data brief for further information contact your local stmicroelectronics sales office. november 2010 doc id 18258 rev 1 1/5 5 STEVAL-CCA009V1 high performance stereo headpho ne driver demonstration board based on the ts4601b features power supply range: 2.9 v to 5.5 v 107 db of psrr at 217 hz fully differential inputs i 2 c 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 a max rohs compliant 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 ? and 1.6 vrms into 10 k ? , whatever the power supply voltage, in the range from 2.9 v to 5.5 v. the i 2 c 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. STEVAL-CCA009V1 www.st.com
circuit schematic STEVAL-CCA009V1 2/5 doc id 18258 rev 1 1 circuit schematic figure 1. ts4601 main application & x ) & x ) & x ) & x ) * q g 3 * q g 3 * q g 3 * q g * q g 5 5 & q ) & q ) * q g * q g & q & x ) & x ) & x ) & x ) * q g * q g & q 6 w g e \ * q g 3 9 f f * q g 3 9 f f , & 9 f f * q g & q - * q g * q g & q / h i w , q s x w & q 5 l j k w , q s x w & q 3 r z h u & q * q g 3 / h i w 2 x w s x w 5 l j k w 2 x w s x w 9 f f 6 ' $ 6 & / , & 1 h j d w l y h 6 x s s o \ 1 h j d w l y h 5 h j 3 r v l w l y h 5 h j 3 9 f f * q g & & 6 ' $ 6 & / 9 f f , q / , q / , q 5 , q 5 9 r x w / 9 r x w 5 & 0 6 3 9 v v $ $ $ $ # # # # % % % % & & & & 6 ' = 8 7 6 7 6 p d l q d s s o l f d w l r q
STEVAL-CCA009V1 circuit schematic doc id 18258 rev 1 3/5 figure 2. rs232 to i 2 c converter 8 % . 3 8 & . 3 8 $ . 3 - ' % * 1 ' * 1 ' 9 f f * q g 3 * q g 3 * q g 3 * q g 3 * 1 ' * 1 ' 5 7 6 ' 6 5 7 ; ' ' 7 5 5 . 5 . 5 . 5 . 5 n 7 % 6 ' 1 ' 1 5 9 f f , & & q 6 & / & q 6 ' $ 6 & / 6 ' $ 5 5 6 w r , & f r q y h u w h u
revision history STEVAL-CCA009V1 4/5 doc id 18258 rev 1 2 revision history table 1. document revision history date revision changes 19-nov-2010 1 initial release.
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