Microchip Technology MA160014 数据表
2010-2012 Microchip Technology Inc.
DS41412F-page 465
PIC18(L)F2X/4XK22
TABLE 27-23: A/D CONVERSION REQUIREMENTS PIC18(L)F2X/4XK22
Standard Operating Conditions (unless otherwise stated)
Operating temperature
Operating temperature
Tested at +25°C
Param.
No.
Symbol
Characteristic
Min
Typ
Max
Units
Conditions
130
T
AD
A/D Clock Period
1
—
25
s
-40
C to +85C
1
—
4
s
+85
C to +125C
131
T
CNV
Conversion Time
(not including acquisition time) (Note 1)
(not including acquisition time) (Note 1)
12
—
12
T
AD
132
T
ACQ
Acquisition Time (Note 2)
1.4
—
—
s
V
DD
= 3V, Rs = 50
135
T
SWC
Switching Time from Convert
Sample
—
—
(Note 3)
136
T
DIS
Discharge Time
2
—
2
T
AD
Note 1:
ADRES register may be read on the following T
CY
cycle.
2:
The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale after the con-
version (V
version (V
DD
to V
SS
or V
SS
to V
DD
). The source impedance (R
S
) on the input channels is 50
.
3:
On the following cycle of the device clock.