Datasheet

PIC16F627A/628A/648A
DS40044G-page 142 © 2009 Microchip Technology Inc.
TABLE 17-2: COMPARATOR SPECIFICATIONS
TABLE 17-3: VOLTAGE REFERENCE SPECIFICATIONS
Operating Conditions: 2.0V < VDD <5.5V, -40°C < TA < +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 VICM 0—VDD – 1.5* V
D302 Common Mode Rejection Ratio CMRR 55* — — db
D303 Response Time
(1)
TRESP —
—
—
300
400
400
400*
600*
600*
ns
ns
ns
VDD = 3.0V to 5.5V
-40° to +85°C
VDD = 3.0V to 5.5V
-85° to +125°C
VDD = 2.0V to 3.0V
-40° to +85°C
D304 Comparator Mode Change to
Output Valid
T
MC2OV —300 10* μs
* These parameters are characterized but not tested.
Note 1: Response time measured with one comparator input at (VDD – 1.5)/2, while the other input transitions from
V
SS to VDD.
Operating Conditions: 2.0V < VDD < 5.5V, -40°C < TA < +125°C, unless otherwise stated.
Spec
No.
Characteristics Sym Min Typ Max Units Comments
D310 Resolution V
RES ——VDD/24
V
DD/32
LSb
LSb
Low Range (VRR = 1)
High Range (VRR = 0)
D311 Absolute Accuracy V
RAA —
—
—
—
1/4
(2)
*
1/2
(2)
*
LSb
LSb
Low Range (VRR = 1)
High Range (VRR = 0)
D312 Unit Resistor Value (R) VRUR —2k*— Ω
D313 Settling Time
(1)
TSET ——10*μs
* 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 VDD is between 2.0V and 3.0V, the VREF output voltage levels on RA2 described by the
equation:[V
DD/2 ± (3 – VDD)/2] may cause the Absolute Accuracy (VRAA) of the VREF output signal on RA2
to be greater than the stated max.