AS3542-EMFP

AS3542-EMFP Datasheet

AS3542

Part	Datasheet
AS3542-EMFP	AS3542-EMFP (pdf)

PDF Datasheet Preview
AS3542 Data Sheet, Strictly Confidential Ultra Low Power Stereo Audio Codec with System PMU 1 General Description The AS3542 is an ultra low power stereo audio codec and is designed for Portable Digital Audio Applications. It allows CD quality playback with up to 96dBA SNR and recording in FM quality. With one microphone including pre-amplifier and supply for an electret microphone and one line input, it allows connecting a variety of audio inputs. The different audio signals can be mixed via a 6channel mixer and fed to either a headphone output for 16 /32 headsets or a line output. The audio outputs have also an auto fading implemented which performs the fade-in, fade-out as well as the transition between specific volume levels automatically with an selectable timing. Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player are supplied by the AS3542. It features 2 DCDC converters for core and memory/periphery supply as well as 4 LDOs. Both DCDC converter feature DVM dynamic voltage management with an selectable timing for the voltage stepping. The different regulated supply voltages are programmable via the serial control interface. The step-up converter for the backlight can operate up to 15V with an external transistor even higher in voltage and current control mode. An internal voltage protection is limiting the output voltage in the case of external component failures. An automatic dimming function allows a logarithmic on/off of the backlight with selectable timing. AS3542 also contains a Li-Ion battery charger with constant current, constant voltage and trickle charging. The maximum charging current is 460mA. An integrated battery switch is separating the battery during charging or whenever an external power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries. The AS3542 has an on-chip, phase locked loop PLL which generates the needed internal CODEC master clock. I2S Frame and shift-clock have to be applied from the processor for playback and recording. The single supply voltage may vary from 2.7V to 5.5V. 2 Key Features Audio Audio power consumption - 5mW 95dB DAC to Headphone 1.8V, Sigma Delta Converters DAC - 96dB SNR 'A' weighted 1.8V ADC - 85dB SNR 'A' weighted 1.8V Sampling Frequency - DAC 8-48kHz - ADC 8-24kHz High Efficiency Headphone Amplifier volume control via serial interface 32 steps and MUTE 2x12mW driver 1.8V supply THD -74dB 1.8V 2x40mW driver 2.9V supply THD -77dB 2.9V headphone and over-current detection Line Output volume control via serial interface 32 steps and MUTE 0.6Vp Microphone Input 3 gain pre-setting 30dB/36dB/42dB and AGC 32 gain steps and MUTE supply for electret microphone detection remote control by switch Line Input volume control via serial interface 32 steps and MUTE stereo or 2x mono 1 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - A p l ic a t i o n s Audio Mixer 6 channel input/output mixer with AGC mixes line input and microphone with DAC left and right channels independent Power Management Voltage Generation step down for CPU core 0.61V-3.35V, 250mA step down for peripheral 0.61V-3.35V, 250mA LDO1 for AFE supply 1.7V 1.65-3.2V , 50mA LDO2 for AFE supply 2.7V 2.3-3.5V , 200mA LDO3 for peripherals 1.2V-3.5V, 100mA LDO4 for peripherals 1.2V-3.5V, 100mA separate input for LDO3 power supply supervision & hibernation modes 5sec and 10sec emergency shut-down Backlight Driver step up for backlight 15V current control mode 1.2-36mA voltage control mode 1 HV current sink automatic dimming over-voltage protection Battery Charger automatic trickle charge 55mA prog. constant current charging 55-460mA prog. constant voltage charging 3.9V-4.25V current limitation for USB mode integrated battery switch General Supervisor automatic battery monitoring with interrupt generation and selectable warning level automatic temperature monitoring with interrupt generation and selectable warning and shutdown levels General Purpose ADC 10bit resolution 19 inputs analog multiplexer Interfaces 2 wire serial control interface reset pin with selectable delay, power good pin 64bit unique ID OTP 25 different interrupts Package MLF2 56 [7.0x7.0x0.85mm] 0.4mm pitch 3 Applications Portable Digital Audio/Video Player and Recorder PDA, Smartphone 2 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - A p l ic a t i o n s Figure Block Diagram 3 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - A p l ic a t i o n s Contents Pin Assignment Pin Description 5 Absolute Maximum Ratings 9 6 Electrical Characteristics 11 Audio Specification 7 Typical Operating Characteristics 14 8 Detailed Description - Audio Functions 15 Audio Line Input Microphone Input Line Output Headphone Output DAC, ADC and I2S Digital Audio Interface Audio Output Mixer 2-Wire-Serial Control Interface 9 Detailed Description - Power Management Functions 29 Low Drop Out Regulators DCDC Step-Down Converter 2x 15V Step-Up DCDC Converter Charger Battery Switch 10 Detailed Description - SYSTEM Functions 42 SYSTEM Hibernation Supervisor Interrupt Generation Real Time Clock 10-Bit ADC GPIO Pins 12-24MHz Oscillator Unique ID Code 64 bit OTP ROM 11 Register Definition 50 12 Application Information 82 13 Package Drawings and Markings 83 14 Ordering Information 85 4 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - A p l ic a t i o n s Owner pkm Description official release added audio characterisation data 5 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - P i n o u t 4 Pinout Pin Assignment Figure Pin Assignments Top View Pin Description Table Pin Description for AS3542 Pin Number Pin Name Type CHGOUT SUP IO Li-Ion Charger Output BVDDBSW SUP IO Battery Switch output to be connected against BVDD CHGIN SUP IN Li-Ion Charger Input BATTEMP ANA IO Li-Ion Charger Battery Temp. Sensor Input GND Power Management Neg. Reference Supply SW15V DIG OUT DCDC15V Switch Output to Coil VSSPWR GND Power Management Neg. Supply Terminal ISINK ANA IO DCDC15V Load Current Sink Terminal BVDDC2 SUP IN CVDD2 Step Down Pos. Supply Terminal LXC2 DIG OUT CVDD2 Step Down Switch Output to Coil CVDD2 ANA IN CVDD2 and Feedback Pin CVDD1 ANA IN CVDD1 and Feedback Pin LXC1 DIG OUT CVDD1 Step Down Switch Output to Coil BVDDC1 SUP IN CVDD1 Step Down Pos. Supply Terminal 6 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - P i n o u t Table Pin Description for AS3542 Pin Number Pin Name Type VSSPWR GND Power Management Neg. Supply Terminal PWRUP DIG IN Power Up Input FVDD SUP IN Digital Pos. Supply e.g. DAC, XRES DIG OUT Reset Output XIRQ DIG OUT Interrupt Request Output 14 Ordering Information Table Ordering Information Model AS3542-EMFP Ultra Low Power Stereo Audio Codec with System PMU Delivery Form Package Tape & Reel dry pack MLF2 56 [7.0x7.0x0.85mm] 0.4mm pitch 85 - 86 AS3542 3v2 Data Sheet, Strictly Confidential - O r d e r i n g I n f o r m a t i o n Copyrights Copyright 1997-2008, 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 or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification 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 lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. 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 A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 86 - 86

