PIC18FXX8 Datasheet, PDF (360/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
TABLE 27-23: A/D CONVERTER CHARACTERISTICS: PIC18FXX8 (INDUSTRIAL, EXTENDED)
PIC18LFXX8 (INDUSTRIAL)
Param
No.
Symbol
Characteristic
Min
Typ
Max Units
Conditions
A01 NR
Resolution
—
—
10
bit VREF = VDD ≥ 3.0V
A03 EIL
Integral Linearity Error
—
—
<±1
LSb VREF = VDD ≥ 3.0V
A04 EDL Differential Linearity Error
—
—
<±1
LSb VREF = VDD ≥ 3.0V
A05 EFS
Full Scale Error
—
—
<±1
LSb VREF = VDD ≥ 3.0V
A06 EOFF Offset Error
A10 —
Monotonicity⁽³⁾
—
—
<±1.5
guaranteed
LSb VREF = VDD ≥ 3.0V
— VSS ≤ VAIN ≤ VREF
A20 VREF
A20A
Reference Voltage
(VREFH – VREFL)
0V
—
3V
—
—
V
—
V For 10-bit resolution
A21 VREFH Reference Voltage High
VSS
— VDD + 0.3V V
A22 VREFL Reference Voltage Low
VSS – 0.3V —
VDD
V
A25 VAIN Analog Input Voltage
VSS – 0.3V — VREF + 0.3V V
A30 ZAIN Recommended Impedance of
—
Analog Voltage Source
—
10.0
kΩ
A40 IAD
A/D Conversion PIC18FXX8
—
180
Current (VDD) _PIC18LFXX8
—
90
—
µA Average current
—
µA ^{consumption when}
A/D is on (Note 1)
A50 IREF VREF Input Current (Note 2)
0
—
5
µA During VAIN acquisition.
Based on differential of
VHOLD to VAIN. To
charge CHOLD.
—
—
150
µA 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.
VREF current is from RA2/AN2/VREF- and RA3/AN3/VREF+ pins or VDD and VSS 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.
DS41159D-page 358
 2004 Microchip Technology Inc.