Measurement Computing PCI-DAS1602/12 - Manual (Page 25)

PCI-DAS1602/12 User's Guide Specifications
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Table 8. Accuracy components (errors in LSBs)
Range Gain Error (LSB) Offset Error (LSB) DLE (LSB) ILE (LSB)
±10 V ±2.0 max ±0.1 max ±1.0 max ±1.0 max
±5 V ±2.0 max ±0.2 max ±1.0 max ±1.0 max
0 to +10 V ±2.0 max ±0.2 max ±1.0 max ±1.0 max
0 to +5 V ±2.0 max ±0.4 max ±1.0 max ±1.0 max
Each PCI-DAS1602/12 is tested at the factory to assure the board’s overall error does not exceed ±3.0 LSB.
Total board error is a combination of gain, offset, integral linearity and differential linearity error. The
theoretical worst-case error of the board may be calculated by summing these component errors. Worst case
error is realized only in the unlikely event that each of the component errors are at their maximum level, and
causing error in the same direction. Although an examination of the chart and a summation of the maximum
theoretical errors shows that the board could theoretically exhibit a ±4.4 LSB error, our testing assures this
error is never realized in a board that we ship.
Analog output pacing and triggering
Table 9. Analog output pacing and triggering specifications
D/A pacing
(SW programmable)
Internal counter
External source (D/A EXTERNAL PACER)
Software paced
D/A trigger Modes External digital (EXTERNAL D/A PACER GATE)
Software triggered
Data transfer From 1024 sample FIFO via REPOUTSW mode. Data interleaved for dual analog output mode.
Programmed I/O
Update DACs individually or simultaneously (SW selectable)
Throughput 250 KHz max per channel, 2 channels simultaneous
Digital input/output
Table 10. Digital input/output specifications
Digital type 82C55
Number of I/O 24 (FIRSTPORTA Bit 0 through FIRSTPORTC Bit 7)
Configuration 2 banks of 8 and 2 banks of 4 or
3 banks of 8 or
2 banks of 8 with handshake
Input high voltage 2.0 V min, 5.5 V absolute max
Input low voltage 0.8 V max, –0.5 V absolute min
Output high voltage
(IOH = -2.5 mA) 3.0 V min
Output low voltage
(IOL = 2.5 mA)
0.4 V max
Power-up / reset state Input mode (high impedance)