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AS3517 Datasheet Preview

AS3517 Datasheet

Stereo Audio Codec

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AS3517 pdf
AS3517 V17
Data Sheet, Confidential
AS3517
Data Sheet, Confidential
Stereo Audio Codec with enhanced System Power Management
1 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,
16Ω/32Ω headsets 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 different regulated supply voltages are
programmable via the serial control interface. The power
management block generates 11 different supply voltages out
of a single battery supply. CPU, NAND flash, SRAM, memory
cards, harddisk, LCD, LCD backlight, USB-HOST and USB-
OTG can be powered. AS3517 also contains a charger. The
single supply voltage may vary 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.
2 Key Features
Multi-bit Sigma Delta Converters
– DAC: 94dB SNR (‘A’ weighted) @ 2.9V
– ADC: 90dB SNR (‘A’ weighted) @ 2.9V
– Sampling Frequency: 8-48kHz
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
Audio Mixer
– 10 channel input/output mixer with AGC
– mixes line inputs and microphones with DAC
– left and right channels independent
2 Line Outputs
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– 1Vp @10kΩ
– Stereo 2*5mW to 16ohm
– Differential 10mW to 32ohm (earpiece)
High Efficiency Headphone Amplifier
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– 2x60mW @16Ω driver capability
– headphone and over-current detection
– phantom ground eliminates large capacitors
Power Management
– step down for CPU core (0.65V-3.4V, 250mA)
– step down for peripheral (0.65V-3.4V, 250mA)
– step down for harddisk (0.65V-3.4V, 500mA)
– step up for backlight (15V (25V), 38mA),
– LDO for digital supply (2.9V, 200mA)
– LDO for analog 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
– 5sec and 10sec emergency shut-down
Battery Charger
– automatic trickle charge (50mA)
– prog. constant current charging (50-460mA)
– 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 input/output (e.g. from/to CPU)
General Purpose ADC
– 10bit resolution
– 21 inputs analog multiplexer
Interfaces
– I²S digital audio interface and SPDIF
– 2 wire serial control interface
– reset pin, watchdog, power good pin
– PWM output
– 128bit unique ID (OTP)
– 30 different interrupts
Package CTBGA81 [9.0x9.0x1.15mm] 0.8mm pitch
3 Application
Portable Digital Audio Player and Recorder
PDA, Smartphone
© 2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Revision 1v3
1 - 93



AMSCO
AMSCO

AS3517 Datasheet Preview

AS3517 Datasheet

Stereo Audio Codec

No Preview Available !

AS3517 pdf
AS3517 V17
Data Sheet, Confidential
4 Functional Overview
USB
Host / OTG
Keys
LCD
AS3517
PMU = Voltage Supply + Supply Supervision + Power-up + Hibernation
SPDIF Out
Flash
SD-
RAM
MMC,
SD etc
HD
DRM ID
PWM Out
Audio DAC
µController
De/Encoder
Application Processor
Reset & WD
RTC
OSC/PLL
I²S
2w Interface
Headphone
Amplifier
Line
Outputs
Audio ADC
Microphone
Amplifier
Line
Inputs
PMU = Voltage Supply + Supply Supervision + Power-up + Hibernation
DC/DCs - LDOs Charger
Voltage Supply
Digital Interface
Audio Signal
3V-5V Battery 5V Charger
FM-
Radio
© 2003-2007, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Revision 1v3
2 - 93


Part Number AS3517
Description Stereo Audio Codec
Maker AMSCO
Total Page 30 Pages
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