Microchip Technology MA240017 Data Sheet
2008-2011 Microchip Technology Inc.
DS39927C-page 181
PIC24F16KA102 FAMILY
EQUATION 22-1:
A/D CONVERSION CLOCK PERIOD
(1)
FIGURE 22-2:
10-BIT A/D CONVERTER ANALOG INPUT MODEL
Note 1:
Based on T
CY
= 2 * T
OSC
; Doze mode and PLL are disabled.
T
AD
= T
CY
• (ADCS + 1)
T
AD
T
CY
ADCS =
– 1
C
PIN
VA
Rs
ANx
V
T
= 0.6V
V
T
= 0.6V
I
LEAKAGE
R
IC
250
Sampling
Switch
R
SS
C
HOLD
= A/D capacitance
V
SS
V
DD
= 4.4 pF (Typical)
±500 nA
Legend:
C
PIN
V
T
I
LEAKAGE
R
IC
R
SS
C
HOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch Resistance
= Sample/Hold Capacitance (from A/D)
= Sampling Switch Resistance
= Sample/Hold Capacitance (from A/D)
various junctions
Note:
C
PIN
value depends on device package and is not tested. Effect of C
PIN
negligible if Rs
5 k.
R
SS
5 k (Typical)
6-11 pF
(Typical)
(Typical)