PIC18F2458 Datasheet, PDF (35/46 Pages) Microchip Technology – 28/40/44-Pin High-Performance, Enhanced Flash, USB Microcontrollers with 12-Bit A/D and nanoWatt Technology

PIC18F2458/2553/4458/4553
TABLE 4-1:
A/D CONVERTER CHARACTERISTICS: PIC18F2458/2553/4458/4553 (INDUSTRIAL)
PIC18LF2458/2553/4458/4553 (INDUSTRIAL)
Param
No.
Sym
Characteristic
Min
Typ
Max
Units
Conditions
A01 NR Resolution
—
—
12
bit
ΔVREF ≥ 3.0V
A03 EIL Integral Linearity Error
—
±1
±2.0
LSB VDD = 3.0V ΔVREF ≥ 3.0V
—
—
±2.0
LSB VDD = 5.0V
A04 EDL Differential Linearity Error
—
±1
+1.5/-1.0 LSB VDD = 3.0V ΔVREF ≥ 3.0V
—
—
+1.5/-1.0 LSB VDD = 5.0V
A06 EOFF Offset Error
—
±1
±5
LSB VDD = 3.0V ΔVREF ≥ 3.0V
—
—
±3
LSB VDD = 5.0V
A07 EGN Gain Error
—
±1
±1.25
LSB VDD = 3.0V ΔVREF ≥ 3.0V
A10 — Monotonicity
—
—
±2.00
Guaranteed⁽¹⁾
LSB VDD = 5.0V
—
VSS ≤ VAIN ≤ VREF
A20 ΔVREF Reference Voltage Range
3
(VREFH – VREFL)
—
VDD – VSS
V
For 12-bit resolution
A21 VREFH Reference Voltage High
VSS + 3.0V — VDD + 0.3V V
For 12-bit resolution
A22 VREFL Reference Voltage Low
VSS – 0.3V — VDD – 3.0V V
For 12-bit resolution
A25 VAIN Analog Input Voltage
VREFL
—
VREFH
V
A30 ZAIN Recommended
Impedance of Analog
Voltage Source
A50 IREF VREF Input Current⁽²⁾
—
—
2.5
kΩ
—
—
5
μA
—
—
150
μA
During VAIN acquisition.
During A/D conversion
cycle.
Note 1:
2:
The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
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/VREF-/CVREF pin or VSS, whichever is selected as the VREFL source.
© 2007 Microchip Technology Inc.
Preliminary
DS39887B-page 33