Datasheet
PIC16(L)F1938/9
DS40001574C-page 160 2011-2013 Microchip Technology Inc.
FIGURE 15-4: ANALOG INPUT MODEL
FIGURE 15-5: ADC TRANSFER FUNCTION
CPIN
VA
Rs
Analog
5 pF
V
DD
VT 0.6V
V
T 0.6V
I
LEAKAGE
(1)
RIC 1k
Sampling
Switch
SS
Rss
C
HOLD = 10 pF
V
SS/VREF-
6V
Sampling Switch
5V
4V
3V
2V
567891011
(k
)
V
DD
Legend:
CPIN
VT
I LEAKAGE
RIC
SS
C
HOLD
= Input Capacitance
= Threshold Voltage
= Leakage current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance
various junctions
RSS
Note 1: Refer to in the applicable Electrical Specifications Chapter.
R
SS = Resistance of Sampling Switch
Input
pin
3FFh
3FEh
ADC Output Code
3FDh
3FCh
03h
02h
01h
00h
Full-Scale
3FBh
0.5 LSB
V
REF-
Zero-Scale
Transition
V
REF+
Transition
1.5 LSB
Full-Scale Range
Analog Input Voltage