Microchip Technology DM164134 Data Sheet
PIC18FXX8
DS41159E-page 358
© 2006 Microchip Technology Inc.
TABLE 27-23: A/D CONVERTER CHARACTERISTICS: PIC18FXX8 (INDUSTRIAL, EXTENDED)
PIC18LFXX8 (INDUSTRIAL)
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
Conditions
A01
N
R
Resolution
—
—
10
bit
V
REF
= V
DD
≥ 3.0V
A03
E
IL
Integral Linearity Error
—
—
<±1
LSb V
REF
= V
DD
≥ 3.0V
A04
E
DL
Differential Linearity Error
—
—
<±1
LSb V
REF
= V
DD
≥ 3.0V
A05
E
FS
Full Scale Error
—
—
<±1
LSb V
REF
= V
DD
≥ 3.0V
A06
E
OFF
Offset Error
—
—
<±1.5
LSb V
REF
= V
DD
≥ 3.0V
A10
—
Monotonicity
(3)
guaranteed
—
V
SS
≤ V
AIN
≤ V
REF
A20
V
REF
Reference Voltage
(V
(V
REFH
– V
REFL
)
0V
—
—
V
A20A
3V
—
—
V
For 10-bit resolution
A21
V
REFH
Reference Voltage High
V
SS
—
V
DD
+ 0.3V
V
A22
V
REFL
Reference Voltage Low
V
SS
– 0.3V
—
V
DD
V
A25
V
AIN
Analog Input Voltage
V
SS
– 0.3V
—
V
REF
+ 0.3V
V
A30
Z
AIN
Recommended Impedance of
Analog Voltage Source
Analog Voltage Source
—
—
10.0
k
Ω
A40
I
AD
A/D Conversion
Current (V
Current (V
DD
)
PIC18FXX8
—
180
—
μA Average current
consumption when
A/D is on (Note 1)
A/D is on (Note 1)
PIC18LFXX8
—
90
—
μA
A50
I
REF
V
REF
Input Current (Note 2)
0
—
—
—
5
150
μA
μA
During V
AIN
acquisition.
Based on differential of
V
V
HOLD
to V
AIN
. To
charge C
HOLD
.
During A/D conversion
cycle.
cycle.
Note 1:
When A/D is off, it will not consume any current other than minor leakage current. The power-down current
specification includes any such leakage from the A/D module.
V
specification includes any such leakage from the A/D module.
V
REF
current is from RA2/AN2/V
REF
- and RA3/AN3/V
REF
+ pins or V
DD
and V
SS
pins, whichever is selected
as reference input.
2:
V
SS
≤ V
AIN
≤ V
REF
3:
The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
codes.