Microchip Technology MA160014 Datenbogen
PIC18(L)F2X/4XK22
DS41412F-page 464
2010-2012 Microchip Technology Inc.
FIGURE 27-23:
A/D CONVERSION TIMING
TABLE 27-22: A/D CONVERTER CHARACTERISTICS:PIC18(L)F2X/4XK22
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
A01
N
R
Resolution
—
—
10
bits
V
REF
3.0V
A03
E
IL
Integral Linearity Error
—
±0.5
±1
LSb
V
REF
= 3.0V
A04
E
DL
Differential Linearity Error
—
±0.5
±1
LSb
V
REF
3.0V
A06
E
OFF
Offset Error
—
±0.7
±2
LSb
V
REF
3.0V
A07
E
GN
Gain Error
—
±0.7
±2
LSb
V
REF
3.0V
A08
E
TOTL
Total Error
—
±0.8
±3
LSb
V
REF
3.0V
A20
V
REF
Reference Voltage Range
(V
(V
REFH
– V
REFL
)
2
—
V
DD
V
A21
V
REFH
Reference Voltage High
V
DD
/2
—
V
DD
+ 0.3
V
A22
V
REFL
Reference Voltage Low
V
SS
– 0.3V
—
V
DD
/2
V
A25
V
AIN
Analog Input Voltage
V
REFL
—
V
REFH
V
A30
Z
AIN
Recommended Impedance of
Analog Voltage Source
Analog Voltage Source
—
—
3
k
Note:
The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(Note 2)
9
8
7
2
1
0
Note 1:
If the A/D clock source is selected as RC, a time of T
CY
is added before the A/D clock starts.
This allows the SLEEP instruction to be executed.
2:
This is a minimal RC delay (typically 100 ns), which also disconnects the holding capacitor from the analog input.
.. .
. . .
T
CY