PIC24FJ128GA010_09 Datasheet, PDF (180/240 Pages) Microchip Technology – 64/80/100-Pin General Purpose, 16-Bit Flash Microcontrollers

PIC24FJ128GA010 FAMILY
EQUATION 20-1: A/D CONVERSION CLOCK PERIOD⁽¹⁾
TAD = TCY(ADCS + 1)
TAD
ADCS =
–1
TCY
Note 1: Based on TCY = TOSC * 2; Doze mode and PLL are disabled.
FIGURE 20-2:
10-BIT A/D CONVERTER ANALOG INPUT MODEL
Rs ^ANx
VA
CPIN
6-11 pF
(Typical)
VDD
VT = 0.6V
VT = 0.6V
RIC ≤ 250Ω
ILEAKAGE
±500 nA
Sampling
Switch
RSS
RSS ≤ 5 kΩ (Typical)
CHOLD
= DAC 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 DAC)
Note: CPIN value depends on device package and is not tested. Effect of CPIN negligible if Rs ≤ 5 kΩ.
DS39747E-page 180
© 2009 Microchip Technology Inc.