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| PIC24FJ256GA110_10 Datasheet, PDF (233/330 Pages) Microchip Technology – 64/80/100-Pin, 16-Bit, General Purpose Flash Microcontrollers with Peripheral Pin Select | |||
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PIC24FJ256GA110 FAMILY
EQUATION 21-1: A/D CONVERSION CLOCK PERIOD(1)
TAD = TCY ⢠(ADCS + 1)
ADCS = TAD â 1
TCY
Note 1: Based on TCY = 2 * TOSC, Doze mode and PLL are disabled.
FIGURE 21-2:
10-BIT A/D CONVERTER ANALOG INPUT MODEL
Rs ANx
VA
CPIN
6-11 pF
(Typical)
VDD
VT = 0.6V
VT = 0.6V
RIC ï£ 250ï
ILEAKAGE
ï±500 nA
Sampling
Switch
RSS
RSS ï£ 5 kïï (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. The effect of CPIN is negligible if Rs ï£ 5 kï.
ï£ 2010 Microchip Technology Inc.
DS39905E-page 233
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