Microchip Technology DM183037 Data Sheet

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PIC18F97J94 FAMILY
DS30575A-page 436
 2012 Microchip Technology Inc.
FIGURE 22-1:
12-BIT A/D CONVERTER BLOCK DIAGRAM (PIC18F97J94 FAMILY)
Note 1: AN16 through AN23 are implemented on 80-pin and 100-pin devices only.
Comparator
12-Bit SAR
Conversion Logic
V
REF
+
DAC
AN(n-1)
ANn
(1)
AN8
AN9
AN4
AN5
AN6
AN7
AN0
AN1
AN2
AN3
V
REF
-
Sample Control
S/H
AV
SS
AV
DD
ADC1BUF0:
ADC1BUFn
(3)
AD1CON1
AD1CON2
AD1CON3
AD1CHS
AD1CHITL
AD1CHITH
Control Logic
Data Formatting
Input MUX Control
Conversion Control
Pin Config. Control
Internal Data Bus
16
V
R
+
V
R
-
MUX
 A
MUX
 B
V
INH
V
INL
V
INH
V
INH
V
INL
V
INL
V
R
+
V
R
-
V
R
 Sel
e
ct
V
BG(2)
V
BG
/6
(2)
AD1CSSL
CTMU
(2)
V
DDCORE(2)
AV
SS(2)
AV
DD(2)
AD1CON5
V
BG
/2
(2)
V
BG
AD1CSSH
AD1CTMENL
AD1CTMENH
AD1DMBUF
AD1CON4