TLV9022 datasheet(20/67 Pages) TI

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7 Detailed Description

7.1 Overview

The TLV902x and TLV903x devices are dual-channel, micro-power comparators with push-pull and open-drain

outputs and low input offset voltage. Operating down to 1.65 V while only consuming only 16 µA per channel,

the TLV902x and TLV903x are ideally suited for portable, automotive and industrial applications. An internal

power-on reset circuit ensures that the output remains in a known state during power-up and power-down while

fail-safe inputs can tolerate input transients without damage or false outputs.

7.2 Functional Block Diagram

OUT

IN+

IN-

Bias

Power-On

Reset

V+

V-

V+

SNAPBACK

ESD

CLAMPS

V-

Output

Control

V-

V+

* Push-Pull

Version Only

Power

Clamp

7.3 Feature Description

The TLV902x (open-drain output) and TLV903x (push-pull output) devices are micro-power comparators that

have low input offset voltages and are capable of operating at low voltages. The TLV90xx family feature a

rail-to-rail input stage capable of operating up to 200 mV beyond the power supply rails. The comparators also

feature push-pull and open-drain output stage options and Power-on Reset for known start-up conditions.

7.4 Device Functional Modes

7.4.1 Outputs

7.4.1.1 TLV9022 and TLV9024 Open Drain Output

The TLV902x features an open-drain (also commonly called open collector) sinking-only output stage enabling

the output logic levels to be pulled up to an external voltage from 0 V up to 5.5 V, independent of the comparator

supply voltage (VS). The open-drain output also allows logical OR'ing of multiple open drain outputs and logic

level translation. TI recommends setting the pull-up resistor current to between 100uA and 1mA. Lower pull-up

resistor values will help increase the rising edge risetime, but at the expense of increasing VOL and higher power

dissipation. The risetime will be dependant on the time constant of the total pull-up resistance and total load

capacitance. Large value pull-up resistors (>1 MΩ) will create an exponential rising edge due to the RC time

constant and increase the risetime.

Unused open drain outputs must be left floating, or can be tied to the V- pin if floating pins are not allowed. While

an individual output can typically sink up to 125 mA, the total combined current for all channels must be less than

200 mA.

TLV9020, TLV9021, TLV9022, TLV9024, TLV9030, TLV9031, TLV9032, TLV9034

SNOSDA3F – JUNE 2020 – REVISED MARCH 2023

www.ti.com

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Product Folder Links: TLV9020 TLV9021 TLV9022 TLV9024 TLV9030 TLV9031 TLV9032 TLV9034

TLV9022 Datasheet(PDF) 20 Page - Texas Instruments

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