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Typical Applications (VCC=5V)

These quad comparators feature high gain, wide bandwidth characteristic. This gives the device oscillation

tendencies if the outputs are capacitively coupled to the inputs via stray capacitance.

This oscillation manifests itself during output transitions (VOL to VOH). To alleviate this situation, input resistors＜

10kΩ should be used.

The addition of positive feedback (＜10mV) is also recommended. It is good design practice to ground all unused

pins.

Differential input voltages may be larger than supply voltage without damaging the comparator’s input. Voltage is

more negative than -0.3V should not be used.

Inverting Comparator With Hysteresis

+VCC

+VCC

VIN

VOUT

VREF

RREF

R3

10k

R2

R1

R2 ＞＞ RREF Ι Ι R1

R3

≒ R1 ΙΙ RREF ΙΙ R2

VREF

≒ VCC × R1 / ( RREF + R1 )

Amount of Hysteresis

VH = (R1 Ι Ι RREF / R1 Ι Ι RREF + R2)

× [ VOUT(MAX) - VOUT(MIN)]

Non-Inverting Comparator With Hysteresis

+VCC

VIN

VOUT

RREF

10k

R3

R2

R1

VREF

R2

≒ RREF ΙΙ R1

R3

≒ R1 ΙΙ RREF ΙΙ R2

VREF

≒ VCC × R1 / ( RREF + R1 )

Amount of Hysteresis

VH = [ R2 / ( R2 + R3 ) ]

× [ VOUT(MAX) - VOUT(MIN) ]