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PIC16F685-E/ML Datasheet(PDF) 119 Page - Microchip Technology

Part # PIC16F685-E/ML
Description  20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
PDF  306 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F685-E/ML Datasheet(HTML) 119 Page - Microchip Technology

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© 2008 Microchip Technology Inc.
DS41262E-page 117
PIC16F631/677/685/687/689/690
FIGURE 9-4:
ANALOG INPUT MODEL
FIGURE 9-5:
ADC TRANSFER FUNCTION
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself out.
2: The charge holding capacitor (CHOLD) is not discharged after each conversion.
3: The maximum recommended impedance for analog sources is 10 k
Ω. This is required to meet the pin
leakage specification.
CPIN
VA
Rs
ANx
5 pF
VDD
VT = 0.6V
VT = 0.6V
I LEAKAGE(1)
RIC
≤ 1k
Sampling
Switch
SS Rss
CHOLD = 10 pF
VSS/VREF-
6V
Sampling Switch
5V
4V
3V
2V
567 8 9 10 11
(k
Ω)
VDD
Legend: CPIN
VT
I LEAKAGE
RIC
SS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance
various junctions
RSS
Note 1: See Section 17.0 “Electrical Specifications”.
3FFh
3FEh
3FDh
3FCh
004h
003h
002h
001h
000h
Full-Scale
3FBh
1 LSB ideal
VSS/VREF-
Zero-Scale
Transition
VDD/VREF+
Transition
1 LSB ideal
Full-Scale Range
Analog Input Voltage



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