Datasheet

 2012-2013 Microchip Technology Inc. DS30009312B-page 367
PIC24FJ128GC010 FAMILY
FIGURE 26-2: 12-BIT A/D CONVERTER SINGLE-ENDED ANALOG INPUT MODEL
CPIN
VA
Rs
ANx
I
LEAKAGE
RIC  250
Sampling
Switch
R
SS
CHOLD
VSS
= 2 pF
50 nA typ.
Legend: CIN
VT
ILEAKAGE
RIC
RSS
CHOLD
= Pin Capacitance + Channel MUX Capacitance
(2)
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch Resistance
= Sample/Hold Capacitance (from DAC)
various junctions
Note 1: The CIN value depends on the device package and is not tested. The effect of CPIN is negligible if Rs  1.5 k.
2: The input channel multiplexer will add capacitance based on the input channel selected. Selecting
Channels AN0-AN14 will add <5 pF and selecting Channels AN15 and above will add ~16 pF.