Datasheet

 2010-2015 Microchip Technology Inc. DS40001303H-page 385
PIC18F2XK20/4XK20
TABLE 26-35: A/D CONVERTER CHARACTERISTICS:PIC18F2XK20/4XK20
Param.
No.
Symbol Characteristic Min. Typ. Max. Units Conditions
A01 N
R Resolution — — 10 bits -40°C to +85°C,
V
REF  2.0V
A03 EIL Integral Linearity Error — ±0.5 ±1 LSb -40°C to +85°C,
V
REF  2.0V
A04 EDL Differential Linearity Error — ±0.4 ±1 LSb -40°C to +85°C,
V
REF  2.0V
A06 E
OFF Offset Error — 0.4 ±2 LSb -40°C to +85°C,
V
REF  2.0V
A07 EGN Gain Error — 0.3 ±2 LSb -40°C to +85°C,
V
REF  2.0V
A08 ETOTL Total Error — 1 ±3 LSb -40°C to +85°C,
V
REF  2.0V
A20 V
REF Reference Voltage Range
(V
REFH – VREFL)
1.8
2.0
—
—
—
—
V
V
A
Bsolute Minimum
Minimum for 1LSb
Accuracy
A21 V
REFH Reference Voltage High VDD/2 — VDD + 0.3 V
A22 VREFL Reference Voltage Low VSS – 0.3V — VDD/2 V
A25 VAIN Analog Input Voltage VREFL —VREFH V
A30 Z
AIN Recommended Impedance of
Analog Voltage Source
—— 3k -40°C to +85°C
Note 1: The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
2: V
REFH current is from RA3/AN3/VREF+ pin or VDD, whichever is selected as the VREFH source.
V
REFL current is from RA2/AN2/VREF-/CVREF pin or VSS, whichever is selected as the VREFL source.