Measurement Computing CIO-DAC08/16 - Manual (Page 5)

1.0 INTRODUCTION
The CIO-DAC16/16 is a 16-channel analog output board. The CIO-DAC08/16 is an
8-channel analog output board. The analog outputs are from AD660BNs with each
output buffered by an OP-27.
The analog outputs are controlled by writing a digital control word as two bytes to the
DAC's control register. The control register is double buffered so the DAC's output is
not updated until the second byte (the high byte) has been written.
The analog outputs may also be set for simultaneous update by selecting XFER on
jumper J18. This jumper applies to all DACs.
When the DACs are set for simultaneous update, writing new digital values to a
DAC's control register does not cause an update of the DAC's voltage output. Update
of the output occurs only after a READ from the board's addresses (any address from
base + 0 through base + 31, or through base +15 for the DAC08).
2.0 SOFTWARE INSTALLATION
The CIO-DAC##/16 is supplied with InstaCal. InstaCal is an installation, calibration
and test package. Use it to guide the installation procedure. InstaCal also creates a
configuration file required for programmers who have purchased the Universal
Library programming libraries. Refer to the Software Installation Manual for
complete instructions. If you decide not to use InstaCal as a guide, the information
required for configuring the board is provided in the following section.
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