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| AS3517 Product Brief austriamicrosystems AS3517 General Description The AS3517 is a low power stereo audio codec and is designed for Portable Digital Audio Applications. It allows playback and recording in CD quality. It has a variety of audio inputs and outputs to directly connect electret microphones, 16 headset and auxiliary signal sources via a 10-channel mixer. It only consumes 20mW in playback mode. Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player with flash or harddisk memory are supplied by the AS3517. The power management block generates 11 different supply voltages out of the battery supply. CPU, NAND flash, SRAM, memory cards, harddisk, LCD backlight, USB-HOST and USB-OTG can be powered. The different supply voltages are programmable via the serial control interface. AS3517 also contains a charger. The supply voltage can range from 3.0V to 5.5V. The AS3517 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 in slave mode. Further the AS3517 has an independent 32kHz real time clock (RTC) on chip which allows a complete power down of the system CPU. Product Brief Stereo Audio Codec with advanced System Power Management - 32 steps @1.5dB and MUTE - 2x60mW @16 driver capability - headphone and over-current detection - phantom ground eliminates large capacitors Audio Mixer - 10 channel input/output mixer - mixes line inputs and microphones with DAC - left and right channels independent Power Management - step down for harddisk (0.65V-3.4V, 500mA) - step down for CPUcore (0.65V-3.4V, 250mA) - step down for peripheral (0.65V-3.4V, 250mA) - charge pump for USB OTG (5V, 10mA) - step up for USB HOST/OTG (5V, 500mA) - step up for backlight (15V, 40mA), dimming - LDO for digital supply (2.9V, 200mA) - LDO for analogue supply (2.9V, 200mA) - LDO for peripherals (1.2V-3.5V, 200mA) - LDO for peripherals (1.2V-3.5V, 200mA) - LDO for RTC (1.0V-2.5V, 2mA) - power supply supervision - hibernation modes - 10sec and 5sec emergency shut-down Battery Charger - automatic trickle charge (50mA) - prog. constant current charging (50-400mA) - prog. constant voltage charging (3.9V-4.25V) Real Time Clock - ultra low power 32kHz oscillator - 32bit RTC sec counter, 96 days auto wake-up - selectable alarm (seconds or minutes) - 128bit free SRAM for random settings - 32kHz clock output to peripheral Auxiliary Oscillator (only for master clock mode) - low power 12-24MHz oscillator - master clock output to peripheral (e.g.CPU) General Purpose ADC - 10bit resolution - 21 inputs analogue multiplexer Interfaces - IS digital audio interface and SPDIF - 2 wire serial control interface - reset pin, watchdog via serial interface and pin - power good pin, PWM output - 128bit unique ID (OTP) - 30 different interrupts Package BGA81 [9.0x9.0x1.15mm] 0.8mm pitch Key Features Multi-bit Sigma Delta Converters - DAC: 18bit with 94dB SNR (`A' weighted) - ADC: 20bit with 94dB SNR (`A' weighted) - Sampling Frequency: 8-48kHz 2 Microphone Inputs - 3 gain pre-setting (28dB/34dB/40dB) and OFF - 32 gain steps @1.5dB and MUTE - supply for electret microphones - microphone detection - voice activation - 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 2 Line Outputs - volume control via serial interface - 32 steps @1.5dB and MUTE - 1Vp @10k High Efficiency Headphone Amplifier - volume control via serial interface www.austriamicrosystems.com Application Portable Digital Audio Player and Recorder PDA, Smartphone Revision 1.0 1-3 AS3517 Product Brief austriamicrosystems Block Diagram www.austriamicrosystems.com Revision 1.0 2-3 AS3517 Product Brief austriamicrosystems Copyright Copyright (c) 2002-2005, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, AustriaEurope. Trademarks Registered (R). 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. 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 life-support 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. Contact Information Headquarters: austriamicrosystems AG Business Unit Communications A 8141 Schloss Premstatten, 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 www.austriamicrosystems.com Revision 1.0 - a leap ahead 3-3 |
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