12

AVR32768

32157A-AVR-12/10

8 Digital-to-analog converter

The digital-to-analog converter (DAC) can use either an internal or external voltage

reference. When using an internal voltage reference, DACREF can be GPIO

multiplexed to another function or connected to an internal pull-up.

8.1 DAC connection

Figure 8-1.

DAC connection considerations.

DACREF

DAC0B

DAC0A

1 kΩ

1 kΩ

DC/DC

converter

1.1 to VDDANA-0.3 V

Table 8-1.

Digital-to-analog converter checklist.

Signal name

Recommended pin connection

Description

DACREF

Reference voltage range:

1.1V – (VDDANA-0.3V)

External voltage reference

DAC0A

Minimum load impedance: 1kΩ

Maximum load capacitance: 100pF

Channel A analog output

DAC0B

Minimum load impedance: 1kΩ

Maximum load capacitance: 100pF

Channel B analog output

1.1V to VDDANA-0.3V

Power Source