The versatile DAC488HR functions as a voltage source, function generator, and an arbitrary
鈩?/div>
is an IEEE 488 program-
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鈥檚 16-bit,
100-kHz ADC488A series (see p. 243) digi-
tizers can be edited and transferred to the
DAC488HR for output. The ADC488A
鈩?/div>
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.
Filter488
DAC488HR
IEEE
IEEE 488
controller
+- +- +- +-
CH1 CH2 CH3 CH4
DAC488HR
2- or 4-channel 16-bit,
isolated 100-kHz
analog outputs
8 digital 8 digital
outputs inputs
Trigger Modes
The DAC488HR鈥檚 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.
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.
Q U I C K
tel: 440-439-4091
fax: 440-439-4093
F I N D
sales@iotech.com
www.iotech.com
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