ADDRESSING & INTERRUPTS

Jumper–selectable base addresses of 100h, 140h, 180h, 200h, 280h, 300h, 340h, or 380h. Interrupts selected via jumpers to indicate end of analog conversion. The board can also generate interrupts to transfer digital data into or out of the board, as well as at regular intervals according to a programmable timer on the board. Individual control bits are used to enable each type of interrupt.

ANALOG INPUTS

32 input channels, may be configured as 32 single–ended, 16 differential, or 16 SE + 8 DI, 16–bit resolution, Programmable gain, range, and polarity on inputs, Input ranges:Bipolar: ±10V, ±5V, ±2.5V, ±1.25V, ±0.625V Unipolar: 0–10V, 0–5V, 0–2.5V, 0–1.25V, 1024–sample FIFO for reduced interrupt overhead, Autocalibration of all input ranges under software control, Input bias current 100 pA max, Maximum input voltage ±10V for linear operation, Overvoltage protection ±35V on any analog input without damage, Nonlinearity ±3 LSB, no missing codes, Conversion rate 250,000 samples per second max. (with DMA), single channel, Conversion trigger software command, internal pacer clock, or external TTL signal

ANALOG OUTPUTS

4 analog output channels with 12–bit resolution, 5 mA max output current, D/A resolution 12 bits (1/4096 of full scale), Multiple fixed full–scale output ranges, including unipolar and bipolar ranges: Fixed unipolar: 0–5V or 0–10V Fixed bipolar: ±5V or ±10V Programmable: 0–10V or ±10V in .01V steps, Autocalibration under software control, Output current ±5 mA max per channel, Settling time 6 µS max. to ±1/2 LSB, Relative accuracy ±1 LSB, Nonlinearity ±1 LSB, monotonic, Output reference +5V ±.005V

AUTOCALIBRATION

Three circuits calibrated: A/D (all nine input ranges)& D/A, A/D error after calibration ±2 LSB, D/A error after calibration ±1 LSB

CONNECTORS

50–pin connector for all analog I/O; connects to C–50–18 cable, 34–pin connector for all digital I/O; connects to C–34–18 cable

COUNTER/TIMERS & A/D TRIGGERING

1 32–bit counter/timer for A/D pacer clock and interrupt operation timing, 1 16–bit general purpose counter/timer, Programmable input sources for each counter/timer, External A/D triggering and gating inputs, Multiple–board synchronization capability using, A/D convert pulse out and external trigger in, Interrupts may be generated by counter/timer, A/D pacer clock 32–bit down counter (2 82C54 counters cascaded), Clock sources 10 MHz on–board clock oscillator, 100 KHz derived frequency, General purpose 16–bit down counter (1 82C54 counter), Interrupt triggers: End of A/D conversion, latch input on digital I/O header, timer 0 output

DIGITAL I/O

31 total lines: 24 bidirectional lines using integrated 8255–type circuit; seven (7) auxiliary I/O lines are fixed direction with programmable functions, Buffered I/O for enhanced current drive, Handshaking controls enable latch input, acknowledge output available in 8255 mode as well as interrupt operation, User–configurable pull–up/pull–down resistors, 4.7K pull up/pull down resistors, Input current ±1 mA max, Output current +15/–64 mA max. per line, Auxiliary DIO 4 inputs, 3 outputs, TTL compatible

ENVIRONMENTAL

–40° to 85° C operating, 5% to 95%, RH, noncondensing

SIZE & POWER

3.550 in. x 3.775 in., PC/104 form factor; compatible with 8–bit bus systems, +5VDC ±10%, 410 mA typical, I/O header ±15V, current ±10 mA max

SOFTWARE DRIVERS

DOS, Linux 2.4, QNX, & Windows XP, NT, 98