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| PIC18F23K22 Datasheet, PDF (303/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology | |||
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PIC18(L)F2X/4XK22
FIGURE 17-5:
ANALOG INPUT MODEL
VDD
Rs ANx
VA
CPIN
5 pF
RIC ï£ 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 27.0 âElectrical Characteristicsâ.
3.5V
3.0V
2.5V
2.0V
1.5V
.1
1 10 100
Rss (kï)
FIGURE 17-6:
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+
ï£ 2010 Microchip Technology Inc.
Preliminary
DS41412B-page 303
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