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8.2 ANALOG OUTPUT
D/A type AD7847AR
Resolution 12 bits
Number of channels 2
Output Ranges ±10V, ±5V, 0-5V, 0-10V. Each channel independently programmable.
D/A pacing Software
Data transfer Programmed I/O.
Offset error ±600µV max, all ranges (calibrated)
Gain error ±0.02% FSR max (calibrated)
Differential nonlinearity ±1LSB max
Integral nonlinearity ±1LSB max
Monotonicity 12 bits
D/A Gain drift ±2 ppm/°C max
D/A Bipolar offset drift ±5 ppm/°C max
D/A Unipolar offset drift ±5 ppm/°C max
Throughput PC dependent
Settling time (to .01% of 10V step) 4µs typ
Slew Rate 7V/µS
Current Drive ±5 mA min
Output short-circuit duration 25 mA indefinite
Output Coupling DC
Amp Output Impedance 0.1 Ohms max
Miscellaneous Power up and reset, all DAC's cleared to 0 volts, ±200mV
8.3 PARAELLEL DIGITAL INPUT/OUTPUT
Digital Type 82C55A
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 @ -2.5mA min
Output Low 0.4volts @ 2.5 mA max
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 INTA# - mapped to IRQn via PCI BIOS at boot-time
Interrupt enable Programmable
Interrupt sources Residual counter, End-of-channel-scan, AD-FIFO-not-empty,
AD-FIFO-half-full
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