Datasheet

 2010-2012 Microchip Technology Inc. DS39977F-page 579
PIC18F66K80 FAMILY
TABLE 31-25: A/D CONVERTER CHARACTERISTICS: PIC18F66K80 FAMILY
(INDUSTRIAL/EXTENDED)
Param
No.
Sym Characteristic Min Typ Max Units Conditions
A01 NR Resolution — — 12 bit VREF  3.0V
A03 E
IL Integral Linearity Error — — ±6.0 LSB VDD = 5.0V
A04 E
DL Differential Linearity Error — ±1 +3.0/-1.0 LSB VDD = 5.0V
A06 E
OFF Offset Error — ±1 ±9 LSB VDD = 5.0V
A07 E
GN Gain Error — <±1 ±8.00 LSB VDD = 5.0V
A10 — Monotonicity Guaranteed
(1)
—VSS  VAIN  VREF
A20 VREF Reference Voltage Range
(V
REFH – VREFL)
3—V
DD – VSS V For 12-bit resolution
A21 V
REFH Reference Voltage High AVSS + 3.0V — AVDD + 0.3V V For 12-bit resolution
A22 V
REFL Reference Voltage Low AVSS – 0.3V — AVDD – 3.0V V For 12-bit resolution
A25 V
AIN Analog Input Voltage VREFL —VREFH V
A28 AVDD Analog Supply Voltage VDD – 0.3 — VDD + 0.3 V
A29 AVSS Analog Supply Voltage VSS – 0.3 — VSS + 0.3 V
A30 Z
AIN Recommended
Impedance of Analog
Voltage Source
——2.5k
A50 IREF VREF Input Current
(2)
—
—
—
—
5
150
A
A
During V
AIN acquisition.
During A/D conversion cycle.
Note 1: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
2: VREFH current is from the RA3/AN3/VREF+ pin or VDD, whichever is selected as the VREFH source. VREFL current is from
the RA2/AN2/V
REF-/CVREF pin or VSS, whichever is selected as the VREFL source.