PIC16F1782_12 Datasheet, PDF (162/450 Pages) Microchip Technology – 28-Pin 8-Bit Advanced Analog Flash Microcontroller

PIC16(L)F1782/3
FIGURE 17-4:
ANALOG INPUT MODEL
Analog
Input
Rs ^pin
VDD
VT  0.6V
RIC  1k
Sampling
Switch
SS _Rss
VA
CPIN
5 pF
VT  0.6V
I LEAKAGE⁽¹⁾
CHOLD = 10 pF
VSS/VREF-
Legend: CHOLD
CPIN
= Sample/Hold Capacitance
= Input Capacitance
I LEAKAGE = Leakage current at the pin due to
various junctions
RIC
= Interconnect Resistance
RSS
= Resistance of Sampling Switch
SS
= Sampling Switch
VT
= Threshold Voltage
Note 1: Refer to Section 30.0 “Electrical Specifications”.
6V
5V
RSS
VDD 4V
3V
2V
5 6 7 8 9 10 11
Sampling Switch
(k)
FIGURE 17-5:
ADC TRANSFER FUNCTION
FFFh
FFEh
FFDh
FFCh
FFBh
Full-Scale Range
03h
02h
01h
00h
VREF-
0.5 LSB
Zero-Scale
Transition
Full-Scale
Transition
Analog Input Voltage (Positive input channel
relative to negative
1.5 LSB
input channel)
VREF+
DS41579D-page 162
Preliminary
 2011-2012 Microchip Technology Inc.