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DDA-06 from $ 699
12 Bit 6 Channel Analog Output Interface
For IBM PC/XT/AT and Compatibles

The DDA-06 is an analog/digital I/O expansion board for the IBM personal computer that provides 6 channels of 12 bit analog output and 24 lines of digital I/O. The following functions are implemented on the DDA-06:

6 independent 12 bit D/A converters are provided. Each is individually switch and jumper selectable to any of the following ranges: 0 to10 V, 0 to 5 V, +2.5 V, +5 V, +10 V, 4 to 20 mA current loop. Each D/A has a double buffered input for single step update and occupies its own I/O location. By means of jumper blocks, it is possible to select any or all of the D/A's to update simultaneously. Since each D/A output uses one pin of the rear 37 pin D connector, D/A's may be operated in either voltage output mode or current output. 24 bits of digital I/O are provided on the rear connector consisting of 3 ports of 8 bits. Each port may be independently programmed as an input or output and is TTL/CMOS compatible.

 

PRICING

Model No.

Price

Description

DDA-06

$699

analog output interface board

STA-U

120

screw terminal board

SRA-01

115

solid state switch accessory board for digital I/O

ERB-24

425

relay output board

C-1800

30

18" 37-pin mating cable

 

 

 

Software
The following utility software is included with the DDA-06. Initial setup and installation aids, calibration program, programming examples and demonstration programs.
 

SPECIFICATIONS
POWER CONSUMPTION
+5 V supply: 450 mA typ, 550 mA max
+12 vsupply: 60 mA typ, 100 mA max
-12 v supply: 140 mA typ, 180 mA max
D/A CONVERTERS
Channels: 6
Resolution: 12 bits (1 part in 4095 decimal)
Output Ranges: 0 to 5 V, 0 to 10 V, +2.5 V, + 5V,
4 to 20 mA
VOLTAGE OUTPUT CHARACTERISTICS
Load Current: +5 mA max
Output resistance: < 0.1 ohm
4 to 20 Current Loop Characteristics Output
resistance: >100 M ohm
Minimum Loop Excitation Voltage: +6V
Maximum Loop Excitation Voltage: -6V
DIGITAL INPUTS/OUTPUTS
Number: 24 lines (3-8 bit ports)
TTL/DTL/CMOS COMPATIBLE INPUT
CHARACTERISTICS
Logic Low Level: -0.5 V mm. to +0.8V max
Logic High Level: +2.0 V min.to +5.0 V max
Input Current: + 10 m A
TTL/DTL/CMOS COMPATIBLE OUTPUT
CHARACTERISTICS
Output Low Sink Current: 1.7 mA at Vol =0.45V
Operating Temp: 0 to 500C