OPA350 datasheet(12/44 Pages) TI2

12 / 44 page

Reference

Current

V+

IN-

IN+

(Ground)

BIAS2

BIAS1

Class AB

Control

Circuitry

OPA350, OPA2350, OPA4350

SBOS099D – SEPTEMBER 2000 – REVISED DECEMBER 2015

www.ti.com

7 Detailed Description

7.1 Overview

The OPA350 series rail-to-rail CMOS operational amplifiers are optimized for low voltage, single-supply

operation. Rail-to-rail input and output, low noise (5 nV/

√Hz), and high speed operation (38 MHz, 22 V/μs) make

the amplifiers ideal for driving sampling Analog-to-Digital (A/D) converters. They are also suited for cell phone PA

control loops and video processing (75-

Ω drive capability), as well as audio and general purpose applications.

Single, dual, and quad versions have identical specifications for maximum design flexibility.

7.2 Functional Block Diagram

7.3 Feature Description

The OPA350 series of operational amplifiers (op amps) are fabricated on a state-of-the-art 0.6 micron CMOS

process. They 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. They are also suited for controlling the

output power in cell phones. These applications often require high speed and low noise. In addition, the OPA350

series offers a low-cost solution for general-purpose and consumer video applications (75-

Ω drive capability).

Excellent AC performance makes the OPA350 series suited for audio applications. Their bandwidth, slew rate,

low noise (5 nV/

√Hz), low THD (0.0006%), and small package options are ideal for these applications. The class

AB output stage is capable of driving 600-

Ω loads connected to any point between V+ and ground.

Rail-to-rail input and output swing significantly increases dynamic range, especially in low voltage supply

applications. Figure 25 shows the input and output waveforms for the OPA350 in unity-gain configuration.

Operation is from a single 5-V supply with a 1-k

Ω load connected to VS/2. The input is a 5 VPP sinusoid. Output

voltage swing is approximately 4.95 VPP.

Power supply pins should be bypassed with 0.01-

μF ceramic capacitors.

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Product Folder Links: OPA350 OPA2350 OPA4350

OPA350 Datasheet(PDF) 12 Page - Texas Instruments

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