AS3515

AS3515 V14 Product Brief a ustria micro systems Product Brief AS3515 Stereo Audio Codec with System Power Management 1 General Description The AS3515 is a low power stereo audio codec and is designed for Portable Digital Audio Applications. It allows playback in CD quality and recording in FM-stereo quality. It has a variety of audio inputs and outputs to directly connect electret microphones, 16Ω headset, 4Ω speaker and auxiliary signal sources via a 10-channel mixer. It only consumes 22mW in playback mode. Further the device offers advanced power management functions. All necessary ICs and peripherals in a flash based Digital Audio Player are supplied by the AS3515. The power management block generates 9 different supply voltages out of the battery supply. CPU, NAND flash, SRAM, memory cards, LCD back-light, USB RX/TX can be powered. The different supply voltages are programmable via the serial control interface. It also contains a charger and is designed for battery supplies from 1V to 5V. The AS3515 has an on-chip, phase locked loop (PLL) controlled, clock generator. It generates 44.1kHz, 48kHz and other sample rates defined in MP3, AAC, WMA, OGG VORBIS etc. No additional external crystal or PLL is needed. Further the AS3515 has an independent 32kHz real time clock (RTC) on chip which allows a complete power down of the system CPU. High Efficiency Headphone Amplifier – volume control via serial interface – 32 steps @1.5dB and MUTE – 2x40mW @16Ω driver capability – headphone and over-current detection – phantom ground eliminates large capacitors High Power Speaker Amplifier – volume control via serial interface – 32 steps @1.5dB and MUTE – 2x500mW @8Ω driver capability – over-current detection Power Management – step up for system supply (3.0V – 3.6V) – charge pump for CPU core (0.85V – 1.8V, 200mA) – step up for backlight (15V, 38.5mA) – LDO for digital supply (2.9V, 200mA) – LDO for analogue supply (2.9V, 200mA) – LDO for peripherals (1.7V-3.3V, 200mA) – LDO for peripherals (3.1V-3.3V, 200mA) – LDO for RTC (1.0V-2.5V, 2mA) – LDO for USB 1.1 transceiver (3.26V, 10mA) – battery supervision – 10sec emergency shut-down Battery Charger – automatic trickle charge (50mA) – prog. constant current charging (100-400mA) – prog. constant voltage charging (3.9V-4.25V) Real Time Clock – ultra low power 32kHz oscillator – 32bit RTC sec counter – selectable alarm (seconds or minutes) General Purpose ADC – 10bit resolution – 16 inputs analogue multiplexer Interfaces – I²S digital audio interface – 2 wire serial control interface – watchdog via serial interface – power good pin – 128bit unique ID (OTP) – 17 different interrupts Package CTBGA64 [7.0x7.0x1.1mm] 0.8mm pitch 2 Key Features Multi-bit Sigma Delta Converters – DAC: 18bit with 94dB SNR (‘A’ weighted) , 48kHz – ADC: 14bit with 82dB SNR (‘A’ weighted), 16kHz 2 Microphone Inputs – 3 gain pre-setting (28dB/34dB/40dB) and AGC – 32 gain steps @1.5dB and MUTE – supply for electret microphone – microphone detection – remote control by switch 2 Line Inputs – volume control via serial interface – 32 steps @1.5dB and MUTE – stereo or 2x mono or mono differential Line Outputs – volume control via serial interface – 32 steps @1.5dB and MUTE – 1Vp @10kΩ Audio Mixer – 10 channel input/output mixer with AGC – mixes line inputs and microphones with DAC – left and right channels independent 3 Application Portable Digital Audio Player and Recorder PDA, Smartphone www.austriamicrosystems.com Revision 3.04 1-3 AS3515 V14 Product Brief a ustria micro systems 4 Block Diagram Figure 1 AS3515 Block Diagram www.austriamicrosystems.com Revision 3.04 2-3 AS3515 V14 Product Brief a ustria micro systems 5 Copyright Copyright © 1997-2006, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks of their respective companies. 6 Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent identification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. 7 Contact Information Headquarters: austriamicrosystems AG Business Unit Communications A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 5692 info@austriamicrosystems.com For Sales Offices, Distributors and Representatives, please visit: www.austriamicrosystems.com austriamicrosystems – a leap ahead in analog www.austriamicrosystems.com Revision 3.04 3-3