TLV9302 datasheet(21/55 Pages) TI

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7.3.6 Common-Mode Voltage Range

The TLV930x is a 40-V, rail-to-rail output operational amplifier with an input common-mode range that extends

100 mV beyond V– and within 2 V of V+ for normal operation. The device accomplishes this performance

through a complementary input stage, using a P-channel differential pair. Additionally, a complementary N-

channel differential pair has been included in parallel with the P-channel pair to eliminate common undesirable

op amp behaviors, such as phase reversal.

The TLV930x can operate with common mode ranges beyond 100 mV of the top rail, but with reduced

performance above (V+) – 2 V. 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 the

transition region and N-channel region, many specifications of the op amp, including PSRR, CMRR, offset

voltage, offset drift, noise and THD performance may be degraded compared to operation within the P-channel

region.

Table 7-2. Typical Performance for Common-Mode Voltages Within 2 V of the Positive Supply

PARAMETER

MIN

TYP

MAX

UNIT

Input common-mode voltage

(V+) – 2

(V+) + 0.1

Offset voltage

1.5

Offset voltage drift

µV/°C

Common-mode rejection

Open-loop gain

Gain-bandwidth product

0.7

MHz

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TLV9301, TLV9302, TLV9304

SBOS941C – FEBRUARY 2019 – REVISED FEBRUARY 2021

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TLV9302 Datasheet(PDF) 21 Page - Texas Instruments