TLV172IDCKT.B datasheet(16/49 Pages) TI2

16 / 49 page

Time (200 ms/div)

OUT

37 VPP

Sine Wave

(-18.5V)

VOUT

+18 V

-18 V

TLV172, TLV2172, TLV4172

SBOS784C – NOVEMBER 2016 – REVISED JANUARY 2019

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Product Folder Links: TLV172 TLV2172 TLV4172

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8.3 Feature Description

8.3.1 Operating Characteristics

The TLVx172 amplifier is specified for operation from 4.5 V to 36 V (±2.25 V to ±18 V). Many of the

specifications apply from –40°C to +125°C. Parameters that can exhibit significant variance with regard to

operating voltage or temperature are shown in the Typical Characteristics section.

8.3.2 Phase-Reversal Protection

The TLVx172 device has an internal phase-reversal protection. Many operational amplifiers exhibit a phase

reversal when the input is driven beyond the linear common-mode range. This condition is most often

encountered in noninverting circuits when the input is driven beyond the specified common-mode voltage range,

causing the output to reverse into the opposite rail. The input of the TLVx172 prevents phase reversal with

excessive common-mode voltage. Instead, the output limits into the appropriate rail. This performance is shown

in Figure 25.

Figure 25. No Phase Reversal

8.3.3 Electrical Overstress

Designers often ask questions about the capability of an operational amplifier to withstand electrical overstress.

These questions tend to focus on the device inputs, but can involve the supply voltage pins or even the output

pin. Each of these different pin functions have electrical stress limits determined by the voltage breakdown

characteristics of the particular semiconductor fabrication process and specific circuits connected to the pin.

Additionally, internal electrostatic discharge (ESD) protection is built into these circuits for protection from

accidental ESD events both before and during product assembly.

A good understanding of this basic ESD circuitry and the relevance to an electrical overstress event is helpful.

Figure 26 shows the ESD circuits contained in the TLVx172 (indicated by the dashed box). The ESD protection

circuitry involves several current-steering diodes connected from the input and output pins and routed back to the

internal power-supply lines, where the diodes meet at an absorption device internal to the operational amplifier.

This protection circuitry is intended to remain inactive during normal circuit operation.

TLV172IDCKT.B Datasheet(PDF) 16 Page - Texas Instruments