PDF Datasheet Preview

AS3542

Data Sheet, Strictly Confidential

Ultra Low Power Stereo Audio Codec with System PMU
1 General Description

The AS3542 is an ultra low power stereo audio codec and is designed for Portable Digital Audio Applications.

It allows CD quality playback with up to 96dBA SNR and recording in FM quality. With one microphone including pre-amplifier and supply for an electret microphone and one line input, it allows connecting a variety of audio inputs. The different audio signals can be mixed via a 6channel mixer and fed to either a headphone output for 16 /32 headsets or a line output. The audio outputs have also an auto fading implemented which performs the fade-in, fade-out as well as the transition between specific volume levels automatically with an selectable timing.

Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player are supplied by the AS3542. It features 2 DCDC converters for core and memory/periphery supply as well as 4 LDOs. Both DCDC converter feature DVM dynamic voltage management with an selectable timing for the voltage stepping. The different regulated supply voltages are programmable via the serial control interface.

The step-up converter for the backlight can operate up to 15V with an external transistor even higher in voltage and current control mode. An internal voltage protection is limiting the output voltage in the case of external component failures. An automatic dimming function allows a logarithmic on/off of the backlight with selectable timing.

AS3542 also contains a Li-Ion battery charger with constant current, constant voltage and trickle charging. The maximum charging current is 460mA. An integrated battery switch is separating the battery during charging or whenever an external power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries.

The AS3542 has an on-chip, phase locked loop PLL which generates the needed internal CODEC master clock. I2S Frame and shift-clock have to be applied from the processor for playback and recording.

The single supply voltage may vary from 2.7V to 5.5V.
2 Key Features

Audio

Audio power consumption - 5mW 95dB DAC to Headphone 1.8V,

Sigma Delta Converters DAC - 96dB SNR 'A' weighted 1.8V ADC - 85dB SNR 'A' weighted 1.8V Sampling Frequency - DAC 8-48kHz - ADC 8-24kHz

High Efficiency Headphone Amplifier volume control via serial interface 32 steps and MUTE 2x12mW driver 1.8V supply THD -74dB 1.8V 2x40mW driver 2.9V supply THD -77dB 2.9V headphone and over-current detection

Line Output volume control via serial interface 32 steps and MUTE 0.6Vp

Microphone Input 3 gain pre-setting 30dB/36dB/42dB and AGC 32 gain steps and MUTE supply for electret microphone detection remote control by switch

