PIC18F87K22 Datasheet, PDF (520/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
TABLE 31-26: A/D CONVERTER CHARACTERISTICS: PIC18F87K22 FAMILY (INDUSTRIAL)
Param
No.
Sym
Characteristic
Min
Typ
Max
Units
Conditions
A01
A03
A04
A06
A07
A10
A20
A21
A22
A25
A30
A50
Note
NR Resolution
—
—
12
bit VREF  3.0V
EIL Integral Linearity Error
—
<±1
±2.0
LSB VDD = 3.0V (VREF 3.0V)
—
—
±2.0
LSB VDD = 5.0V
EDL Differential Linearity Error
—
<±1
+1.5/-1.0 LSB VDD = 3.0V (VREF 3.0V)
—
—
+1.5/-1.0 LSB VDD = 5.0V
EOFF Offset Error
—
<±1
±5
LSB VDD = 3.0V (VREF 3.0V)
—
—
±3
LSB VDD = 5.0V
EGN Gain Error
—
<±1
±1.25
LSB VDD = 3.0V (VREF 3.0V)
—
Monotonicity
—
—
±2.00
Guaranteed⁽¹⁾
LSB VDD = 5.0V
— VSS  VAIN  VREF
VREF Reference Voltage Range
3
(VREFH – VREFL)
—
VDD – VSS
V For 12-bit resolution
VREFH Reference Voltage High
VSS + 3.0V
—
VSS + 3.0V
V For 12-bit resolution
VREFL Reference Voltage Low
VSS – 0.3V
—
VSS – 3.0V
V For 12-bit resolution
VAIN Analog Input Voltage
VREFL
—
VREFH
V
ZAIN
IREF
Recommended
Impedance of Analog
Voltage Source
VREF Input Current⁽²⁾
—
—
2.5
k
—
—
5
A During VAIN acquisition.
—
—
150
A During A/D conversion cycle.
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/VREF-/CVREF pin or VSS, whichever is selected as the VREFL source.
DS39960B-page 520
Preliminary
 2010 Microchip Technology Inc.