data brief for further information contact your local stmicroelectronics sales office. december 2006 rev 1 1/4 1 STA529 2 x 100 mw class-d amplifier wi th analog or digital input 2.0 multichannel digital audio processor with ffx features up to 96 db dynamic range sample rates from 8 khz to 192 khz ffx tm class-d driver 1.5 v to 1.95 v digital power supply 1.5 v to 1.95 v analog power supply 18-bit audio processing and class-d ffx tm modulator digital volume control: ? +36 db to 105 db in 0.5 db steps ? software volume update individual channel and master gain/attenuation automatic invalid input detect mute 2-channel i 2 s input/output data interface digitally controlled pop-free operation input and output channel mapping 250 m ? output cmos r dson > 90% efficiency stereo headphone plus mono speaker application: ? 50 mw stereo into 32 ? headphone ? 100 mw stereo into 16 ? headphone order codes tfbga48 vfqfpn52 part number package packaging STA529b tfbga48 tube STA529q vfqfpn52 tube www.st.com
introduction STA529 2/4 introduction the STA529 is a digital stereo class-d audio amplifier. it includes an audio dsp, a st proprietary high-efficiency class-d driver and cmos power output stage. it is intended for high-efficiency digital-to-power-audio conversion for portable applications. the STA529 also provides output capabilities for ffx tm . in conjunction with a power device, the STA529 provides high-quality digital amplification. the STA529 contains an on-chip volume/gain control. the pwm amplifier achieves greater than 90% efficiency for longer battery life for portable systems. the innovative class-d modulation, allows the STA529 to work without external lc filters and without a heatsink. the STA529 i2cdis pin disables the audio dsp functions to provide a direct conversion of the input signal into output power (the i 2 c interface is disabled). this conversion is done without the microcontroller. the STA529 is designed for low-power operation with extremely low-current consumption in standby mode. it is available in two packages: the tfbga48 and the vfqfpn52. these are very thin packages (1.2 mm thick) intended for small portable applications. figure 1. block diagram power driver power driver control interface divider pll osc ffx modulator pwm out i/f adc adc serial digital audio interface pga digital volume rst_n tm stby mute powerfault/ biclko/pwm1a lrclki lrclko/pwm1b sdatai sdatao/pwm2a gndio vddio gnd33 vcc33 gnd2 gnd1 vcc2 vcc1 vdd gnd biclki avcc agnd xto selclk33 filt vddpll gndpll clkout/ sda scl i2cdis xti mclk33 out1a out1b out2a out2b vbias inl vhi vcm vlo inr mux mux mux eadp pwm2b
STA529 revision history 3/4 revision history table 1. document revision history date revision changes 18-dec-2006 1 initial release
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