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PIC18F87K90 Datasheet, PDF (538/566 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt XLP Technology | |||
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PIC18F87K90 FAMILY
TABLE 31-25: A/D CONVERTER CHARACTERISTICS: PIC18F87K90 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
â
â
12
bit ïVREF ï³ 3.0V
EIL Integral Linearity Error
â
<±1
±2.0
LSB VDD = 3.0V (ïVREF ï³ï 3.0V)
â
â
±2.0
LSB VDD = 5.0V
EDL Differential Linearity Error
â
<±1
+1.5/-1.0 LSB VDD = 3.0V (ïVREF ï³ï 3.0V)
â
â
+1.5/-1.0 LSB VDD = 5.0V
EOFF Offset Error
â
<±1
±5
LSB VDD = 3.0V (ïVREF ï³ï 3.0V)
â
â
±3
LSB VDD = 5.0V
EGN Gain Error
â
<±1
±1.25
LSB VDD = 3.0V (ïVREF ï³ï 3.0V)
â
Monotonicity
â
â
±2.00
Guaranteed(1)
LSB VDD = 5.0V
â VSS ï£ VAIN ï£ VREF
ïVREF Reference Voltage Range
3
(VREFH â VREFL)
â
VDD â VSS
V For 12-bit resolution
VREFH Reference Voltage High
VSS + 3.0V
â
VSS + 3.0V
V For 12-bit resolution
VREFL Reference Voltage Low
VSS â 0.3V
â
VSS â 3.0V
V For 12-bit resolution
VAIN Analog Input Voltage
VREFL
â
VREFH
V
ZAIN
IREF
Recommended
Impedance of Analog
Voltage Source
VREF Input Current(2)
â
â
2.5
kï
â
â
5
ïA During VAIN acquisition.
â
â
150
ïA 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.
DS39957B-page 538
Preliminary
ï£ 2010 Microchip Technology Inc.
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