
PIC16F627A/628A/648A
DS40044A-page 138
Preliminary
2002 Microchip Technology Inc.
TABLE 17-2:
COMPARATOR SPECIFICATIONS
Operating Conditions: 2.0V
<
V
DD
<
5.5V, -40°C < T
A
< +125°C, unless otherwise stated.
TABLE 17-3:
VOLTAGE REFERENCE SPECIFICATIONS
Operating Conditions: 2.0V < V
DD
< 5.5V, -40
°
C < T
A
< +125
°
C, unless otherwise stated.
Param
No.
Characteristics
Sym
Min
Typ
Max
Units
Comments
D300
Input Offset Voltage
V
IOFF
—
±
5.0
±
10
mV
D301
Input Common Mode Voltage
V
ICM
0
—
V
DD
- 1.5*
V
D302
Common Mode Rejection Ratio
CMRR
55*
—
—
db
D303
Response Time
(1)
T
RESP
—
—
—
300
400
400
400*
600*
600*
ns
ns
ns
V
DD
= 3.0V to 5.5V
-40° to +85°C
V
DD
= 3.0V to 5.5V
-85° to +125°C
V
DD
= 2.0V to 3.0V
-40° to +85°C
D304
Comparator Mode Change to
Output Valid
T
MC
2
OV
—
300
10*
μ
s
* These parameters are characterized but not tested.
Note 1:
Response time measured with one comparator input at (V
DD
-
1.5)/2 while the other input transitions from
V
SS
to V
DD
.
Spec
No.
Characteristics
Sym
Min
Typ
Max
Units
Comments
D310
Resolution
V
RES
—
—
V
DD
/24
V
DD
/32
1/4
(2)
*
1/2
(2)
*
LSb
LSb
Low Range (VRR = 1)
High Range (VRR = 0)
D311
Absolute Accuracy
VR
AA
—
—
—
—
LSb
LSb
Low Range (VRR = 1)
High Range (VRR = 0)
D312
Unit Resistor Value (R)
VR
UR
—
2k*
—
D313
Settling Time
(1)
T
SET
—
—
10*
μ
s
*
These parameters are characterized but not tested.
Note 1:
Settling time measured while VRR = 1 and VR<3:0> transitions from
0000
to
1111
.
2:
When V
DD
is between 2.0V and 3.0V the V
REF
output voltage levels on RA2 descirbed by the equa-
tion:[V
DD
/2 ± (3-V
DD
)/2] may cause the Absolute Accuracy (VR
AA
) of the V
REF
output signal on RA2 to be
greater than the stated max.