Measurement Computing PCI-DAS4020/12 - Manual (Page 25)

PCI-DAS4020/12 User's Guide Specifications
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Accuracy
Table 9. Analog output accuracy specifications
Absolute accuracy ±13 LSB max
Offset error ±6 LSB max
Gain error ±5 LSB max
Differential non-linearity ±1 LSB max
Integral non-linearity ±1 LSB max
Total analog output error is a combination of gain, offset, integral linearity, and differential linearity error. The
overall absolute 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 both at their maximum
level, and causing error in the same direction. Though this is very uncommon, it is still possible.
Digital input / output
Table 10. DIO specifications
Digital type (40-pin connector) 8255A
Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output
Number of channels 24 I/O
Output high 3.0 volts min @ 2.5 mA
Output low 0.4 volts max @ 2.5 mA
Input high 2.0 volts min, Vcc + 0.5 volts absolute max
Input low 0.8 volts max, GND 0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Interrupts
Table 11. Interrupt specifications
Interrupts INTA# - mapped to IRQn via PCI BIOS at boot-time
Interrupt enable Software programmable
ADC Interrupt sources DAQ_ACTIVE: Interrupt is generated when a DAQ sequence is active.
DAQ_STOP: Interrupt is generated when A/D Stop Trigger In is detected.
DAQ_DONE: Interrupt is generated when a DAQ sequence completes.
DAQ_FIFO_1/2_FULL:
Interrupt is generated when ADC FIFO is ½ full.
DAQ_SINGLE: Interrupt is generated after each conversion completes.
External Interrupt is generated via edge-sensitive transition on the Interrupt In pin on the
40-pin connector. Rising/falling edge polarity selection. The Interrupt In pin is pulled
up to 5 V through a 10 K resistor.
External Interrupt Enable Active low Interrupt Enable signal on the 40-pin connector. The Interrupt Enable pin
is pulled up to 5 V through a 10 K resistor.
Environmental
Table 12. Environmental specifications
Operating temperature range 0 to 70 °C
Storage temperature range 40 to 100 °C
Humidity 0 to 90% non-condensing