Line Input volume control via serial interface 32 steps and MUTE stereo or 2x mono
1 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - A p l ic a t i o n s

Audio Mixer 6 channel input/output mixer with AGC mixes line input and microphone with DAC left and right channels independent

Power Management

Voltage Generation step down for CPU core 0.61V-3.35V, 250mA step down for peripheral 0.61V-3.35V, 250mA LDO1 for AFE supply 1.7V 1.65-3.2V , 50mA LDO2 for AFE supply 2.7V 2.3-3.5V , 200mA LDO3 for peripherals 1.2V-3.5V, 100mA LDO4 for peripherals 1.2V-3.5V, 100mA separate input for LDO3 power supply supervision & hibernation modes 5sec and 10sec emergency shut-down

Backlight Driver step up for backlight 15V current control mode 1.2-36mA voltage control mode 1 HV current sink automatic dimming over-voltage protection

Battery Charger automatic trickle charge 55mA prog. constant current charging 55-460mA prog. constant voltage charging 3.9V-4.25V current limitation for USB mode integrated battery switch

General

Supervisor automatic battery monitoring with interrupt generation and selectable warning level automatic temperature monitoring with interrupt generation and selectable warning and shutdown levels

General Purpose ADC 10bit resolution 19 inputs analog multiplexer

Interfaces 2 wire serial control interface reset pin with selectable delay, power good pin 64bit unique ID OTP 25 different interrupts Package MLF2 56 [7.0x7.0x0.85mm] 0.4mm pitch
3 Applications

Portable Digital Audio/Video Player and Recorder PDA, Smartphone
2 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - A p l ic a t i o n s

Figure Block Diagram
3 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - A p l ic a t i o n s

Contents
Pin Assignment Pin Description 5 Absolute Maximum Ratings 9 6 Electrical Characteristics 11 Audio Specification 7 Typical Operating Characteristics 14 8 Detailed Description - Audio Functions 15 Audio Line Input Microphone Input Line Output Headphone Output DAC, ADC and I2S Digital Audio Interface Audio Output Mixer 2-Wire-Serial Control Interface 9 Detailed Description - Power Management Functions 29 Low Drop Out Regulators DCDC Step-Down Converter 2x 15V Step-Up DCDC Converter Charger Battery Switch 10 Detailed Description - SYSTEM Functions 42 SYSTEM Hibernation Supervisor Interrupt Generation Real Time Clock 10-Bit ADC GPIO Pins 12-24MHz Oscillator Unique ID Code 64 bit OTP ROM 11 Register Definition 50 12 Application Information 82 13 Package Drawings and Markings 83 14 Ordering Information 85
4 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - A p l ic a t i o n s

Owner pkm

Description official release added audio characterisation data
5 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - P i n o u t
4 Pinout

Pin Assignment

Figure Pin Assignments Top View

Pin Description

Table Pin Description for AS3542

Pin Number Pin Name Type

CHGOUT SUP IO Li-Ion Charger Output

BVDDBSW SUP IO Battery Switch output to be connected against BVDD

CHGIN SUP IN Li-Ion Charger Input

BATTEMP ANA IO Li-Ion Charger Battery Temp. Sensor Input

GND Power Management Neg. Reference Supply

SW15V DIG OUT DCDC15V Switch Output to Coil

VSSPWR GND Power Management Neg. Supply Terminal

ISINK

ANA IO DCDC15V Load Current Sink Terminal

BVDDC2 SUP IN CVDD2 Step Down Pos. Supply Terminal

LXC2 DIG OUT CVDD2 Step Down Switch Output to Coil

CVDD2 ANA IN CVDD2 and Feedback Pin

CVDD1 ANA IN CVDD1 and Feedback Pin

LXC1 DIG OUT CVDD1 Step Down Switch Output to Coil

BVDDC1 SUP IN CVDD1 Step Down Pos. Supply Terminal
6 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - P i n o u t

Table Pin Description for AS3542

Pin Number Pin Name Type

VSSPWR GND Power Management Neg. Supply Terminal

PWRUP DIG IN Power Up Input

FVDD

SUP IN Digital Pos. Supply e.g. DAC,

XRES DIG OUT Reset Output

XIRQ DIG OUT Interrupt Request Output
14 Ordering Information
Table Ordering Information

Model

AS3542-EMFP

Ultra Low Power Stereo Audio Codec with System PMU

Delivery Form

Package

Tape & Reel dry pack

MLF2 56 [7.0x7.0x0.85mm] 0.4mm pitch
85 - 86

AS3542 3v2

Data Sheet, Strictly Confidential - O r d e r i n g I n f o r m a t i o n

Copyrights

Copyright 1997-2008, 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 or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification 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 lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. 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 A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
86 - 86

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Datasheet ID: AS3542-EMFP 519685