EVALUATION KIT AVAILABLE MAX98358 PDM Input Class D Audio Power Amplifier General Description Features The MAX98358 is a digital pulse-density modulated Single-Supply Operation (2.5V to 5.5V) (PDM) input Class D power amplifier that provides Class 3.2W Output Power into 4 at 5V AB audio performance with Class D efficiency. This IC 1.8mA Quiescent Current (V = 3.7V) DD offers five selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) set by a single gain-select input (GAIN). The IC 92% Efficiency (R = 8, P = 1.5W) L OUT can be configured to produce a left channel, right channel, 29V Output Noise (A = 6dB) RMS V or (left/2 + right/2) output from the stereo input data. Low 0.015% THD+N at 1kHz The MAX98358 takes a stereo pulse density modulated Supported PDM CLK Rates of 1.84MHz4.32MHz (SPDM) input signal directly into the DAC. Data on the and 5.28MHz8.64MHz rising edge of PDM CLK is considered left-channel data Supports Left, Right, or Left/2 + Right/2 Outputs while data on the falling PDM CLK edge is right channel. A mono sum feature is also implemented with SPDM data Sophisticated Edge Rate Control Enables Filterless input by summing the data from both rising and falling Class D Outputs clock edges. 77dB PSRR at 217Hz Active emissions-limiting, edge-rate limiting, and over- Low RF Susceptibility Rejects TDMA shoot control circuitry greatly reduce EMI. A filterless Noise from GSM Radios spread-spectrum modulation scheme eliminates the need Extensive Click-and-Pop Reduction Circuitry for output filtering found in traditional Class D devices and reduces the component count of the solution. Robust Short-Circuit and Thermal Protection The IC is available in 9-pin WLP (1.345mm x 1.435mm Available in Space-Saving Packages: x 0.64mm) and 16-pin TQFN (3mm x 3mm x 0.75mm) 1.345mm x 1.435mm WLP (0.4mm Pitch) packages and is specified over the -40C to +85C tem- 3mm x 3mm TQFN perature range. Applications Simplified Block Diagram Notebook and Netbook Computers Cellular Phones Tablets Portable Media Players SHUTDOWN AND GAIN MAX98358 CHANNEL CONTROL SELECT CLASS D DIGITAL PDM AUDIO DAC OUTPUT Ordering Information and Functional Diagram appears at INPUT STAGE INTERFACE end of data sheet. For related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX98358.related. 19-6786 Rev 3 1/15MAX98358 PDM Input Class D Audio Power Amplifier TABLE OF CONTENTS General Description ............................................................................ 1 Applications .................................................................................. 1 Features ..................................................................................... 1 Simplified Block Diagram........................................................................ 1 Absolute Maximum Ratings ...................................................................... 4 Package Thermal Characteristics ................................................................. 4 Electrical Characteristics ........................................................................ 4 Typical Operating Characteristics ................................................................. 7 General 7 Speaker Amplifier 8 Bump/Pin Configurations ....................................................................... 15 Bump/Pin Description.......................................................................... 15 Detailed Description........................................................................... 16 Digital Audio Interface 16 Supported PDM CLK Rates 16 PDM CLK Jitter Tolerance . 16 PDM Timing Characteristics 17 Standby Mode . 17 SD MODE Pin and Shutdown Operation . 17 Class D Speaker Amplifier 18 Ultra-Low EMI Filterless Output Stage 18 Speaker Current Limit . 18 Gain Selection . 18 Click-and-Pop Suppression . 18 Filterless Class D Operation . 22 Power-Supply Input 22 Layout and Grounding 22 WLP Applications Information 22 Functional Diagram ........................................................................... 23 Ordering Information .......................................................................... 23 Package Information .......................................................................... 24 Revision History .............................................................................. 27 Maxim Integrated 2 www.maximintegrated.com