AS3560-BWLT

Data Sheet AS3560 Class-G Stereo Headphone Amplifier 1 General Description 2 Key Features G-Class amplifier with integrated DCDC buck converter The AS3560 is a Class-G stereo headphone amplifier optimized for usage within portable devices. The Class-G supply rail adaptation is - 2x30mW, 0.02% THD 16 implemented by an integrated DCDC buck converter that takes its - >100dB SNR 1V rms input directly from the battery. The continuous adaption of supply Charge pump for true ground output without coupling capacitors rails is done according to the input signal swing and load conditions. This architecture implements significant power savings compared to Direct battery connection with wide supply range: 2.3V to 5.5V traditional Class-AB amplifiers. Low power consumption optimized for battery operation An I2C control interface is implemented for a 32-step volume control. - 1 mA quiescent current with both channels enabled The integrated charge pump generates a symetric negative supply - <5 A shutdown current for true ground output signal levels without the need of output Fully Differential Inputs reduce system noise coupling capacitors. - Also configurable as Single-Ended Inputs A supervisory circuit is included for overtemperature and short- circuit protection. SGND pin for ground sensing and ground feedback minimizes sensitivity to interference Differential inputs together with output ground sensing guarantees very low noise sensitivity. I2C control interface - volume control with 32 gain steps, -59 to +4dB, <-80dB mute - Channel independent enable control Current and Temperature Supervisor Package: 0.4 mm Pitch WL-CSP (1.615x1.615mm) 3 Applications Mobile Phones Portable Navigation DevicesMedia Devices Media Devices Figure 1. AS3560 Block Diagram + + ,* + + + + ()* + + & www.austriamicrosystems.com/AS3560 Revision 0.06 - preliminary 1 - 16 % AS3560 Data Sheet - Contents Contents 1 General Description .................................................................................................................................................................. 1 2 Key Features ............................................................................................................................................................................ 1 3 Applications .............................................................................................................................................................................. 1 4 Pin Assignments ....................................................................................................................................................................... 3 4.1 Pin Descriptions ................................................................................................................................................................................... 3 5 Absolute Maximum Ratings ...................................................................................................................................................... 4 6 Electrical Characteristics .......................................................................................................................................................... 5 7 Detailed Operating Characteristics ........................................................................................................................................... 7 8 Detailed Description ................................................................................................................................................................. 8 8.1 I2C Control Interface ............................................................................................................................................................................ 8 9 Register Definition .................................................................................................................................................................... 9 9.1 Register Overview ................................................................................................................................................................................9 9.2 Detailed Register Descriptions ............................................................................................................................................................. 9 10 Application Information ..........................................................................................................................................................11 10.1 GND Connections ............................................................................................................................................................................ 11 10.2 External Elements ............................................................................................................................................................................ 11 10.3 Software Shutdown .......................................................................................................................................................................... 11 11 Package Drawings and Markings ......................................................................................................................................... 12 12 Ordering Information ............................................................................................................................................................. 14 www.austriamicrosystems.com/AS3560 Revision 0.06 - preliminary 2 - 16