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| PIC18F1XK22 Datasheet, PDF (218/388 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology | |||
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PIC18F1XK22/LF1XK22
FIGURE 16-5:
ANALOG INPUT MODEL
Rs ANx
VDD
VT = 0.6V
RIC ï£ 1k
Sampling
Switch
SS Rss
VA
CPIN
5 pF
VT = 0.6V
I LEAKAGE(1)
Discharge
Switch
CHOLD = 13.5 pF
VSS/VREF-
Legend: CPIN
= Input Capacitance
VT
= Threshold Voltage
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 25.0 âElectrical Specificationsâ.
3.5V
3.0V
2.5V
2.0V
1.5V
.1
1 10 100
Rss (kï)
FIGURE 16-6:
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+
DS41365D-page 218
Preliminary
ï£ 2010 Microchip Technology Inc.
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