AS3561-DWLT

AS3561-DWLT Datasheet

Figure 1 Added value of using AS3561

Part	Datasheet
AS3561-DWLT	AS3561-DWLT (pdf)

Related Parts	Information
AS3561-DWLM	AS3561-DWLM
AS3561 EVAL BOARD	AS3561 EVAL BOARD

PDF Datasheet Preview
Figure 1 Added value of using AS3561 Highly optimized system power consumption Popless startup and mute/unmute Full digital system control Direct Li-Ion battery operation No DC blocking capacitors Highest Noise Immunity PCB area optimized AS3561 Class-H Stereo Headphone Amplifier The AS3561 is a Class-H stereo headphone amplifier optimized for usage within portable devices. The Class-H supply rail adaptation is implemented by an integrated DCDC buck converter that takes its input directly from the battery. The continuous adoption of supply rails is done according to the input signal swing and load conditions. This architecture implements significant power savings compared to traditional Class-AB amplifiers. An control interface is implemented for a 32-step volume control including a mute function for each channel separately. The integrated charge pump generates a symmetric negative supply for true ground output signal levels without the need of output coupling capacitors. In addition it helps to lower the overall pop noise of the amplifier. A supervisory circuit is included for overtemperature and short-circuit protection. Differential inputs together with output ground sensing guarantees very low noise sensitivity. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of the AS3561 Class-H stereo headphone amplifier, are listed below: H-Class amplifier with integrated DCDC buck converter • 2x30mW, THD 16Ω • 100dB SNR 0.9Vrms • 1mA quiescent with both channels enabled Ultra low DC offset control interface Wide supply range 2.3V to 5.5V Charge pump for true ground headphone operation Two fully differential stereo inputs with ground sensing input Package 0.4mm Pitch WL-CSP x 1.615mm ams Datasheet [v1-07] 2014-Sep-26 Page 1 Document Feedback Figure 2 AS3561 Block Diagram AS3561 − General Description The AS3561 applications include • Mobile Phones • Portable Navigation Devices • Media Devices Block Diagram The functional blocks of this device for reference are shown below: Page 2 Document Feedback ams Datasheet [v1-07] 2014-Sep-26 AS3561 − Pin Assignments Pin Assignments Figure 3 Pin Assignments Top View The AS3561 pin assignments are described below: Figure 4 Pin Descriptions Pin Descriptions Pin Name SW AVDD HPL INLN AGND CPP HPVDD INLP Pin Number Buck converter switching node Primary power supply for device Left channel headphone amplifier output Inverting left input for differential signals; Connect to left input signal through 2.2uF capacitor for single-ended input applications Main Ground for headphone amplifiers, DC/DC converter, and charge pump Charge pump positive flying cap connect to 2.2uF flying capacitor Power supply for headphone amplifier DC/DC output node Non-inverting left input for differential signals; AS3561 − Ordering&ContactInformation Ordering & Contact Information Figure 42 Ordering Information Ordering Code AS3561-DWLT AS3561-DWLT-500 AS3561 Class-H Stereo Headphone Amplifier AS3561 Class-H Stereo Headphone Amplifier Delivery Form Tape & Reel Tape & Reel Package WL-CSP 16 WL-CSP 16 Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit: Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel +43 0 3136 500 0 Website: Page 30 Document Feedback ams Datasheet [v1-07] 2014-Sep-26 AS3561 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material . Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. ams Datasheet [v1-07] 2014-Sep-26 Page 31 Document Feedback Copyrights & Disclaimer AS3561 − Copyrights&Disclaimer Copyright ams AG, Tobelbader Strasse 30, 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams 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 ams AG rendering of technical or other services. Page 32 Document Feedback ams Datasheet [v1-07] 2014-Sep-26 AS3561 − Document Status Document Status Document Status Product Status Definition Product Preview Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Preliminary Datasheet Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Datasheet Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Datasheet discontinued Discontinued ams Datasheet [v1-07] 2014-Sep-26 Page 35 Document Feedback

