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Features

•

unipolar & bi-polar output ranges

continuous output modes

& time event trigger sources

decimal data formats

waveform generation

outputs

mable 16-bit D/A converter. It can be

configured with either two or four output

channels, which are optically isolated from

each other and from IEEE 488 common

by up to 500 VDC. Each channel is inde-

pendently programmable for 1, 2, 5, or 10

VFS unipolar or bipolar output, specified

as either bits or volts in ASCII, integer,

hexadecimal, or binary format. Multiple

output modes, multiple clock and trigger

sources, and buffer management enable

the DAC488HR to function as a precision

voltage source, a function generator, or

an arbitrary waveform generator.

Waveforms captured by IOtech’s 16-bit,

100-kHz ADC488A series (see p. 243) digi-

tizers can be edited and transferred to the

series and DAC488HR in combination

form a powerful waveform I/O system.

Typical applications include transducer

simulation, disk drive testing, vibration

analysis, and materials testing.

DAC488HR

™

16-bit D/A Converter with Digital I/O & IEEE 488

Burst Mode. Functionally identical to step

mode, except that waveforms rather than

single values are output.

Waveform Mode. Based on recognition

of a trigger, the waveform buffer is output

for a specified number of cycles.

Continuous Mode. Data is continuously

input from the IEEE 488 bus and output to

an analog channel at rates up to 200 Kbytes/s

upon the detection of a specified trigger.

This mode is ideally suited for audio, speech,

and other applications that require long

duration waveforms.

Trigger Modes

The DAC488HR’s five trigger modes sup-

port a wide variety of applications.

Bus Control Mode. Each port is programmed

to output a specified value under direct

control from the IEEE 488 bus. This mode is

useful for maintaining an initial value until

a specified condition occurs.

Step Mode. When a specified trigger is

detected, a value is output from the

buffer, and the DAC488HR is automati-

cally re-armed until the specified buffer

count is reached. The last specified buffer

value is held as the output.

+ -

+ -

+ -

+ -

IEEE

Filter488

DAC488HR/2

SCSI488/S

DAC488HR

IEEE 488

controller

Up to 13 IEEE 488 devices

2- or 4-channel 16-bit,

isolated 100-kHz

analog outputs

8 digital

outputs

8 digital

inputs

DAC488HR

CH1 CH2 CH3 CH4

The versatile DAC488HR functions as a voltage source, function generator, and an arbitrary

waveform generator