PIC18FXX20
TABLE 26-25: A/D CONVERTER CHARACTERISTICS: PIC18FXX20 (INDUSTRIAL, EXTENDED)
PIC18LFXX20 (INDUSTRIAL)
Param
Symbol
Characteristic
Resolution
Min
Typ
Max
Units
Conditions
No.
A01
NR
—
—
—
—
10
TBD
bit VREF = VDD ≥ 3.0V
bit VREF = VDD < 3.0V
A03
A04
A05
A06
EIL
Integral linearity error
Differential linearity error
Full scale error
—
—
<±1
LSb VREF = VDD ≥ 3.0V
—
—
TBD
LSb VREF = VDD < 3.0V
EDL
EFS
EOFF
—
—
—
—
—
—
—
—
—
—
—
—
<±1
TBD
<±1
TBD
<±1
TBD
LSb VREF = VDD ≥ 3.0V
LSb VREF = VDD < 3.0V
LSb VREF = VDD ≥ 3.0V
LSb VREF = VDD < 3.0V
LSb VREF = VDD ≥ 3.0V
LSb VREF = VDD < 3.0V
Offset error
A10
A20
A20A
A21
A22
A25
A30
—
VREF
Monotonicity
Reference voltage
(VREFH - VREFL)
guaranteed(3)
—
V
V
V
V
VSS ≤ VAIN ≤ VREF
0V
3V
AVss
—
—
—
—
For 10-bit resolution
VREFH
VREFL
VAIN
Reference voltage High
Reference voltage Low
Analog input voltage
Recommended impedance of
analog voltage source
—
—
—
—
AVDD + 0.3V
AVDD
VREF + 0.3V
10.0
AVss – 0.3V
AVSS – 0.3V
—
V
kΩ
ZAIN
A40
A50
IAD
A/D conversion PIC18FXX20
—
—
180
90
—
—
µA Average current
current (VDD)
consumption when
PIC18LFXX20
µA
A/D is on (Note 1)
IREF
VREF input current (Note 2)
10
—
1000
µA During VAIN acquisition.
Based on differential of
VHOLD to VAIN. To charge
CHOLD see Section 19.0.
µA During A/D conversion
cycle.
—
—
10
Note 1: When A/D is off, it will not consume any current other than minor leakage current. The power-down current
spec includes any such leakage from the A/D module.
VREF current is from RA2/AN2/VREF- and RA3/AN3/VREF+ pins or AVDD and AVSS pins, whichever is selected
as reference input.
2: Vss ≤ VAIN ≤ VREF
3: The A/D conversion result never decreases with an increase in the input voltage, and has no missing codes.
2003 Microchip Technology Inc.
Advance Information
DS39609A-page 339
MICROCHIP [ MICROCHIP ]