PDF Datasheet Preview

Figure 1 Added value of using AS3561

Highly optimized system power consumption Popless startup and mute/unmute Full digital system control Direct Li-Ion battery operation No DC blocking capacitors Highest Noise Immunity PCB area optimized

AS3561

Class-H Stereo Headphone Amplifier
The AS3561 is a Class-H stereo headphone amplifier optimized for usage within portable devices. The Class-H supply rail adaptation is implemented by an integrated DCDC buck converter that takes its input directly from the battery. The continuous adoption of supply rails is done according to the input signal swing and load conditions. This architecture implements significant power savings compared to traditional Class-AB amplifiers. An control interface is implemented for a 32-step volume control including a mute function for each channel separately. The integrated charge pump generates a symmetric negative supply for true ground output signal levels without the need of output coupling capacitors. In addition it helps to lower the overall pop noise of the amplifier. A supervisory circuit is included for overtemperature and short-circuit protection. Differential inputs together with output ground sensing guarantees very low noise sensitivity. Ordering Information and Content Guide appear at end of datasheet.

Key Benefits & Features

The benefits and features of the AS3561 Class-H stereo headphone amplifier, are listed below:

H-Class amplifier with integrated DCDC buck converter
• 2x30mW, THD 16Ω
• 100dB SNR 0.9Vrms
• 1mA quiescent with both channels enabled

Ultra low DC offset
control interface

Wide supply range 2.3V to 5.5V

Charge pump for true ground headphone operation

Two fully differential stereo inputs with ground sensing input

Package 0.4mm Pitch WL-CSP x 1.615mm
ams Datasheet [v1-07] 2014-Sep-26

Page 1 Document Feedback

Figure 2 AS3561 Block Diagram

AS3561 − General Description

The AS3561 applications include
• Mobile Phones
• Portable Navigation Devices
• Media Devices

Block Diagram

The functional blocks of this device for reference are shown below:

Page 2 Document Feedback
ams Datasheet [v1-07] 2014-Sep-26

AS3561 − Pin Assignments

Pin Assignments

Figure 3 Pin Assignments Top View

The AS3561 pin assignments are described below:

Figure 4 Pin Descriptions

Pin Descriptions

Pin Name

SW AVDD HPL

INLN

AGND CPP HPVDD

INLP

Pin Number

Buck converter switching node

Primary power supply for device

Left channel headphone amplifier output

Inverting left input for differential signals;

Connect to left input signal through 2.2uF capacitor for single-ended
input applications

Main Ground for headphone amplifiers, DC/DC converter, and charge pump

Charge pump positive flying cap connect to 2.2uF flying capacitor

Power supply for headphone amplifier DC/DC output node

Non-inverting left input for differential signals;
AS3561 − Ordering&ContactInformation
Ordering & Contact Information
Figure 42 Ordering Information
Ordering Code

AS3561-DWLT AS3561-DWLT-500

AS3561 Class-H Stereo Headphone Amplifier AS3561 Class-H Stereo Headphone Amplifier

Delivery Form

Tape & Reel Tape & Reel

Package

WL-CSP 16 WL-CSP 16

Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit:

Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe

Tel +43 0 3136 500 0 Website:

Page 30 Document Feedback
ams Datasheet [v1-07] 2014-Sep-26

AS3561 − RoHS Compliant & ams Green Statement

RoHS Compliant & ams Green Statement

RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material .

Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
ams Datasheet [v1-07] 2014-Sep-26

Page 31 Document Feedback

Copyrights & Disclaimer

AS3561 − Copyrights&Disclaimer

Copyright ams AG, Tobelbader Strasse 30, 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.

Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
ams 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 ams AG rendering of technical or other services.

Page 32 Document Feedback
ams Datasheet [v1-07] 2014-Sep-26

AS3561 − Document Status

Document Status

Document Status Product Status

Definition

Product Preview

Pre-Development

Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice

Preliminary Datasheet

Pre-Production

Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice

Datasheet

Production

Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade

Datasheet discontinued

Discontinued
ams Datasheet [v1-07] 2014-Sep-26

Page 35 Document Feedback

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Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS3561-DWLT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3561-DWLT 519686