STEVAL-CCA009V1 High performance stereo headphone driver demonstration board based on the TS4601B Data brief Features ■ Power supply range: 2.9 V to 5.5 V ■ 107 dB of PSRR at 217 Hz ■ Fully differential inputs ■ I2C interface for volume control ■ Digital volume control range from -60 dB to +4 dB ■ 101 dB of SNR A-weighted ■ Independent right and left channel shutdown control ■ Low quiescent current: 4.8 mA typ. at 3.0 V ■ Low standby current: 2 µA max ■ RoHS compliant STEVAL-CCA009V1 Description The STEVAL-CCA009V1 demonstration board is designed to evaluate the TS4601B, a stereo headphone driver dedicated to high audio performance and space constrained applications. It is based on low power dissipation, amplifier core technology with capacitor-less outputs and an I²C interface. The STEVAL-CCA009V1 demonstration board can drive at a minimum 0.9 Vrms output voltage into 16 Ω and 1.6 Vrms into 10 kΩ, whatever the power supply voltage, in the range from 2.9 V to 5.5 V. The I2C interface is used to control the volume by means of 64 steps from -60 dB to +4 dB and to configure the device in multiple modes. The traditionally used output-coupling capacitors can be removed and a dedicated common-mode sense pin suppresses parasitic noise from the jack. TS4601B control software is also provided. November 2010 Doc ID 18258 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 Circuit schematic STEVAL-CCA009V1 1 Circuit schematic Figure 1. TS4601 main application &Q 9FF,& 9FF & X) 3RZHU % 76 &Q *QG3 *QG 6WGE\ $ ,Q/ /HIW,QSXW & &Q & X) *QG3 *QG 5LJKW,QSXW & X) 6'$ 6&/ % ,Q5 % ,Q5 6&/ ,& 9FF # *QG 2/5 *QG3 *QG3 1HJDWLYH 5HJ & & 39VV # # # $ *QG3 & X) % 9RXW5 & - 5 *QG &Q *QG & X) &06 & Q) 1HJDWLYH 6XSSO\ 39FF $ /HIW2XWSXW 5 & 6'$ & &Q *QG & Q) 9RXW/ 6'= & X) ,Q/ $ *QG & X) 9FF *QG 3RVLWLYH 5HJ &Q &Q 8 9FF 5LJKW2XWSXW *QG *QG & X) *QG3 Doc ID 18258 Rev 1 76PDLQDSSOLFDWLRQ STEVAL-CCA009V1 Figure 2. Circuit schematic RS232 to I2C converter &Q 6&/ &Q 6'$ 6&/ 6'$ 9FF 5 . 5 . 9FF,& 5 8$ %6 .3 - '% 7 5 *1' '75 *1' 7;' 576 5 . '65 *QG3 *QG3 ' 1 8% .3 5 N *1' 5 . ' 1 *QG3 8& .3 *1' Doc ID 18258 Rev 1 *QG3 56WR,&FRQYHUWHU 3/5 Revision history 2 STEVAL-CCA009V1 Revision history Table 1. 4/5 Document revision history Date Revision 19-Nov-2010 1 Changes Initial release. Doc ID 18258 Rev 1 STEVAL-CCA009V1 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. 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