PIPDA4-1

12-bit Analog Output PC/104 Module

Description

PIPDA4-1 (Ruby-MM) is a PC/104 module with 4 or 8 12-bit resolution analog outputs. These analog outputs feature multiple full-scale output voltage ranges, both unipolar and bipolar operation, and simultaneous update across all channels. The user can select from several fixed output ranges and one variable range or supply up to two external AC or DC references to customize the board's operation. On-board DC/DC converters provide analog power and isolate the analog circuitry from system noise.

Digital I/O Features

PIPDA4-1 includes 24 digital I/O lines with pull-up resistors, as well as an external trigger input. The trigger signal can be used to control D/A updates or to generate interrupts on the PC/104 bus. Free software is included to control these and all other board features.

Rugged Design for the Real World

As with all our analog I/O boards, PIPDA4-1 utilizes a 4-layer PCB with split analog and digital power and ground planes to keep the analog outputs quiet. All analog and digital lines reset to a known state on power up or system reset to guarantee predictable behavior. Factory calibration ensures the highest possible accuracy over the lifetime of the product. The board requires only +5V from the system power supply. And an extended temperature (40 to +85°C) version is available special order. These features make PIPDA4-1's quality and performance hard to beat.

Simultaneous Update

All analog outputs are updated simultaneously with a single read command. This feature minimizes time skew effects when multiple channels are being used to control a single device (for example, when two channels are controlling the X-Y position on a laser). When an update command occurs, only channels with new data written to them will change; the remaining channels will maintain their current output voltage level without interruptions or glitches.

Specifications

Analog Outputs
Number of outputs	4 or 8, voltage output
Resolution	12 bits (1 part in 4096)
Fixed output ranges	0-5V, 0-10V unipolar, ±5V, ±10V bipolar
Adjustable range	Preset to 2.5V for 0-2.5V, ±2.5V output ranges. Can be adjusted anywhere between 0V and 2.5V
External reference	0V min, 10V max
Setting time	6µs max to ±.01%
Accuracy	±1LSB
Integral nonlinearity	±1LSB max
Differential nonlinearity	-1LSB max, guaranteed monotonic
Output current	±5mA max per channel
Minimum load	2K
Update method	Simultaneous update
Reset	Voltage (0V for bipolar ranges, 1/2 full-scale for unipolar ranges)
Digital I/O
Number of lines	24, CMOS/TTL compatible (82C55)
Input voltage
Logic 0:	-0.5V min, 0.8V max
Logic 1:	2.0V min, 5.5V max
Output voltage
Logic 0:	0.0V min, 0.4V max
Logic 1:	3.0V min, Vcc - 0.4V max
Output current	±2.5mA max per line
Pull-up resistor	10KΩ on each I/O lines
External trigger	TTL/CMOS compatible, 10KΩ pull-up resistor, active high edge
Reset	All digital I/O lines are set to input and all data registers are set to 0
General
Power supply (Vcc)	+5VDC ±10%
Required current
RMM-4:	220mA typical, outputs open
RMM-8:	290mA typical, outputs open
Operating temperature	-40 to +85°C Extended
Size	3.55" x 3.775"
Data bus	8 bits
Weight	-4: 2.5 oz/71g -8: 2.7 oz/76g

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