TLV9152SIRUGR datasheet(26/63 Pages) TI

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Time (20us/div)

C016

Input

Output

NMOS

PMOS

NMOS

V-

V+

IN+

IN-

TLV9151, TLV9152, TLV9154

SBOS986B – OCTOBER 2019 – REVISED MAY 2020

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Product Folder Links: TLV9151 TLV9152 TLV9154

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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 47. 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 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.

Figure 47. 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 48. For more information on phase reversal, see Op

Amps With Complementary-Pair Input Stages application note.

Figure 48. No Phase Reversal

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