Texas Instruments SLOU023A Manuale utente

TPA112 MSOP

Audio Power Amplifier

Evaluation Module

2001 Mixed-Signal Products

User’s Guide

SLOU023A

IMPORTANT NOTICE

TexasInstruments andits subsidiaries(TI) reservethe rightto makechanges totheir productsor todiscontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its products to the specifications applicable at the time of sale in accordance with

TI’sstandardwarranty.TestingandotherqualitycontroltechniquesareutilizedtotheextentTIdeemsnecessary

to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except

those mandated by government requirements.

Customers are responsible for their applications using TI components.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TIassumesnoliabilityforapplicationsassistance orcustomer productdesign. TIdoes notwarrantorrepresent

thatanylicense,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother

intellectual property right of TI covering or relating to any combination, machine, or process in which such

products or services might be or are used. TI’s publication of information regarding any third party’s products

or services does not constitute TI’s approval, license, warranty or endorsement thereof.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alterationand isaccompanied byall associatedwarranties,conditions,limitationsandnotices. Representation

or reproduction of this information with alteration voids all warranties provided for an associated TI product or

service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.

Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for

that product or service voids all express and any implied warranties for the associated TI product or service,

is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use.

Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

iii

Chapter Title—Attribute Reference

Preface

Related Documentation From Texas Instruments

TI Plug-N-Play Audio Amplifier Evaluation Platform (literature

number SLOU011) provides detailed information on the evaluation

platform and its use with TI audio evaluation modules.

TPA112 150-mW Stereo Audio Power Amplifier (literature

number SLOS212) This is the data sheet for the TPA112 audio

amplifier integrated circuit.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It

generates, uses, and can radiate radio frequency energy and has not been

testedforcompliancewiththelimitsofcomputingdevices pursuant to subpart

Jofpart 15ofFCCrules,whicharedesignedtoprovidereasonableprotection

against radio frequency interference. Operation of this equipment in other

environments may cause interference with radio communications, in which

case the user at his own expense will be required to take whatever measures

may be required to correct this interference.

Trademarks

TI is a trademark of Texas Instruments Incorporated.

Running Title—Attribute Reference

Chapter Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Feature Highlights 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TPA112 MSOP EVM Specifications 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Quick Start 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Precautions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Quick Start List for Platform 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Quick Start List for Stand-Alone 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Details 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Precautions 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 The TPA112 MSOP Audio Amplifier Evaluation Module 3-3. . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1 TPA112 Audio Amplifier IC 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.2 Module Gain 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Using The TPA112 MSOP EVM With The Plug-N-Play Evaluation Platform 3-6. . . . . . . . .

3.3.1 Installing and Removing EVM Boards 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 Signal Routing 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.3 Power Requirements 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.5 Inputs and Outputs 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Using The TPA112 MSOP EVM Stand-Alone 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4.1 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier 3-10. . . . . . . .

3.5 TPA112 MSOP Audio Amplifier Evaluation Module Parts List 3-11. . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

1–1 The TI TPA112 MSOP Audio Amplifier Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Quick Start Platform Map 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Quick Start Module Map 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 The TI Plug-N-Play Audio Amplifier Evaluation Platform 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 TPA112 MSOP EVM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–3 TPA112 MSOP EVM Schematic Diagram 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4 TPA112 Audio Amplifier IC 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–5 Platform Signal Routing and Outputs 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6 Typical Headphone Plug 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–7 TPA112 MSOP EVM Connected as a Stereo Headphone Amplifier 3-10. . . . . . . . . . . . . . . . .

Tables

2–1 Typical TI Plug-N-Play Platform Jumper and Switch Settings for the

TPA112 MSOP EVM 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Platform Jumper and Switch Settings for the TPA112 MSOP EVM 2-3. . . . . . . . . . . . . . . . . . .

3–1 TPA112 MSOP EVM Parts List 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter provides an overview of the Texas Instruments (TI) TPA112

MSOPaudioamplifierevaluationmodule(SLOP126).Itincludes a list of EVM

features, a brief description of the module illustrated with a pictorial diagram,

and a list of EVM specifications.

Topic Page

1.1 Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Description 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TPA112 MSOP EVM Specifications 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Features

1-2 Introduction

1.1 Features

The TI TPA112 MSOP audio amplifier evaluation module and the TI

plug-n-play audio amplifier evaluation platform include the following features:

TPA112 MSOP Stereo Audio Power Amplifier Evaluation Module

Dual channel, single-ended operation

150-mW output power per channel into 8 Ωat 5 V

2.5-V to 5.5-V operation

Distortion—THD+Nisless than0.01%@1kHz andlessthan0.02%

from 20 Hz to 20 kHz into 10-kΩloads; less than 0.06% @ 1 kHz and

lessthan1%from20Hzto20kHzinto32-Ωloads;andlessthan0.1%

@ 1 kHz and less than 2% from 20 Hz to 20 kHz into 8-Ωloads

Internal thermal and short-circuit protection

Quick and Easy Configuration With the TI Plug-N-Play Audio Amplifier

Evaluation Platform

Evaluation module is designed to simply plug into the platform,

automatically making all signal, control, and power connections

Platform provides flexible power options

Jumpers on the platform select power and module control options

Switches on the platform route signals

Platformprovides quick and easyaudio input and outputconnections

Platform Power Options

Onboard 9-V battery

External 5-V –15-V (VCC) supply inputs

External regulated VDD supply input

Socket for onboard 5-V VDD voltage regulator EVM

Onboard overvoltage and reverse polarity power protection

Platform Audio Input and Output Connections

Left and right RCA phono jack inputs

Miniature stereo phone jack input

Left and right RCA phono jack outputs

Left and right compression speaker terminal outputs

Miniature stereo headphone jack output

Description

1-3

Introduction

1.2 Description

The TPA112 MSOP audio power amplifier evaluation module is a complete,

low-power stereo audio power amplifier for high-fidelity line-level output,

headphone, and small speaker applications. It consists of the TI TPA112

150-mWstereoaudiopoweramplifierICinaverysmallMSOPpackage,along

with a small number of other parts mounted on a circuit board that is

approximately one and a quarter inches square (Figure 1–1).

Figure 1–1.The TI TPA112 Audio Amplifier Evaluation Module

GND

Vo2

IN2–

IN2+

Vdd GND

IN1+

U2 C7 R9

Vo1

GND

TEXAS

INSTRUMENTS

SLOP126

TPA112 MSOP EVM

R10

R7C4

C3 JP1

IN1–

†Due to the very small size of the MSOP IC package, the standard part number TPA112 is replaced with the code TIAAD

Single in-line header pins are mounted to the underside of the module circuit

board to allow the EVM to either be plugged into the TI plug-n-play audio

amplifier evaluation platform, or to be wired directly into existing circuits and

equipment when used stand-alone.

The platform has room for a single TPA112 evaluation module. It is a

convenient vehicle for demonstrating TI’s audio power amplifier and related

evaluation modules. The EVMs simply plug into the platform, which

automatically provides power to the modules, interconnects them correctly,

andconnectsthemtoaversatilearrayofstandardaudioinputandoutputjacks

and connectors. Easy-to-use configuration controls allow the platform and

EVMs to quickly model many possible end-equipment configurations.

There is nothing to build, nothing to solder, and nothing but the speakers

included with the platform to hook up.

1.3 TPA112 MSOP EVM Specifications

Supply voltage range, VDD 2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply current, IDD 160 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output power, PO:8Ω, VDD=5 V 150 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audio input voltage, VIVDD + 0.3 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Minimum load impedance, RL8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Introduction

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