PIC18F4321 Datasheet, PDF (365/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F4321 FAMILY
TABLE 26-24: A/D CONVERTER CHARACTERISTICS: PIC18F2221/2321/4221/4321 (INDUSTRIAL)
PIC18LF2221/2321/4221/4321 (INDUSTRIAL)
Param
No.
Symbol
Characteristic
Min
Typ
Max Units
Conditions
A01 NR
Resolution
—
—
10
bit ΔVREF ≥ 3.0V
A03 EIL
Integral Linearity Error
—
—
<±1
LSb ΔVREF ≥ 3.0V
A04 EDL Differential Linearity Error
—
—
<±1
LSb ΔVREF ≥ 3.0V
A06 EOFF Offset Error
—
—
<±1.5
LSb ΔVREF ≥ 3.0V
A07 EGN
A10 —
Gain Error
Monotonicity
—
—
<±1
Guaranteed⁽¹⁾
LSb ΔVREF ≥ 3.0V
— VSS ≤ VAIN ≤ VREF
A20 ΔVREF Reference Voltage Range
(VREFH – VREFL)
1.8
—
3
—
—
V VDD < 3.0V
—
V VDD ≥ 3.0V
A21 VREFH Reference Voltage High
—
— VDD + 3.0V V
A22 VREFL Reference Voltage Low
VSS – 0.3V —
—
V
A25 VAIN Analog Input Voltage
VREFL
—
VREFH
V
A30 ZAIN Recommended Impedance of
—
—
2.5
kΩ
Analog Voltage Source
A50 IREF VREF Input Current⁽²⁾
—
—
5
μA During VAIN acquisition.
—
—
150
μA 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 RA3/AN3/VREF+ pin or VDD, whichever is selected as the VREFH source.
VREFL current is from RA2/AN2/VREF-/CVREF pin or VSS, whichever is selected as the VREFL source.
© 2007 Microchip Technology Inc.
Preliminary
DS39689E-page 363