TLC372

LinCMOS DUAL DIFFERENTIAL COMPARATORS

SLCS114E − NOVEMBER 1983 − REVISED JULY 2008

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

POSITIVE INPUT VOLTAGE

Figure 6

TA = 25°C

−0.9

−0.7

−0.5

Input Voltage (V)

0

−0.3

−1

−2

−3

−4

−5

−6

−7

−8

−9

−10

INPUT CURRENT

vs

NEGATIVE 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 | − 0.3 V

5 mA

NOTE A: If the correct output state is required when the negative input is less than GND, a schottky clamp is required.

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

 Comparator