PIC16F684
TABLE 15-8: COMPARATOR VOLTAGE REFERENCE SPECIFICATIONS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +125°C
Voltage Reference Specifications
Sym.
Characteristics
Resolution
Min
Typ
Max Units
Comments
—
—
VDD/24*
VDD/32
—
—
LSb Low Range (VRR = 1)
LSb High Range (VRR = 0)
Absolute Accuracy
—
—
—
—
± 1/4*
± 1/2*
LSb Low Range (VRR = 1)
LSb High Range (VRR = 0)
Unit Resistor Value (R)
Settling Time(1)
—
—
2K*
—
—
Ω
10*
µs
*
These parameters are characterized but not tested.
Note 1: Settling time measured while VRR = 1and VR<3:0> transitions from ‘0000’ to ‘1111’.
TABLE 15-9: PIC16F684 A/D CONVERTER CHARACTERISTICS:
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40°C ≤ TA ≤ +125°C
Param
No.
Sym
NR
Characteristic
Resolution
Min
Typ†
Max
Units
Conditions
A01
—
—
—
—
10 bits
bit
A02
EABS Total Absolute
Error*(1)
±1
LSb VREF = 5.0V
A03
A04
EIL
Integral Error
—
—
—
—
±1
±1
LSb VREF = 5.0V
EDL
Differential Error
LSb No missing codes to 10 bits
VREF = 5.0V
A05
A06
A07
A10
EFS
Full-scale Range
2.2*
—
—
5.5*
±1
V
EOFF Offset Error
—
LSb VREF = 5.0V
LSb VREF = 5.0V
EGN
—
Gain Error
—
—
guaranteed(2)
—
±1
Monotonicity
—
—
—
V
VSS ≤ VAIN ≤ VREF+
A20
A20A
VREF Reference Voltage
2.2
2.5
—
VDD + 0.3
Absolute minimum to ensure 10-bit
accuracy
A25
A30
VAIN Analog Input
Voltage
VSS
—
—
—
VREF
10
V
ZAIN Recommended
Impedance of
Analog Voltage
Source
kΩ
A50
IREF
VREF Input
Current*(3)
10
—
—
—
1000
10
µA During VAIN acquisition.
Based on differential of VHOLD to
VAIN.
µA During A/D conversion cycle.
*
These parameters are characterized but not tested.
†
Data in ‘Typ’ column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1: Total Absolute Error includes integral, differential, offset and gain errors.
2: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
3: VREF current is from external VREF or VDD pin, whichever is selected as reference input.
4: When A/D is off, it will not consume any current other than leakage current. The power-down current
specification includes any such leakage from the A/D module.
DS41202C-page 144
Preliminary
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
