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

The TLV3201 and TLV3202 are single- and dual-supply (respectively), push-pull comparators featuring 40ns of

propagation delay on only 40µA of supply current. This combination of fast response time and minimal power

consumption make the TLV3201 and TLV3202 excellent comparators for portable, battery-powered applications

as well as fast-switching threshold detection such as pulse-width modulation (PWM) output monitors and zero-

cross detection.

8.1.1 Comparator Inputs

The TLV3201 and TLV3202 are rail-to-rail input comparators, with an input common-mode range that exceeds

the supply rails by 200mV for both positive and negative supplies. The devices are specified from 2.7V to 5.5V,

with room temperature operation from 2.5V to 5.5V. The TLV3201 and TLV3202 are designed to prevent phase

inversion when the input pins exceed the supply voltage. Figure 8-1 shows the TLV320x response when input

voltages exceed the supply, resulting in no phase inversion.

−5

−4

−3

−2

−1

0

1

2

3

4

5

0

20

40

60

80

100

120

140

160

180

200

Time (ns)

Output Voltage

Input Voltage

G000

Figure 8-1. No Phase Inversion: Comparator Response to Input Voltage (Propagation Delay Included)

The electrostatic discharge (ESD) protection input structure of two back-to-back diodes and 1kΩ series resistors

are used to limit the differential input voltage applied to the precision input of the comparator by clamping

input voltages that exceed VCC beyond the specified operating conditions. If potential overvoltage conditions

that exceed absolute maximum ratings are present, the addition of external bypass diodes and resistors is

recommended, as shown in Figure 8-2. Large differential voltages greater than the supply voltage must be

avoided to prevent damage to the input stage.

Core

-In

+In

Clamp

1 kW

1 kW

Copyright © 2016, Texas Instruments Incorporated

Figure 8-2. TLV3201 Equivalent Input structure

TLV3201, TLV3202

SBOS561C – MARCH 2012 – REVISED MAY 2024

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