TAS5010−5112F2EVM Evaluation Module for the TAS5010 Digital Audio PWM Processor and the TAS5112ADFD Digital Audio PWM Power Output Stage User’s Guide June 2004 DAV Digital Audio/Speaker SLEU056
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.
EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 V to 29.5 V for the output stage and 15 V to 20 V for the system supply. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Information About Cautions and Warnings Preface Read This First About This Manual This manual describes the operation of the TAS5010−5112F2EVM evaluation module from Texas Instruments. How to Use This Manual This document contains the following chapters: - Chapter 1 – Overview - Chapter 2 – Detailed Description of the EVM Board - Chapter 3 – EVM Board Operation - Chapter 4 – Hints for Measurements of Performance Information About Cautions and Warnings This book may contain cautions and warnings.
Trademarks The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully. Related Documentation From Texas Instruments The following table contains a list of data manuals that have detailed descriptions of the integrated circuits used in the design of the TAS5010−5112F2EVM. The data manuals can be obtained at the URL http://www.ti.com.
Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 TAS5010−5112F2EVM Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Detailed Description of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Figures 1−1 2−1 2−2 2−3 2−4 2−5 2−6 3−1 3−2 Simplified TAS5010−5112F2EVM Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Board Outline With Connectors, Switches, Jumpers, and Indicators . . . . . . . . . . . . . . . . . . Physical Structure for the TAS5010−5112F2EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Jumper Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction The TAS5010−5112F2EVM PurePath Digitalt customer evaluation module demonstrates two integrated circuits, the TAS5010 and TAS5112ADFD from Texas Instruments. The TAS5010 is a high performance 24-bit stereo digital modulator based on Equibitt technology. This IC converts input PCM serial digital audio data to a pulse width modulated (PWM) audio data stream. The TAS5010 PWM modulator accepts I2S data with a sample rate up to 192 kHz.
TAS5010−5112F2EVM Features 1.
TAS5010−5112F2EVM Features The TAS3002 IC from Texas Instruments is used as digital audio processor (DAP). All features in the DAP can be controlled through the I2S interface. Adjustment of the sound level can be executed through the I2C bus and with two push buttons on the EVM board. During power up, the TAS3002 settings and coefficients are loaded from an external serial EEPROM. The TAS3002 coefficients control all features in the DAP. Customized start up settings can be downloaded to the EEPROM.
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Chapter 2 Detailed Description of the EVM This chapter describes the TAS5010−5112F2EVM board in regards to board layout, jumpers, switches, buttons, and connectors. Topic Page 2.1 Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Description of Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.3 Default Jumper Positioins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Overview 2.1 Board Overview Figure 2−1.
Description of Jumper Settings 2.2 Description of Jumper Settings There are three jumpers on the EVM board (J400 is an I2S interface) 2.2.1 Double-Speed Control (JMP120) JMP120 is used to set the double-speed pin at TAS5010 (DBSPD, pin 39). The TAS5010 is operating in single-speed mode if the DBSPD pin is asserted low and in double-speed if it is asserted high. Single-speed is required for sampling rate at 32 kHz, 44.1 kHz, 48 kHz, and double-speed for 88-kHz and 96-kHz sampling rate.
Default Jumper Positioins 2.3 Default Jumper Positioins Default jumper positions are marked with a grey rectangle in Figure 2−3. Figure 2−3. Default Jumper Positions J600 J100 J540 + J541 − J580 + J581 − JMP130 JMP120 J101 J170 J160 JMP360 J300 2.4 Description of Connectors 2.4.1 S/PDIF Digital Audio Coaxial/RCA Input (J100) The RCA connector can be connected to a digital S/PDIF source through a coaxial cable with 75-Ω characteristic impedance (e.g., RG59 cable).
Description of Connectors Table 2−1. Description of J160 and J170 Pin No. Description Analog Input Connector (J160) 1 Left Channel Input 2 Ground 3 Right Channel Input Analog Output Connector (J170) 2.4.4 1 Left Channel output 2 Ground 3 Right Channel Output PC and I2C Interface (J300) The PC interface using the attached special cable to parallel/printer port on the PC.
Description of Connectors 2.4.5 Loudspeaker Connectors (J540, J541, J580, and J581) All speaker connectors accept standard 4 mm plugs. Use of high quality plugs and speaker cable are recommended. Table 2−3.
Description of Switches and Buttons 2.5 Description of Switches and Buttons 2.5.1 S/PDIF Input Selector Switch (S100) S100 switches between optical and coaxial S/PDIF input. When the lever is pressed in the direction of J101, the optical S/PDIF input is selected. When the lever is pressed in the direction of J100, the coaxial S/PDIF input is selected. 2.5.2 Bypass Digital Audio Processor Switch (S320) When the lever is pressed in the direction of S341, the DAP is bypassed.
Description of Indicators 2.6 Description of Indicators 2.6.1 Power LED (LED223) The green LED indicates that the TAS5010−5112F2EVM board is powered on. 2.6.2 control circuitry at the No S/PDIF Input LED (LED222) The yellow LED indicates that the S/PDIF input signal is missing or it does not contain valid audio data. Reasons to have a No S/PDIF warning: - The lever at the S/PDIF input selector switch (S100) is placed in the wrong position. - The S/PDIF signal is missing.
Chapter 3 EVM Board Operation This chapter describes the TAS5010−5112F2EVM board operation. Topic Page 3.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 Setup the TAS5010-5112F2EVM With the S/PDIF Input . . . . . . . . . . . . 3-3 3.3 Setup the TAS5010-5112F2EVM With the Analog Line Input . . . . . . . 3-4 3.4 Interfacing the Analog Line Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.
Power Supply 3.1 Power Supply The TAS5010−5112F2EVM can be powered from one or two external power supplies. High-end audio performance requires a stabilized power supply with low ripple voltage and low output impedance. Note: The length of the power supply cable must be minimized. Increasing the length of the PSU cable is equal to increasing the distortion for the amplifier at high output levels and low frequencies. 3.1.
Setup the TAS5010−5112F2EVM With the S/PDIF Input 3.2 Setup the TAS5010−5112F2EVM With the S/PDIF Input Connect the EVM board as shown in Figure 3−2. Select between coaxial or optical input signal at the input selector switch (S100). Press the lever at S320 in the direction of U360 if the TAS3002 DAP is wanted in the signal path (recommended during normal listening tests). There is no attenuation if DAP is bypassed.
Setup the TAS5010−5112F2EVM With the Analog Line Input 3.2.1 Start-up Sequence 1) Turn on the power supply/supplies. Follow the power-up and power-down sequence described in the Power Supply section. Observe that the green Power ON LED and the yellow No S/PDIF LED are lit. 2) Run the DCT software from the PC desktop if the DAP is activated (S320) and the attached cable is connected from J300 to the PC. 3) Turn on the CD/DVD player and play the test CD. Observe that the yellow No S/PDIF now is OFF.
Chapter 4 Hints for Measurement of Performance Read the Digital Audio Measurements application note (SLAA114) for an introduction to measurements on true digital audio amplifiers. You are welcome to use the audio precision test files available on the PurePath Digital™ amplifier CD-ROM. Note that an AES17 filter is required to reach the shown measurements.
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