User`s guide

319
Chapter 7 Tutorial
Multifunction Module
4
7
Voltage (DAC) Output
The 34907A module has two analog outputs capable of outputting
calibrated voltages between ±12 volts with 16 bits of resolution. Each
DAC (Digital-to-Analog Converter) channel can be used as a
programmable voltage source for analog input to other devices.
• You can set the output voltage to any value between +12 VDC and -12
VDC, in 1 mV steps. Each DAC is earth referenced; it cannot float.
• Each DAC channel is capable of supplying 10 mA maximum current.
Note: You must limit the output current to 40 mA total for all three
slots (six DAC channels).
• To maintain the rated output accuracy, the load (R
L
in the diagram
shown above) must be greater than 1 k.
16-Bit
Digital Data
DAC
Output Voltage
R
L
34970A Refresh UG.book Page 319 Wednesday, February 17, 2010 12:34 PM