Measurement Computing CIO-DAC04/12 - Manual (Page 8)

3.2 ANALOG OUTPUTS
Analog outputs are voltage outputs which can be connected to any device which will record, display or be controlled by a voltage. The
CIO-DAC04/12-HS analog outputs are produced with four quadrant-multiplying DACs. They accept an input voltage reference and
provide an output voltage which is inverse to the reference voltage and proportional to the digital value in the output register.
For example, in unipolar mode, the supplied reference of
−
5V provides a +5V output when the value in the output register is 4095 (full
scale at 12-bits of resolution). It provides a value of 2.5V when the value in the output register is 2048.
Figure 3-2 is a simplified block diagram of the CIO-DAC04/12-HS.
Figure 3-2. D/A Output Configuration
-4-
Gain Select
DAC
Upper
Byte
Control
DAC
Lower
Byte
Control
FIFO
Lower
Byte
FIFO
Upper
Byte
DAC Control
DIO Control
Decoder Logic
DAC0 OUT
DAC1 OUT
DAC2 OUT
DAC3 OUT
PAL
DAC3
DAC0