PIC16LF720_11 Datasheet, PDF (77/244 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC16(L)F720/721
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 a 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, FVREF, is an internally
generated supply only.
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
AVDD
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
AN10
AN11
Temperature Indicator
FVREF
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001 ^GO/DONE
ADC
1010
1011
1110
ADON
1111
VSS
CHS<3:0>
8
ADRES
 2011 Microchip Technology Inc.
Preliminary
DS41430B-page 77