Datasheet

PIC18F6390/6490/8390/8490
DS39629C-page 384 © 2007 Microchip Technology Inc.
TABLE 26-23: A/D CONVERTER CHARACTERISTICS: PIC18F6390/6490/8390/8490 (INDUSTRIAL)
PIC18LF6390/6490/8390/8490 (INDUSTRIAL)
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
A01 NR Resolution — — 10 bit ΔVREF ≥ 3.0V
A03 E
IL Integral Linearity Error — — <±1 LSb ΔVREF ≥ 3.0V
A04 EDL Differential Linearity Error — — <±1 LSb ΔVREF ≥ 3.0V
A06 EOFF Offset Error — — <±1 LSb ΔVREF ≥ 3.0V
A07 E
GN Gain Error — — <±1 LSb ΔVREF ≥ 3.0V
A10 — Monotonicity Guaranteed
(1)
—
A20 ΔVREF Reference Voltage Range
(V
REFH – VREFL)
3—AV
DD – AVSS V For 10-bit resolution
A21 V
REFH Reference Voltage High AVSS + 3.0V — AVDD + 0.3V V For 10-bit resolution
A22 VREFL Reference Voltage Low AVSS – 0.3V — AVDD – 3.0V V For 10-bit resolution
A25 V
AIN Analog Input Voltage VREFL —VREFH V
A30 Z
AIN Recommended Impedance of
Analog Voltage Source
——2.5kΩ
A50 I
REF VREF Input Current (Note 2) —
—
—
—
±5
±150
μA
μA
During VAIN 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: V
REFH current is from RA3/AN3/VREF+/SEG17 pin or AVDD, whichever is selected as the VREFH source.
V
REFL current is from RA2/AN2/VREF-/SEG16 pin or AVSS, whichever is selected as the VREFL source.