MAX97000 19-5004 Rev 1 6/10 Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier General Description Features The MAX97000 audio subsystem combines a mono S 1.6V to 2.0V Headphone Supply Voltage speaker amplifier with a stereo headphone amplifier and S 2.7V to 5.5V Speaker Supply Voltage an analog DPST switch. The headphone and speaker S Internal LDO Allows Single-Supply Operation amplifiers have independent volume control and on/off S 725mW Speaker Output (V = 3.7V, Z = 8I control. The four inputs are configurable as two differen- PVDD SPK tial inputs or four single-ended inputs. + 68H) The entire subsystem is designed for maximum efficiency. S 40mW/Channel Headphone Output (R = 16I) HP The high-efficiency 725mW Class D speaker amplifier S Low-Emission Class D Amplifier operates directly from the battery and consumes no more S Efficient Class H Headphone Amplifier than 1FA in shutdown mode. The Class H headphone S Ground-Referenced Headphone Outputs amplifier utilizes a dual-mode charge pump to maximize efficiency while outputting a ground-referenced signal S Two Stereo Single-Ended/Mono Differential Inputs that does not require output coupling capacitors. S Integrated Distortion Limiter (Speaker Outputs) The speaker amplifier incorporates a distortion limiter to S Integrated DPST Analog Switch automatically reduce the volume level when excessive S No Clicks and Pops clipping occurs. This allows high gain for low-level sig- nals without compromising the quality of large signals. S TDMA Noise Free 2 All control is performed using the 2-wire, I C interface. S 2mm x 2mm, 25-Bump 0.4mm Pitch WLP Package The MAX97000 operates in the extended -40NC to +85NC temperature range, and is available in the 2mm x 2mm, Ordering Information 25-bump WLP package (0.4mm pitch). PART TEMP RANGE PIN-PACKAGE Applications MAX97000EWA+ -40NC to +85NC 25 WLP Cell Phones +Denotes a lead(Pb)-free/RoHS-compliant package. Portable Multimedia Players Simplified Block Diagram BATTERY 2 2.7V TO 5.5V I C 1.8V POWER SUPPLY CONTROL MAX97000 STEREO/ MONO CLASS D INPUT LIMITER VOLUME AMPLIFIER CLASS H VOLUME AMPLIFIER STEREO/ MONO INPUT CHARGE PUMP SWITCH Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEAudio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier TABLE OF CONTENTS General Description 1 Applications 1 Features . 1 Simplified Block Diagram 1 Ordering Information . 1 Table of Contents 2 Functional Diagram/Typical Application Circuit . 4 Absolute Maximum Ratings 5 Electrical Characteristics 5 Digital I/O Characteristics 9 2 I C Timing Characteristics . 9 Typical Operating Characteristics 10 Pin Configuration . 17 Pin Description . 17 Detailed Description . 18 Signal Path 18 Mixers 19 Class D Speaker Amplifier 19 Ultra-Low EMI Filterless Output Stage .20 Distortion Limiter . 21 Analog Switch 21 Headphone Amplifier 21 DirectDrive 21 Charge Pump 22 Class H Operation 22 Low-Power Mode .22 2 I C Slave Address .22 2 I C Registers .23 2 MAX97000