PIC16F1847 datasheet(155/408 Pages) MICROCHIP

Part #	PIC16F1847

Description	18/20/28-Pin Flash Microcontrollers with nanoWatt XLP Technology

PDF	408 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2011 Microchip Technology Inc.

Preliminary

DS41453B-page 155

PIC16(L)F1847

17.4

DAC Voltage Reference Output

The DAC can be output to the DACOUT pin by setting

the DACOE bit of the DACCON0 register to ‘1’. Selecting

the DAC reference voltage for output on the DACOUT

pin automatically overrides the digital output buffer and

digital input threshold detector functions of that pin.

Reading the DACOUT pin when it has been configured

for DAC reference voltage output will always return a ‘0’.

Due to the limited current drive capability, a buffer must

be used on the DAC voltage reference output for

external connections to DACOUT. Figure 17-3 shows

an example buffering technique.

FIGURE 17-2:

DIGITAL-TO-ANALOG CONVERTER BLOCK DIAGRAM

DACR<4:0>

VREF-

DACNSS

DAC

DACOUT

(To Comparator and

ADC Modules)

DACOE

VDD

VREF+

DACPSS<1:0>

DACEN

Steps

Digital-to-Analog Converter (DAC)

FVR BUFFER2

VSRC-

VSRC+

VSS

DACLPS

PIC16F1847 Datasheet(PDF) 155 Page - Microchip Technology