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  

March 2004 DAV−Audio Products

Data Manua

SLAS226B

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

orders and should verify that such information is current and complete. All products are sold subject to TI’s terms

and conditions of sale supplied at the time of order acknowledgment.

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

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,

in which TI products or services are used. Information published by TI regarding third-party products or services

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

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

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI 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 and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Following are URLs where you can obtain information on other Texas Instruments products and application

solutions:

Products Applications

Amplifiers amplifier.ti.com Audio www.ti.com/audio

Data Converters dataconverter.ti.com Automotive www.ti.com/automotive

DSP dsp.ti.com Broadband www.ti.com/broadband

Interface interface.ti.com Digital Control www.ti.com/digitalcontrol

Logic logic.ti.com Military www.ti.com/military

Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork

Microcontrollers microcontroller.ti.com Security www.ti.com/security

Telephony www.ti.com/telephony

Video & Imaging www.ti.com/video

Wireless www.ti.com/wireless

Mailing Address: Texas Instruments

Post Office Box 655303 Dallas, Texas 75265

iii

Contents

Section Title Page

1 Introduction 1−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Description 1−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Overview 1−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Features 1−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.1 Stereo Digital Audio Processing 1−1. . . . . . . . . . . . . . . . . . . . . .

1.3.2 Interfaces 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.3 Electrical and Physical 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Applications 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4.1 Digital Audio Controls 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4.2 Equalization 1−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4.3 Loudspeaker Active Crossovers 1−2. . . . . . . . . . . . . . . . . . . . . .

1.5 Functional Block Diagram 1−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Mixing/Input Scaling 1−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7 High-Precision, Second-Order Biquad Filter Structure 1−4. . . . . . . . . . . .

1.8 Bass and Treble Controls 1−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.9 Soft Volume and True Soft Mute 1−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.10 Reliability and Flexibility of Digital Filtering 1−7. . . . . . . . . . . . . . . . . . . . . .

1.11 Pin Assignments 1−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.12 Pin Functions 1−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.13 Ordering Information 1−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.14 Power Supply 1−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Audio Data Formats 2−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Serial Audio Interface 2−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.1 I

S Serial Format 2−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.2 Left-Justified Serial Format 2−3. . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1.3 Right-Justified Serial Format 2−4. . . . . . . . . . . . . . . . . . . . . . . . .

2.2 LRCLKOUT and SCLKOUT 2−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Serial Control Interface (I

C) 3−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 I

C Protocol 3−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Operation 3−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.1 Write Cycle Example 3−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.2 I

C Timing and Wait Cycles 3−2. . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.3 Resetting the TAS3001 I

C Interface 3−3. . . . . . . . . . . . . . . . . .

3.2.4 Power-Up Conditions 3−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2.5 I

C Serial Port Timing 3−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Digital Audio Processor 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Input Mixer Control 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Biquad Block 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2.1 Filter Coefficients 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Volume Control Functions 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.1 Soft Volume Update 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3.2 Software Soft Mute 4−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 Tone Controls 4−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.1 Treble Control 4−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.2 Bass Control 4−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4.3 Frequency Dependence of Treble and Bass Controls 4−2. . . .

5 Device Operation 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Device Initialization 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.1 Reset 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.2 Device Power On and System Reset 5−1. . . . . . . . . . . . . . . . . .

5.1.3 Fast Load 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Power Consumption 5−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Power Down and Start-Up 5−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Electrical Characteristics 6−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Absolute Maximum Ratings Over Operating Free-Air

Temperature Range 6−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Recommended Operating Conditions 6−1. . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 Power Consumption 6−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4 Static Digital Specifications 6−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Measured Audio Performance for Some Typical Examples 7−1. . . . . . . . . . .

8 Using the TAS3001 in a System 8−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1 TAS3001 Applications 8−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2 Measurement-Based Speaker Correction 8−2. . . . . . . . . . . . . . . . . . . . . . .

8.3 Sound-Based Speaker Correction 8−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.4 Loudspeaker Equalization Example 8−3. . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.5 Speaker Correction and Equalization 8−5. . . . . . . . . . . . . . . . . . . . . . . . . . .

8.6 The TAS3001 Can Implement Nearly Any Second-Order IIR Filter 8−5.

8.7 Converting Analog Filters to Digital 8−7. . . . . . . . . . . . . . . . . . . . . . . . . . . .

9 Automatic Loudspeaker Equalizer (ALE) 9−1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.1 Automatic Generation of Equalization Filters Given a Measurement 9−1

9.2 Automatic Approximation of an Equalization Curve 9−1. . . . . . . . . . . . . . .

9.3 Manual Filter Design 9−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.4 Conversion of Decimal Filter Coefficients to the TAS3001 Format 9−1. .

9.5 Editing of TAS3001 File Format 9−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.6 Examples of the Filter Types Available From ALE 2.1 9−1. . . . . . . . . . . .

10 FilterBuilder and FilterMaker 10−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A Software Interface A−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.1 Main Control Register (MCR) A−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Mechanical Information B−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of Illustrations

Figure Title Page

1−1 TAS3001 Signal Flow 1−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 Examples of High-Pass Filters 1−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−3 Examples of Equalization Filters 1−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−4 Bass and Treble Shelves 1−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−5 Multiple Filter Response 1−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−6 Combed Response of the Multiple Filters 1−5. . . . . . . . . . . . . . . . . . . . . . . . . .

1−7 Bass and Treble Filters 1−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−8 TAS3001 Pin Location Diagram 1−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−1 I

S-Compatible Serial Format 2−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−2 For Right/Left Justified, I

S, Left/Left Justified Serial Protocols 2−3. . . . . . . .

2−3 Left-Justified Serial Format 2−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−4 Right-Justified Serial Format 2−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−5 Master Mode 2−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−6 Slave Mode 2−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−1 Typical I

C Data Transfer Sequence 3−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−2 Write Cycle Example 3−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−3 Wait Cycle Example 3−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−4 I2C Serial Port Timing 3−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−1 Cascaded Biquad Filters 4−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−2 Audio Processing Architecture 4−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−1 Main Control Register (MCR) 5−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−2 Power-Down Timing 5−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−3 Start-Up Timing 5−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6−1 Typical TAS3001 Connection 6−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−1 Audio Performance Measurement System 7−1. . . . . . . . . . . . . . . . . . . . . . . . .

7−2 Audio Performance Test Filters 7−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−1 TAS3001 as a System Equalizer 8−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−2 TAS3001 as a Crossover and Equalizer 8−2. . . . . . . . . . . . . . . . . . . . . . . . . . .

8−3 Typical Small Loudspeaker Response 8−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−4 Preparation for Equalization 8−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−5 After Equalization 8−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−7 Equalization Filters 8−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8−8 Individual Filters 8−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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