PIC16F87XA
TABLE 17-14: A/D CONVERTER CHARACTERISTICS:PIC16F873A/874A/876A/877A (INDUSTRIAL)
PIC16LF873A/874A/876A/877A (INDUSTRIAL)
Param
No.
Sym
NR
Characteristic
Resolution
Min
—
Typ†
—
Max
10-bits
< ± 1
< ± 1
< ± 2
< ± 1
Units
Conditions
A01
bit VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
A03
A04
A06
A07
EIL
Integral linearity error
—
—
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
EDL
Differential linearity error
—
—
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
EOFF Offset error
—
—
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
EGN
Gain error
—
—
LSb VREF = VDD = 5.12V,
VSS ≤ VAIN ≤ VREF
(3)
A10
A20
—
Monotonicity
—
guaranteed
—
—
—
V
VSS ≤ VAIN ≤ VREF
VREF Reference voltage (VREF+ - VREF-)
2.0
VDD + 0.3
Absolute minimum electrical
spec. To ensure 10-bit
accuracy.
A21
A22
A25
A30
VREF+ Reference voltage High
VREF- Reference voltage Low
AVDD - 2.5V
AVSS - 0.3V
VSS - 0.3 V
—
AVDD + 0.3V
VREF+ - 2.0V
VREF + 0.3 V
10.0
V
V
VAIN
ZAIN
Analog input voltage
—
—
V
Recommended impedance of
analog voltage source
kΩ
A40
A50
IAD
A/D conversion
current (VDD)
Standard
Extended
—
—
10
220
90
—
—
µA Average current consumption
when A/D is on (Note 1)
µA
IREF
VREF input current (Note 2)
—
1000
µA During VAIN acquisition.
Based on differential of
VHOLD to VAIN to charge
CHOLD, see Section 11.1.
—
—
10
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.
DS39582A-page 192
AdvanceInformation
2001 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
