ACS32201XTAGZBX

DATASHEET PORTBLE CONSUMER DEVICE ACS32201 LOWER-POWER, HIGH-FIDELITY, CLASS-D AMPLIFIER The ACS32201 is a low-power, high-fidelity Class-D ampli- FEATURES fier targeted at portable applications such as tablet com- TM Filterless Stereo DDX Class D puters, personal navigation devices, portable projectors Speaker Driver and speaker docks. Built-in audio processing and a 1.75W/channel (8) or TM DDX Class-D digital speaker amplifier provide high fidel- 3W/channel (4 ) ity audio for portable systems with enriched audio pres- TM Tri-state DDX Class D achieves low EMI and high ence. efficiency >80% efficiency at 1W Spread spectrum support for reduced EMI output power TARGET APPLICATIONS mode Anti-Pop circuitry Tablet Computers Built in audio controls and processing Portable Navigation Devices 3D stereo enhancement Personal Media Players Dual (cascaded) stereo 6-band parametric equalizers Programmable Compressor/Limiter/Expander Portable Projectors Psychoacoustic Bass and Treble enhancement Speaker Docks processing I2S data interface Low power with built in power management Very low standby and no-signal power consumption 1.8V digital / 1.7V analog supply for low power 2 2-wire (I C compatible) control interface Package Options 36-pin single row 5x5 mm HLA package 68-pin dual row 6x6 mm TLA package TM DDX and the DDX logo are trademarks of Apogee Technology. TSI CONFIDENTIAL 1 V 1.6 10/14 2014 TEMPO SEMICONDCUTOR, INC. ACS32201ACS32201 LOWER-POWER, HIGH-FIDELITY, CLASS-D AMPLIFIER TABLE OF CONTENTS 1. OVERVIEW ................................................................................................................................ 7 1.1. Block Diagrams ..................................................................................................................................7 1.2. Audio Outputs ....................................................................................................................................7 2. POWER MANAGEMENT .......................................................................................................... 8 2.1. Control Registers ...............................................................................................................................8 2.2. Stopping the Master Clock .................................................................................................................8 3. OUTPUT AUDIO PROCESSING ............................................................................................... 9 3.1. DC Removal ......................................................................................................................................9 3.2. Volume Control ................................................................................................................................10 3.3. Digital DAC Volume Control .............................................................................................................11 3.4. Parametric Equalizer .......................................................................................................................11 3.4.1. Prescaler & Equalizer Filter ...............................................................................................11 3.4.2. EQ Registers ......................................................................................................................12 3.4.3. Equalizer, Bass, Treble Coefficient & Equalizer Prescaler RAM .......................................14 3.5. Gain and Dynamic Range Control ...................................................................................................17 3.6. Limiter ..............................................................................................................................................17 3.7. Compressor .....................................................................................................................................18 3.7.1. Configuration ......................................................................................................................19 3.7.2. Controlling parameters .......................................................................................................19 3.7.3. Overview ............................................................................................................................20 3.7.4. Limiter/Compressor Registers ............................................................................................22 3.7.5. Expander Registers ...........................................................................................................24 3.8. Output Effects ..................................................................................................................................25 3.9. Stereo Depth (3-D) Enhancement ...................................................................................................25 3.10. Psychoacoustic Bass Enhancement ..............................................................................................26 3.11. Treble Enhancement .....................................................................................................................26 3.12. Mute and De-Emphasis .................................................................................................................26 3.13. Mono Operation and Phase Inversion ...........................................................................................26 3.13.1. DAC Control Register .....................................................................................................26 3.14. Analog Outputs ..............................................................................................................................27 3.14.1. Speaker Outputs ..............................................................................................................27 3.14.2. Class D Audio Processing ...............................................................................................27 3.15. Other Output Capabilities ..............................................................................................................33 3.15.1. Audio Output Control .......................................................................................................33 3.15.2. Speaker Enable ...............................................................................................................33 3.15.3. Speaker Operation ...........................................................................................................34 3.16. Thermal Shutdown .........................................................................................................................34 3.16.1. Algorithm description: ......................................................................................................34 3.16.2. Thermal Trip Points........................................................................................................35 3.16.3. Instant Cut Mode ..............................................................................................................35 3.16.4. Short Circuit Protection ....................................................................................................35 3.16.5. Thermal Shutdown Registers ...........................................................................................36 4. DIGITAL AUDIO AND CONTROL INTERFACES ................................................................... 38 4.1. Data Interface ..................................................................................................................................38 4.2. Master and Slave Mode Operation ..................................................................................................38 4.3. Audio Data Formats .........................................................................................................................39 4.4. Left Justified Audio Interface ...........................................................................................................39 4.5. Right Justified Audio Interface (assuming n-bit word length) ...........................................................39 4.6. I2S Format Audio Interface ..............................................................................................................40 4.7. Data Interface Registers ..................................................................................................................40 4.7.1. Audio Data Format Control Register ..................................................................................40 4.7.2. Audio Interface Output Tri-state .........................................................................................41 4.7.3. Audio Interface Control 3 Register .....................................................................................41 4.8. Bit Clock Mode .................................................................................................................................41 4.9. Control Interface ..............................................................................................................................42 4.9.1. Register Write Cycle ..........................................................................................................42 4.9.2. Multiple Write Cycle ...........................................................................................................43 TSI CONFIDENTIAL 2 V 1.6 10/14 2014 TEMPO SEMICONDCUTOR, INC. ACS32201