PIC16F720-ESLASHML datasheet(77/244 Pages) MICROCHIP

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DS41430A-page 77

PIC16F/LF720/721

9.0

ANALOG-TO-DIGITAL

CONVERTER (ADC) MODULE

The

Analog-to-Digital

Converter

(ADC)

allows

conversion of an analog input signal to a 8-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

8-bit

binary

result

via

successive

approximation and stores the conversion result into the

ADC result register (ADRES). Figure 9-1 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 9-1:

ADC BLOCK DIAGRAM

AN0

AN1

AN2

AN4

ADON

GO/DONE

CHS<3:0>

VSS

AN5

AN6

AN7

AN3

AN8

AN9

AN10

AN11

Temperature Indicator

FVREF

0000

0001

0010

0011

0100

0101

0111

0110

1000

1001

1010

1011

1110

1111

ADC

ADRES

AVDD

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