Core

-In

+In

Clamp

1 kW

1 kW

−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

TLV3201

TLV3202

SBOS561A – MARCH 2012 – REVISED JUNE 2012

www.ti.com

APPLICATION INFORMATION

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

propagation delay on only 40 µA 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.

COMPARATOR INPUTS

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

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

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

inversion when the input pins exceed the supply voltage. Figure 25 shows the TLV320x response when input

voltages exceed the supply, resulting in no phase inversion.

Figure 25. No Phase Inversion: Comparator Response to Input Voltage (Prop Delay Included)

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

Ω series resistors

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

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

recommended, as shown in Figure 26. Large differential voltages greater than the supply voltage should be

avoided to prevent damage to the input stage.

Figure 26. TLV3201 equivalent input structure

10

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Product Folder Link(s): TLV3201 TLV3202