PIC16F872_06 Datasheet, PDF (138/168 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS Flash Microcontroller with 10-Bit A/D

PIC16F872
TABLE 14-9: A/D CONVERTER CHARACTERISTICS:
PIC16F872 (COMMERCIAL, INDUSTRIAL, EXTENDED)
PIC16LF872 (COMMERCIAL, INDUSTRIAL)
Param
No.
Sym
Characteristic
Min
Typ†
Max
Units
Conditions
A01 NR Resolution
—
—
10-bits
bit VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A03 EIL Integral Linearity Error
—
—
<±1
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A04 EDL Differential Linearity Error
—
—
<±1
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A06 EOFF Offset Error
—
—
<±2
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A07 EGN Gain Error
—
—
<±1
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A10 — Monotonicity
—
guaranteed⁽³⁾
—
— VSS ≤ VAIN ≤ VREF
A20 VREF Reference Voltage (VREF+ - VREF-)
2.0
—
VDD + 0.3 V Absolute minimum electrical
spec. to ensure 10-bit
accuracy.
A21 VREF+ Reference Voltage High
AVDD - 2.5V
AVDD + 0.3V V
A22 VREF- Reference Voltage Low
AVSS - 0.3V
VREF+ - 2.0V V
A25 VAIN Analog Input Voltage
VSS - 0.3V
—
VREF + 0.3V V
A30 ZAIN Recommended Impedance of
—
Analog Voltage Source
—
10.0
kΩ
A40 IAD A/D Conversion
Standard
—
220
—
μA Average current consumption
Current (VDD)
Extended
—
90
—
μA ^{when A/D is on (Note 1).}
A50 IREF VREF Input Current (Note 2)
10
—
1000
μA During VAIN acquisition,
based on differential of VHOLD
to VAIN to charge CHOLD, see
Section 10.1.
—
—
10
μA During A/D conversion cycle.
Note
* These parameters are characterized but not tested.
† Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
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: VREF current is from RA3 pin or VDD pin, whichever is selected as reference input.
3: The A/D conversion result never decreases with an increase in the input voltage, and has no missing codes.
DS30221C-page 136
© 2006 Microchip Technology Inc.