8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

8.1.1 Adjustable Hysteresis

As a result of a comparator’s high open loop gain, there is a small band of input differential voltage where the

output can toggle back and forth between “logic high” and “logic low” states. This can cause design challenges

for inputs with slow rise and fall times or systems with excessive noise. These challenges can be overcome by

adding hysteresis to the comparator.

Since the TLV3601 and TLV3602 only has a minimal amount of internal hysteresis, external hysteresis can be

applied in the form of a positive feedback loop that adjusts the trip point of the comparator depending on its

current output state. See the Implementing Hysteresis section for more details.

The TLV3603(E) on the other hand has a LE/HYS pin that can be used to increase or eliminate the internal

hysteresis of the comparator. In order to increase the internal hysteresis of the TLV3603(E), connect a single

resistor as shown in the adjusting hysteresis figure between the LE/HYS pin and VEE. A curve of hysteresis

versus resistance is provided below to provide guidance in setting the desired amount of hysteresis. Likewise,

for applications where no hysteresis is desired, the LE/HYS pin can be connected to VCC.

OUT

+

VEE

VCC

LE/HYS

IN+

IN

-

TLV3603

Figure 8-1. Adjustable Hysteresis with an External Resistor

RHYST (k)

0

200

400

600

800

1,000

0

10

20

30

40

50

60

70

80

-40

C

25

C

85

C

125

C

Figure 8-2. VHYST (mV) vs RHYST (kΩ), VCC = 5 V

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TLV3601, TLV3602, TLV3603, TLV3603E

SNOSDB1E – JUNE 2021 – REVISED APRIL 2023

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