Datasheet
PWMSYNC1
VREFHI
VDDA
VSSA
RPD
VDAC
DACCTL[DACREFSEL]
DACCTL[LOADMODE]
SYSCLK
DACCTL[SYNCSEL]
PWMSYNC2
PWMSYNC3
PWMSYNCn
...
0
1
D Q
>
D Q
>
DACVALS
0
1
2
…
n-1
0
1
DACVALA Buffer
12-bit
DAC
VSSA
113
TMS320F28379S
,
TMS320F28377S
TMS320F28376S, TMS320F28375S, TMS320F28374S
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SPRS881C –AUGUST 2014–REVISED MAY 2016
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Product Folder Links: TMS320F28379S TMS320F28377S TMS320F28376S TMS320F28375S TMS320F28374S
SpecificationsCopyright © 2014–2016, Texas Instruments Incorporated
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 5-42.
Figure 5-42. DAC Module Block Diagram