TLV9152SIRUGR datasheet(28/76 Pages) TI

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7.3.4 Common-Mode Voltage Range

The TLV915x is a 16-V, rail-to-rail input operational amplifier with an input common-mode range that extends

200 mV beyond either supply rail. This wide range is achieved with paralleled complementary N-channel and

P-channel differential input pairs, as shown in Figure 7-6. The N-channel pair is active for input voltages close to

the positive rail, typically (V+) – 1 V to 100 mV above the positive supply. The P-channel pair is active for inputs

from 100 mV below the negative supply to approximately (V+) – 2 V. There is a small transition region, typically

(V+) – 2 V to (V+) – 1 V in which both input pairs are on. This transition region can vary modestly with process

variation, and within this region PSRR, CMRR, offset voltage, offset drift, noise, and THD performance may be

degraded compared to operation outside this region.

Figure 6-5 shows this transition region for a typical device in terms of input voltage offset in more detail.

For more information on common-mode voltage range and PMOS/NMOS pair interaction, see Op Amps With

Complementary-Pair Input Stages application note.

NMOS

PMOS

NMOS

V-

V+

IN+

IN-

Figure 7-6. Rail-to-Rail Input Stage

7.3.5 Phase Reversal Protection

The TLV915x family has internal phase-reversal protection. Many op amps exhibit a phase reversal when the

input is driven beyond its linear common-mode range. This condition is most often encountered in non-inverting

circuits when the input is driven beyond the specified common-mode voltage range, causing the output to

reverse into the opposite rail. The TLV915x is a rail-to-rail input op amp; therefore, the common-mode range can

extend up to the rails. Input signals beyond the rails do not cause phase reversal; instead, the output limits into

the appropriate rail. This performance is shown in Figure 7-7. For more information on phase reversal, see Op

Amps With Complementary-Pair Input Stages application note.

Time (20us/div)

C016

Input

Output

Figure 7-7. No Phase Reversal

TLV9151, TLV9152, TLV9154

SBOS986D – OCTOBER 2019 – REVISED MAY 2021

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TLV9152SIRUGR Datasheet(PDF) 28 Page - Texas Instruments