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2-5
Notes:
All channels on a quad DAC have the same voltage output
range; you cannot select a voltage output range on a
channel-by-channel basis.
Make sure that you select a voltage output range that includes all the
output values required by the device connected to your board. In
addition, make sure that the range does not exceed the required values
excessively; this ensures the best possible resolution and prevents
potential damage to the device.
●
Current output
— For current output, the range is always 4 to 20
mA. For current output, you must set the output range type and the
output span switches on the board to current output. Refer to page
3-15 and page 3-17 for more information.
Each analog output channel has a resolution of 12 bits, which translates to
a raw count value between 0 and 4095. For bipolar voltage output ranges,
a value of 0 represents negative full scale and a value of 4095 represents
positive full scale. For unipolar voltage output ranges, a value of 0
represents 0V and a value of 4095 represents positive full scale. For
current output ranges, a value of 0 represents 4mA and a value of 4095
represents 20mA.
Note:
To ensure that the analog output channels power-up to a known
state, the output value from all channels configured for voltage output is
nominally 0V at power-up and the output value from all channels
configured for current output is nominally 0mA at power-up.
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