PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 287

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 22-13:
TABLE 22-15: A/D CONVERSION REQUIREMENTS
© 2006 Microchip Technology Inc.
130
131
132
135
TBD
Legend: TBD = To Be Determined
Note 1:
Param
No.
Note 1:
A/D CLK
A/D DATA
SAMPLE
2:
3:
4:
ADRES
BSF ADCON0, GO
T
T
T
T
T
Symbol
ADIF
AD
CNV
ACQ
SWC
DIS
2:
GO
The time of the A/D clock period is dependent on the device frequency and the T
ADRES register 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.
Q4
(1)
If the A/D clock source is selected as RC, a time of T
to be executed.
This is a minimal RC delay (typically 100 ns), which also disconnects the holding capacitor from the analog input.
132
A/D Clock Period
Conversion Time
(not including acquisition time)
Acquisition Time
Switching Time from Convert
Discharge Time
A/D CONVERSION TIMING
(Note 2)
Characteristic
DD
(3)
9
to V
SS
8
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
Advance Information
or V
OLD_DATA
SS
7
(2)
Sample
SAMPLING STOPPED
to V
. . .
CY
DD
is added before the A/D clock starts. This allows the SLEEP instruction
). The source impedance (R
CY
. . .
130
cycle.
131
TBD
TBD
TBD
Min
0.7
1.4
1.4
0.2
11
—
2
(Note 4)
25.0
25.0
PIC18F1230/1330
Max
12
—
—
—
1
3
1
(1)
(1)
Units
T
AD
s
s
s
s
s
s
s
S
0
) on the input channels is 50 .
T
V
T
A/D RC mode
V
-40 C to +85 C
0 C
OSC
OSC
DD
DD
AD
= 2.0V,
= 2.0V, A/D RC mode
based, V
based, V
clock divider.
DONE
to
NEW_DATA
Conditions
DS39758B-page 285
T
+85 C
CY
REF
REF
full range
3.0V