PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 294

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2450/4450
TABLE 21-18: A/D CONVERSION REQUIREMENTS
DS39760A-page 292
130
131
132
135
137
Legend: TBD = To Be Determined
Note 1:
Param
No.
2:
3:
4:
T
T
T
T
T
Symbol
AD
CNV
ACQ
SWC
DIS
The time of the A/D clock period is dependent on the device frequency and the T
ADRES registers may be read on the following T
The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (V
On the following cycle of the device clock.
A/D Clock Period
Conversion Time
(not including acquisition time)
Acquisition Time
Switching Time from Convert
Discharge Time
Characteristic
DD
(3)
to V
SS
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
Advance Information
or V
SS
(2)
Sample
to V
DD
). The source impedance ( R
CY
cycle.
TBD
TBD
TBD
Min
0.7
1.4
1.4
0.2
11
—
(Note 4)
25.0
25.0
Max
12
—
—
—
1
3
(1)
(1)
Units
T
AD
s
s
s
s
s
s
s
S
© 2006 Microchip Technology Inc.
) on the input channels is 50 .
T
V
T
A/D RC mode
V
A/D RC mode
-40 C to +85 C
0 C
OSC
OSC
DD
DD
AD
= 2.0V,
= 2.0V,
based, V
based, V
clock divider.
to
Conditions
+85 C
REF
REF
full range
3.0V