16F628 datasheet(140/168 Pages) MICROCHIP

140 / 168 page

PIC16F627A/628A/648A

DS40044A-page 138

Preliminary

 2002 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

IOFF

—

±5.0

±10

D301

Input Common Mode Voltage

ICM

0—

VDD - 1.5*

D302

Common Mode Rejection Ratio

CMRR

55*

—

D303

Response Time(1)

RESP

—

300

400

400*

600*

DD = 3.0V to 5.5V

-40° to +85°C

DD = 3.0V to 5.5V

-85° to +125°C

DD = 2.0V to 3.0V

-40° to +85°C

D304

Comparator Mode Change to

Output Valid

MC2OV

—

300

10*

µs

* 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

SS to VDD.

Operating Conditions: 2.0V < V

DD < 5.5V, -40

°C < TA < +125°C, unless otherwise stated.

Spec

No.

Characteristics

Sym

Min

Typ

Max

Units

Comments

D310

Resolution

RES

——

VDD/24

VDD/32

LSb

Low Range (VRR = 1)

High Range (VRR = 0)

D311

Absolute Accuracy

—

1/4(2)*

1/2(2)*

LSb

Low Range (VRR = 1)

High Range (VRR = 0)

D312

Unit Resistor Value (R)

—2k*

—

Ω

D313

Settling Time(1)

SET

—

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 V

DD is between 2.0V and 3.0V the VREF output voltage levels on RA2 descirbed by the equa-

tion:[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.

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