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TLVx376

Copyright © 2016, Texas Instruments Incorporated

12

TLV376, TLV2376, TLV4376

SBOS755 – OCTOBER 2016

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Product Folder Links: TLV376 TLV2376 TLV4376

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Copyright © 2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TLVx376 family belongs to a new generation of low-noise operational amplifiers with e-trim™, giving

customers outstanding dc precision and ac performance. Low noise, rail-to-rail input and output, and low offset,

drawing a low quiescent current, make these devices ideal for a variety of precision and portable applications. In

addition, this family of devices have a wide supply range with excellent PSRR, making the TLVx376 a suitable

option for applications that are battery-powered without regulation.

7.2 Functional Block Diagram

7.3 Feature Description

The TLVx376 family of precision amplifiers offers excellent dc performance as well as excellent ac performance.

Operating from a single power supply, the TLVx376 is capable of driving large capacitive loads, has a wide input

common-mode voltage range, and is well-suited to drive the inputs of successive-approximation register (SAR)

analog-to-digital converters (ADCs) as well as 24-bit and higher resolution converters. All devices feature internal

ESD protection. The TLVx376 family is offered in a variety of industry-standard packages for applications that

require space savings.

7.3.1 Operating Voltage

The TLVx376 family of amplifiers operate over a power-supply range of 2.2 V to 5.5 V (±1.1 V to ±2.75 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 presented in the Typical Characteristics section.

7.3.2 Capacitive Load and Stability

The TLVx376 series of amplifiers can be used in applications where driving a capacitive load is required. As with

all op amps, there can be specific instances where the TLVx376 can become unstable, leading to oscillation. The

particular op amp circuit configuration, layout, gain, and output loading are some of the factors to consider when

establishing whether an amplifier is stable in operation or not. An op amp in the unity-gain (+1 V/V) buffer

configuration and driving a capacitive load exhibits a greater tendency to be unstable than an amplifier operated

at a higher noise gain. The capacitive load, in conjunction with the op amp output resistance, creates a pole

within the feedback loop that degrades the phase margin. The phase margin reduces when the capacitive

loading increases.