PIC16F753 Datasheet, PDF (113/238 Pages) Microchip Technology – 14/16-Pin, Flash-Based 8-Bit CMOS Microcontrollers

PIC16F753/HV753
12.0 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 (ADRESL and ADRESH).
The ADC voltage reference is software selectable to
either VDD or a voltage applied to the external reference
pins.
The ADC can generate an interrupt upon completion of
a conversion. This interrupt can be used to wake-up the
device from Sleep.
Figure 12-1 shows the block diagram of the ADC.
Note: The ADRESL and ADRESH registers are
read-only.
FIGURE 12-1:
ADC BLOCK DIAGRAM
VREF+
VDD
ADPREF = 0
ADPREF = 1
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Dac output
Fixed Voltage Reference
0000
0001
0010
0011
0100
0101
0110
0111
1110
1111
A/D
GO/DONE
ADON
Vss
10
ADFM
0 = Left Justify
1 = Right Justify
10
ADRESH ADRESL
CHS<3:0>
 2013 Microchip Technology Inc.
Preliminary
DS40001709A-page 113