AS3515 v14 austria micro systems product brief www.austriamicrosystems.com revision 3.04 1 - 3 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, 16 headset, 4 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. 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 @10k audio mixer ? 10 channel input/output mixer with agc ? mixes line inputs and microphones with dac ? left and right channels independent high efficiency headphone amplifier ? volume control via serial interface ? 32 steps @1.5db and mute ? 2x40mw @16 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 @8 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 3 application portable digital audio player and recorder pda, smartphone product brie f AS3515 stereo audio codec with system power management
AS3515 v14 austria micro systems product brief www.austriamicrosystems.com revision 3.04 2 - 3 4 block diagram figure 1 AS3515 block diagram
AS3515 v14 austria micro systems product brief www.austriamicrosystems.com revision 3.04 3 - 3 5 copyright copyright ? 1997-2006, austriam icrosystems ag, schloss premstaetten, 8141 unte rpremstaetten, austria-europe. trademarks registered ?. all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used with out 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 o f sale. austriamicrosystems ag makes no warranty, ex press, statutory, implied, or by descrip tion regarding the information set forth he rein or regarding the freedom of the described device s from patent infringement . austriamicrosystems ag rese rves the right to change specifications and prices at any time and without notice. therefore, prior to designing this pr oduct into a system, it is neces sary to check with austriamicrosystems ag for current information. this product is intended for use in normal commercial applications. applic ations requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, m edical life- support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems ag f or each application. the information furnished here by austriamicrosystems ag is belie ved to be correct and accurate. however, austriamicrosystems a g shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property dam age, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in conne ction 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 premst?tten, 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 austria micro systems ? a leap ahead in analog
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