TLV9032DDFR.A datasheet(23/85 Pages) TI2

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6.4.3 ESD Protection

The TLV90xx family incorporates internal ESD protection circuits on all pins. The inputs, and the open-drain

output, use a proprietary "snapback" type ESD clamp from each pin to V-, which allows the pins to exceed the

supply voltage (V+). While shown as Zener diodes, snapback "short" and go low impedance (like an SCR) when

the threshold is exceeded, as opposed to clamping to a defined voltage like a Zener.

The TLV902x open-drain output protection also consists of a ESD clamp between the output and V- to allow the

output to be pulled above V+ to a maximum of 5.5V.

The TLV903x push-pull output protection consists of a ESD clamp between the output and V-, but also includes

a ESD diode clamp to V+, as the output must not exceed the supply rails.

If the inputs are to be connected to a low impedance source, TI recommends adding a current-limiting resistor

in series with the input to limit input currents when the clamps conduct. The current must be limited 10mA

or less. This series resistance can be part of any resistive input dividers or networks. TI does not specify the

performance of the ESD clamps and external clamping must be added if the inputs or output can exceed the

maximum ratings as part of normal operation.

6.4.4 Unused Inputs

If a channel is not to be used, DO NOT tie the inputs together. Due to the high equivalent bandwidth and low

offset voltage, tying the inputs directly together can cause high frequency oscillations as the device triggers on

it's own internal wideband noise. Instead, the inputs must be tied to any available voltage that resides within the

specified input voltage range and provides a minimum of 50mV differential voltage. For example, one input can

be grounded and the other input connected to a reference voltage, or even V+ as long as the input is directly

connected to the V+ pin to avoid transients.

6.4.5 Hysteresis

The TLV90xx family does not have internal hysteresis. Due to the wide effective bandwidth and low input offset

voltage, there is a possibility for the output to "chatter" (oscillate) when the absolute differential voltage near zero

as the comparator triggers on internal wideband noise. This is normal comparator behavior and is expected. TI

recommends that the user add external hysteresis if slow moving signals are expected. See Section 7.1.2 in the

following section.

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

SNOSDA3H – JUNE 2020 – REVISED NOVEMBER 2025

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TLV9032DDFR.A 数据表(PDF) 23 Page - Texas Instruments