk
165 kS/s 330 kS/s
Noise Performance
Table 5
Table 5. Noise performance specifications
summarizes the noise performance for the PC-CARD-DAS16/330. Noise distribution is determined by
gathering 50 k samples at 330 kS/s with inputs tied to ground at the user connector.
Range % within ±2 LSBs % within ±1 LSB Typical LSBrms* Max LSBrms*
All ranges 100% 90% 0.60 0.90
* RMS noise is defined as the peak-to-peak bin spread divided by 6.6.
Digital input/output
Table 6. Digital I/O specifications
Digital type FPGA
Number of I/O 8
Configuration Two ports, four bits each. Programmable as 8 input, 8 output, or 4 input
and 4 output
Input low voltage 0.8 V max
Input high voltage 2.0 V min
Output low voltage (IOL = 4 mA) 0.32 V max
Output high voltage (IOH = -4 mA) 3.86 V min
Absolute maximum input voltage -0.5 V , +5.5 V
Power-up / reset state Input mode (high impedance)
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