STEVAL-CCA025V1

STEVAL-CCA025V1 Class G capless headphone amplifier demonstration board based on the TS4621E Data brief Features ■ Power supply range: 2.3 V to 4.8 V ■ 0.6 mA/channel quiescent current ■ 2.1 mA current consumption with 100 µW/channel (10 dB crest factor) ■ 0.006% typical THD+N at 1 kHz ■ 100 dB typical PSRR at 217 Hz ■ Zero pop and click ■ I2C interface for volume control ■ Digital volume control range: -60 dB to +4 dB ■ 100 dB of SNR A-weighted at G = 0 dB ■ Independent right and left channel enable control ■ Integrated high-efficiency buck converter ■ Low standby current: 5 µA max ■ No output coupling capacitors (thanks to the internal negative supply) ■ Thermal shutdown and short-circuit protection ■ RoHS compliant STEVAL-CCA025V1 Description The STEVAL-CCA025V1 demonstration board is designed to aid in the evaluation of the TS4621E audio differential input stereo headphone amplifier. The TS4621E device is soldered on a four-layer PCB. An on-board RS-232 to I2C interface renders the board easy to control from a personal computer through a serial port. The software provided with the board controls all features of the TS4621E, such as gain, mode, mute, standby and register status. You can also use the connectors on the demonstration board to directly control the features through another I2C interface. September 2011 Doc ID 17667 Rev 2 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Schematic diagrams STEVAL-CCA025V1 1 Schematic diagrams Figure 1. Circuit schematics 6CC #N 6CC)# # —& 0OWER ! #N 'ND 5 3W 0OSITIVE (P6DD " SUPPLY #N 'ND # —& ! )N, " )N,  —( ! !6DD # —& ,EVEL DETECTOR  # N& ,EFTOUTPUT 2    #-3 # # —& # —& 3$! 3#, 'ND # )N2 $ $ 3#, )# #N # N& .EGATIVE SUPPLY 06SS   $ 3$! * 2 6OUT2 $ ,EVEL DETECTOR  )N2 #N 'ND #  —& 6OUT, ! #N 2IGHTINPUT 'ND 'ND ,EFTINPUT 'ND (06DD , 'ND 2IGHTOUTPUT 'ND 06SS # # # " # 'ND !'ND " 43%?&# 'ND # —& 'ND # —& 43%MAIN APPLICATION #N 3#, #N 3$! 3#, 3$! 6CC 6CC)# #N 2 + 2 + 6CC)# 2   5!   1 1 2  +0 * '.$  $42  48$ 243  $32  $" 1  'ND 'ND 'ND '.$ 2 + 'ND $  . 5"    +0 2 K '.$ 2 + $  . 'ND 5#    +0 '.$ 'ND 23TO)#CONVERTER !-6 2/4 Doc ID 17667 Rev 2 STEVAL-CCA025V1 2 Revision history Revision history Table 1. Document revision history Date Revision Changes 23-Jun-2010 1 Initial release. 22-Sep-2011 2 The device under evaluation has been changed. Updated Figure 1: Circuit schematics. Doc ID 17667 Rev 2 3/4 STEVAL-CCA025V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4 Doc ID 17667 Rev 2