TLC3704, TLC3704Q

QUAD MICROPOWER LinCMOS

 VOLTAGE COMPARATORS

SLCS117B – NOVEMBER 1986 – REVISED JANUARY 2002

10

POST OFFICE BOX 655303

PRINCIPLES OF OPERATION

circuit-design considerations (continued)

Figure 2

VDD

VDD + 4

VDD + 8

VDD + 12

VI – Input Voltage – V

INPUT CURRENT

vs

INPUT VOLTAGE

TA = 25° C

8

7

6

5

4

3

2

1

0

Figure 3

VDD – 0.3

VI – Input Voltage – V

INPUT CURRENT

vs

INPUT VOLTAGE

TA = 25° C

VDD – 0.5

VDD – 0.7

VDD – 0.9

10

9

8

7

6

5

4

3

2

1

0

+

–

1/2

TLC3704

Vref

VI

VDD

See Note A

RI

NOTE A: If the correct input state is required when the negative input exceeds GND, a Schottky clamp is required.

Negative Voltage Input Current Limit :

R

* V

5mA

R

V

5mA

Positive Voltage Input Current Limit :

Figure 4. Typical Input Current-Limiting Configuration for a LinCMOS Comparator