PIC16F1826-ESLASHML datasheet(139/406 Pages) MICROCHIP

139 / 406 page

 2010 Microchip Technology Inc.

Preliminary

DS41391C-page 139

PIC16F/LF1826/27

15.0 ANALOG-TO-DIGITAL

CONVERTER (ADC) MODULE

The

Analog-to-Digital

Converter

(ADC)

allows

conversion of an analog input signal to a 10-bit binary

representation of that signal. This device uses analog

inputs, which are multiplexed into a single sample and

hold circuit. The output of the sample and hold is

connected to the input of the converter. The converter

generates a 10-bit binary result via successive

approximation and stores the conversion result into the

ADC result registers (ADRESH:ADRESL register pair).

Figure 15-1 shows the block diagram of the ADC.

The ADC voltage reference is software selectable to be

either internally generated or externally supplied.

The ADC can generate an interrupt upon completion of

a conversion. This interrupt can be used to wake-up the

device from Sleep.

FIGURE 15-1:

ADC BLOCK DIAGRAM

DAC

VDD

VREF+

ADPREF = 10

ADPREF = 00

ADPREF = 11

FVR Buffer1

VSS

VREF-

ADNREF = 1

ADNREF = 0

Note:

When ADON = 0, all multiplexer inputs are disconnected.

ADON

GO/DONE

VSS

ADC

00000

00001

00010

00011

00100

00101

00111

00110

01000

01001

01010

01011

11110

CHS<4:0>

AN0

AN1

AN2

AN4

AN5

AN6

AN7

AN3

AN8

AN9

AN10

AN11

11111

ADRESH ADRESL

ADFM

0 = Left Justify

1 = Right Justify

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