PIC24F16KA102_11 Datasheet, PDF (181/278 Pages) Microchip Technology – 20/28-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KA102 FAMILY
EQUATION 22-1: A/D CONVERSION CLOCK PERIOD⁽¹⁾
TAD
ADCS = _TCY – 1
TAD = TCY • (ADCS + 1)
Note 1: Based on TCY = 2 * TOSC; Doze mode and PLL are disabled.
FIGURE 22-2:
10-BIT A/D CONVERTER ANALOG INPUT MODEL
Rs ^ANx
VA
CPIN
6-11 pF
(Typical)
VDD
VT = 0.6V
VT = 0.6V
RIC  250
ILEAKAGE
±500 nA
Sampling
Switch
RSS
RSS  5 k (Typical)
CHOLD
= A/D capacitance
= 4.4 pF (Typical)
VSS
Legend:
CPIN
VT
ILEAKAGE
RIC
RSS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
various junctions
= Interconnect Resistance
= Sampling Switch Resistance
= Sample/Hold Capacitance (from A/D)
Note: CPIN value depends on device package and is not tested. Effect of CPIN negligible if Rs  5 k.
 2008-2011 Microchip Technology Inc.
DS39927C-page 181