PIC16F87XA Datasheet, PDF (196/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers

PIC16F87XA
TABLE 17-14: A/D CONVERTER CHARACTERISTICS:PIC16F873A/874A/876A/877A (INDUSTRIAL)
PIC16LF873A/874A/876A/877A (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
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
—
—
2.5
kΩ (Note 4)
Analog Voltage Source
A40 IAD A/D Conversion PIC16F87XA
—
220
—
µA Average current
Current (VDD)
PIC16LF87XA
—
90
—
µA ^{consumption when A/D is}
on (Note 1)
A50 IREF VREF Input Current (Note 2)
—
—
5
µA During VAIN acquisition.
Based on differential of
VHOLD to VAIN to charge
CHOLD, see Section 11.1
“A/D Acquisition
Requirements”.
—
—
150
µA During A/D conversion
cycle
* 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.
Note 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.
4: Maximum allowed impedance for analog voltage source is 10 kΩ. This requires higher acquisition time.
DS39582B-page 194
 2003 Microchip Technology Inc.