Digital Input 2 W Class-D Audio Power Amplifier Data Sheet SSM2519 FEATURES APPLICATIONS Filterless digital input Class-D amplifier Mobile phones 2 Standalone operation or I C control Portable media players 2 Serial digital audio interface supports common formats: I S, Laptop PCs left justified, right justified, TDM1-16, and PCM Wireless speakers 2.31 W into 4 and 1.35 W into 8 at 5 V supply with Portable gaming 1% THD + N Navigation systems Available in 12-ball 1.4 mm 1.7 mm 0.4 mm pitch WLCSP Efficiency 90% at full scale into 8 FUNCTIONAL BLOCK DIAGRAM 9 mW loaded idle power at 1.8 V/3.6 V VDD GND PVDD SNR = 98 dB, A-weighted PSRR = 80 dB at 217 Hz, dither input POWER-ON Supports wide range of sample rates: 8.0 kHz to 48.0 kHz RESET Autosample rate and MCLK rate detection No BCLK required for operation LRCLK 2.5 V to 5.5 V PV speaker operating supply voltage DD OUT+ 2 I S DAC BCLK 1.5 V to 3.6 V V operating voltage DD Pop and click suppression SDATA OUT Short-circuit and thermal protection with autorecovery Smart power-down when no input signal detected CLOCKING POWER 2 I C SD Power-on reset CONTROL SSM2519 Low EMI emissions MCLK GAIN/SDA LR FORMAT/SCL Figure 1. GENERAL DESCRIPTION The SSM2519 is a digital input, Class-D power amplifier that com- Input is provided via a serial audio interface, programmable to 2 bines a digital-to-analog converter (DAC) and a sigma-delta accept all common audio formats including I S, left justified (LJ), (-) Class-D modulator. This unique architecture enables right justified (RJ), TDM, and PCM. The SSM2519 is designed to 2 extremely low, real-world power consumption from digital operate with or without a control interface such as I C, which is audio sources with excellent audio performance. The SSM2519 typically required for this type of device. Several control pins 2 is ideal for power sensitive applications, such as mobile phones offer selection of operation when I C control is not used. The and portable media players, where system noise can corrupt SSM2519 can accept a variety of input MCLK frequencies and small analog signals such as those sent to an analog input audio can use BCLK as the clock source in some configurations. Both amplifier. the input sample rate and MCLK rates are automatically detected. Using the SSM2519, audio data can be transmitted to the amplifier over a standard digital audio serial interface, thereby significantly The architecture of the SSM2519 provides a solution that offers reducing the effect of noise sources such as GSM interference or lower power and higher performance than existing DAC plus other digital signals on the transmitted audio. The closed-loop Class-D solutions. Its digital interface also offers a better system digital input design retains the benefits of a completely digital solution for other products whose sole audio source is digital, amplifier, yet enables very good PSRR and audio performance. such as wireless speakers, laptop PCs, portable digital televisions, The three-level, - Class-D modulator is designed to provide and navigation systems. the least amount of EMI interference, the lowest quiescent The SSM2519 is specified over the industrial temperature range power dissipation, and the highest audio efficiency without of 40C to +85 C. It has built-in thermal shutdown and output sacrificing audio quality. short-circuit protection. It is available in a 12-ball, 1.4 mm 1.7 mm wafer level chip scale package (WLCSP). Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. DIGITAL FILTERING VOLUME/GAIN - CLASS-D MODULATOR FULL BRIDGE POWER STAGE 10750-001SSM2519 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Volume Control .......................................................................... 14 Applications ....................................................................................... 1 Analog Gain ................................................................................ 14 Functional Block Diagram .............................................................. 1 Fault Detection and Recovery .................................................. 14 General Description ......................................................................... 1 Digital Audio Formats ................................................................... 15 Revision History ............................................................................... 2 Stereo Mode ................................................................................ 15 Specif icat ions ..................................................................................... 3 TDM, 50% Duty Cycle Mode ................................................... 15 Performance Specifications ......................................................... 3 TDM, Pulse Mode ...................................................................... 15 Power Supply Requirements ....................................................... 4 PCM, Multichannel Mode ........................................................ 16 Digital Input/Output .................................................................... 4 PCM, Mono Mode ..................................................................... 16 2 Digital Timing ............................................................................... 4 I C Configuration Interface .......................................................... 17 Absolute Maximum Ratings ............................................................ 6 Overview ..................................................................................... 17 Thermal Resistance ...................................................................... 6 Register Summary .......................................................................... 19 ESD Caution .................................................................................. 6 Register Details ............................................................................... 20 Pin Configuration and Function Descriptions ............................. 7 Software Reset and Master Software Power-Down Control Register ........................................................................................ 20 Typical Performance Characteristics ............................................. 8 Edge Speed, Power, and Clocking Control Register .............. 21 Theory of Operation ...................................................................... 12 Serial Audio Interface and Sample Rate Control Register .... 22 O ver vie w ...................................................................................... 12 2 Serial Audio Interface Control Register .................................. 23 Standalone and I C Operational Mode ................................... 12 Channel Mapping Control Register ......................................... 24 Master and Bit Clock .................................................................. 12 Volume Control Register ........................................................... 25 Digital Input Serial Audio Interface ......................................... 13 Gain and Mute Control Register .............................................. 26 Channel Mapping ....................................................................... 13 Fault Control Register ................................................................ 27 Power Supplies ............................................................................ 13 Outline Dimensions ....................................................................... 28 Power Control ............................................................................. 14 Ordering Guide .......................................................................... 28 Power-On Reset/Voltage Supervisor ....................................... 14 Low Power Modes ...................................................................... 14 REVISION HISTORY 7/12Revision 0: Initial Version Rev. 0 Page 2 of 28