Measurement-computing CIO-DAC04/12 Manual de usuario descargar pdf (Pagina 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

DAC1 OUT

DAC3 OUT

PAL

DAC3

DAC0

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 17 18

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Measurement-computing CIO-DAC04/12 Manual de usuario Pagina 8