PIC24FV16KM204 Datasheet, PDF (229/336 Pages) Microchip Technology – General Purpose, 16-Bit Flash Microcontroller with XLP Technology Data Sheet

PIC24FV16KM204 FAMILY
20.0 8-BIT DIGITAL-TO-ANALOG
CONVERTER (DAC)
Note:
This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”.
Device-specific information in this data
sheet supersedes the information in the
“PIC24F Family Reference Manual”.
PIC24FV16KM204 family devices include two 8-bit
Digital-to-Analog Converters (DACs) for generating
analog outputs from digital data. A simplified block
diagram for a single DAC is shown in Figure 20-1. Both
of the DACs are identical.
The DAC generates an analog output voltage based on
the digital input code, according to the formula:
VDACREF  DACxDAT
VDAC =
256
where VDAC is the analog output voltage and VDACREF
is the reference voltage selected by DACREF<1:0>.
Each DAC includes these features:
• Precision 8-bit resistor ladder for high accuracy
• Fast settling time, supporting 1 Msps effective
sampling rates
• Buffered output voltage
• Three user-selectable voltage reference options
• Multiple conversion Trigger options, plus a
manual convert-on-write option
• Left and right-justified input data options
• User-selectable Sleep and Idle mode operation
When using the DAC, it is recommended to set the ANSx
and TRISx bits for the DACx output pin to configure it as
an analog output. See Section 11.2 “Configuring
Analog Port Pins” for more information.
FIGURE 20-1:
SINGLE DACx SIMPLIFIED BLOCK DIAGRAM
DACxREF
AVDD
BGBUF0
2x Gain Buffer
DACSIDL
Idle Mode
DACSLP
Sleep Mode
DACREF<1:0>
DACEN
DACOE
DACxCON
DACxDAT
32
DACx Trigger
Sources
8
Trigger and
Interrupt Logic
8-Bit
Resistor
Ladder
DACxOUT
Pin
DACTRIG
DACTSEL<4:0>
DACxIF
AVss
 2013 Microchip Technology Inc.
Advance Information
DS33030A-page 229