TLC372

LinCMOS DUAL DIFFERENTIAL COMPARATORS

SLCS114D − NOVEMBER 1983 − REVISED APRIL 2004

10

POST OFFICE BOX 655303

PRINCIPLES OF OPERATION

circuit-design considerations (continued)

Figure 5

VDD

0

Input Voltage − V

8

1

2

3

4

5

6

7

VDD + 4

VDD + 8

VDD + 12

TA = 25°C

INPUT CURRENT

vs

INPUT VOLTAGE

Figure 6

TA = 25°C

VDD − 0.9

VDD − 0.7

VDD − 0.5

Input Voltage − V

0

VDD − 0.3

1

2

3

4

5

6

7

8

9

10

INPUT CURRENT

vs

INPUT VOLTAGE

−

+

Vref

TLC372

RL

VDD

RI

See Note A

VI

Positive Voltage Input Current LImit:

Negative Voltage Input Current LImit:

RI =

+VI − VDD − 0.3 V

5 mA

RI =

−VI − VDD − (−0.3 V)

5 mA

NOTE A: If the correct output state is required when the negative input exceeds VSS, a schottky clamp is required.

Figure 7. Typical Input Current-Limiting Configuration for a LinCMOS

 Comparator