OPA340 datasheet(12/46 Pages) TI2

12 / 46 page

BIAS1

BIAS2

V +

V -

Class AB

Control

Circuitry

V-

(Ground)

V+

Reference

Current

V = +5, G = +1, R = 10kW

OUT

OPA340, OPA2340, OPA4340

SBOS073C – SEPTEMBER 1997 – REVISED AUGUST 2016

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Product Folder Links: OPA340 OPA2340 OPA4340

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7 Detailed Description

7.1 Overview

The OPA340 series operational amplifiers are fabricated on a state-of-the-art, 0.6-micron CMOS process. These

devices are unity-gain stable and suitable for a wide range of general-purpose applications. Rail-to-rail input and

output make them ideal for driving sampling A/D converters. In addition, excellent AC performance makes them

well-suited for audio applications. The class AB output stage is capable of driving 600-

Ω loads series and

extends 500 mV beyond the supply. Rail-to-rail input and output swing significantly increases dynamic range,

especially in low-supply applications. Figure 23 shows the input and output waveforms for the OPA340 in unity-

gain configuration. Operation is from a single 5-V supply with a 10-k

Ω load connected to V/2. The input is a 5-

VPP sinusoid. Output voltage is approximately 4.98 VPP. Power-supply pins must be bypassed with 0.01-µF

ceramic capacitors.

Figure 23. Rail-to-Rail Input and Output

7.2 Functional Block Diagram

OPA340 Datasheet(PDF) 12 Page - Texas Instruments