Microchip Technology DM164134 Data Sheet

Page of 402
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
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
10.0
k
Ω
A40
I
AD
A/D Conversion
Current (V
DD
)
PIC18FXX8
180
μA Average current 
consumption when 
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
HOLD
 to V
AIN
. To 
charge C
HOLD
During A/D conversion 
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
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.