PIC18F23K20_10 Datasheet, PDF (276/456 Pages) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC18F2XK20/4XK20
FIGURE 19-5:
ANALOG INPUT MODEL
VDD
Rs ^ANx
VA
CPIN
5 pF
RIC  1k
Sampling
Switch
SS _Rss
I LEAKAGE⁽¹⁾
CHOLD = 13.5 pF
Discharge
Switch
VSS/VREF-
Legend: CPIN
= Input Capacitance
I LEAKAGE = Leakage current at the pin due to
various junctions
RIC
= Interconnect Resistance
SS
= Sampling Switch
CHOLD = Sample/Hold Capacitance
Note 1: See Section 26.0 “Electrical Characteristics”.
3.5V
3.0V
2.5V
2.0V
1.5V
.1
1 10 100
Rss (k)
FIGURE 19-6:
ADC TRANSFER FUNCTION
Full-Scale Range
3FFh
3FEh
3FDh
3FCh
3FBh
004h
003h
002h
001h
000h
VSS/VREF-
1/2 LSB ideal
Zero-Scale
Transition
1/2 LSB ideal
Full-Scale
Transition
Analog Input Voltage
VDD/VREF+
DS41303G-page 276
 2010 Microchip Technology Inc.