TMS320F28075PZPQ datasheet(95/182 Pages) TI1

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PWMSYNC1

VREFHI

VDDA

VSSA

RPD

VDAC

DACCTL[DACREFSEL]

DACCTL[LOADMODE]

SYSCLK

DACCTL[SYNCSEL]

PWMSYNC2

PWMSYNC3

PWMSYNCn

...

D Q

DACVALS

…

n-1

DACVALA

Buffer

12-bit

DAC

VSSA

TMS320F28075

www.ti.com

SPRS902B – OCTOBER 2014 – REVISED OCTOBER 2015

5.8.3

Buffered Digital-to-Analog Converter (DAC)

The buffered DAC module consists of an internal reference DAC and an analog output buffer that is

capable of driving an external load. An integrated pulldown resistor on the DAC output helps to provide a

known pin voltage when the output buffer is disabled. This pulldown resistor cannot be disabled and

remains as a passive component on the pin, even for other shared pin mux functions. Software writes to

the DAC value register can take effect immediately or can be synchronized with PWMSYNC events.

Each buffered DAC has the following features:

•

12-bit programmable internal DAC

•

Selectable reference voltage

•

Pulldown resistor on output

•

Ability to synchronize with PWMSYNC

The block diagram for the buffered DAC is shown in Figure 5-38.

Figure 5-38. DAC Module Block Diagram

Specifications

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