PIC16F87 Datasheet, PDF (190/214 Pages) Microchip Technology – 18/20/28-Pin Enhanced FLASH Microcontrollers with nanoWatt Technology

PIC16F87/88
TABLE 18-13: A/D CONVERTER CHARACTERISTICS: PIC16F87/88 (INDUSTRIAL, EXTENDED)
PIC16LF87/88 (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⁽³⁾
—
guaranteed
—
— VSS ≤ VAIN ≤ VREF
A20 VREF Reference Voltage
2.5
—
VDD + 0.3 V -40°C to +85°C
2.2
—
VDD + 0.3 V 0°C to +85°C
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
A50 IREF VREF input current⁽²⁾
—
—
—
2.5
kΩ See (Note 4)
—
5
µA During VAIN acquisition.
Based on differential of VHOLD to
VAIN to charge CHOLD, see
Section 12.1 “A/D Acquisition
Requirements”.
—
500
µA During A/D Conversion cycle.
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: VREF current is from RA3 pin or VDD pin, whichever is selected as reference input.
2: The A/D conversion result never decreases with an increase in the input voltage, and has no missing codes.
3: The maximum allowed impedance for analog voltage source is 10 kΩ. This requires higher acquisition times.
DS30487B-page 188
Preliminary
 2003 Microchip Technology Inc.