PIC18F2220_07 Datasheet, PDF (341/386 Pages) Microchip Technology – 28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2220/2320/4220/4320
TABLE 26-24: A/D CONVERTER CHARACTERISTICS: PIC18F2220/2320/4220/4320 (INDUSTRIAL)
PIC18F2220/2320/4220/4320 (EXTENDED)
PIC18LF2220/2320/4220/4320 (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
LSb ΔVREF ≥ 3.0V
A07 EGN Gain Error
—
—
<±1
LSb ΔVREF ≥ 3.0V
A10 —
Monotonicity
guaranteed⁽²⁾
—
A20 ΔVREF Reference Voltage Range
(VREFH – VREFL)
3
— AVDD – AVSS V For 10-bit resolution
A21 VREFH 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 VAIN Analog Input Voltage
VREFL
—
VREFH
V
A28 AVDD Analog Supply Voltage
VDD – 0.3 —
VDD + 0.3 V Tie to VDD
A29 AVSS Analog Supply Voltage
VSS – 0.3 —
A30 ZAIN Recommended Impedance of
—
—
Analog Voltage Source
A40 IAD
A/D Current PIC18FXX20
—
—
from VDD
PIC18LFXX20
—
—
A50 IREF VREF Input Current ⁽³⁾
—
—
—
—
VSS + 0.3
2.5⁽⁴⁾
180⁽⁵⁾
90⁽⁵⁾
±5⁽⁵⁾
±150⁽⁵⁾
V Tie to VSS
kΩ
μA Average current during
μA ^{conversion(1)}
μA During VAIN acquisition.
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
spec includes any such leakage from the A/D module.
2: The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
3: VREFH current is from RA3/AN3/VREF+ pin or AVDD, whichever is selected as the VREFH source.
VREFL current is from RA2/AN2/VREF- pin or AVSS, whichever is selected as the VREFL source.
4: Assume quiet environment. If adjacent pins have high-frequency signals (analog or digital), ZAIN may need
to be reduced to as low as 1 kΩ to fight crosstalk effects.
5: For guidance only.
© 2007 Microchip Technology Inc.
DS39599F-page 339