
PIC16F87XA
DS39582B-page 194
2003 Microchip Technology Inc.
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
Analog Voltage Source
——
2.5
k
(Note 4)
A40
IAD
A/D Conversion
Current (VDD)
PIC16F87XA
—
220
—
A
Average current
consumption when A/D is
on (Note 1)
PIC16LF87XA
—
90
—
A
A50
IREF
VREF Input Current (Note 2)
—
5
150
A
During VAIN acquisition.
Based on differential of
VHOLD to VAIN to charge
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 k
. This requires higher acquisition time.