PIC16C782 Microchip Technology Inc., PIC16C782 Datasheet - Page 71
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PIC16C782
Manufacturer Part Number
PIC16C782
Description
8-bit Cmos Microcontrollers With A/d, D/a, Opamp, Comparators And Psmc
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C782.pdf
(186 pages)
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9.0
The 8-bit ADC module, shown in Figure 9-1, has 10
inputs in the PIC16C781/782:
• 8 external channels, AN<7:0> (RA<3:0> and
• 2 internal channels, V
The ADC allows conversion of an analog input signal to
a corresponding 8-bit digital value. The desired chan-
nel is connected to a Sample-and-Hold by the input
multiplexers. The output of the Sample-and-Hold cap-
FIGURE 9-1:
RB<3:0>)
2001 Microchip Technology Inc.
RB0/INT/AN4/V
RA2/AN2/V
RA3/AN3/V
RA0/AN0/OPA+
RA1/AN1/OPA-
RB1/AN5/V
RB3/AN7/OPA
ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
RB2/AN6
REF
REF
DAC
2
1
R
ADC MODULE BLOCK DIAGRAM
R
and V
DAC
0
1
2
3
4
5
6
7
8
9
Preliminary
VOLTAGE COMPARATOR MODULE
OPA MODULE
4
DAC MODULE
AV
V
V
V
V
REF
R
DAC
R
tures a snapshot of the voltage and holds it for the
ADC. The ADC then generates the 8-bit result via suc-
cessive approximation.
The analog reference voltage (ADC
selectable from the following options:
• The analog positive supply: AV
• The reference input for Comparator C1: V
• The Voltage Reference module output: V
• The DAC Converter module output: V
The ADC has the unique feature of being able to oper-
ate while the device is in SLEEP mode. To operate in
SLEEP, the ADC conversion clock must be derived
from the ADC’s dedicated internal RC oscillator.
DD
MODULE
CHS<3:0>
1
0
1
2
3
PIC16C781/782
VCFG<1:0>
GO/DONE
ADON
Sample
Hold
and
ADC
DD
ADC
REF
DS41171A-page 69
REF
DAC
) is software
R
REF
8
1
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