STA529Q STMicroelectronics

STA529 2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX Data Brief Features Up to 96 dB dynamic range Sample rates from 8 kHz to 192 kHz TM FFX class-D driver 1.5 V to 1.95 V digital power supply 1.5 V to 1.95 V analog power supply TM 18-bit audio processing and class-D FFX modulator TFBGA48 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 2-channel I 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: VFQFPN52 50 mW stereo into 32 headphone 100 mW stereo into 16 headphone Order codes Part number Package Packaging STA529B TFBGA48 Tube STA529Q VFQFPN52 Tube December 2006 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 1MUX MUX MUX Introduction STA529 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 TM provides output capabilities for FFX . 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 2 the input signal into output power (the I 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 Serial digital audio interface OUT1A Power driver OUT1B FFX Digital VBIAS modulator volume INL OUT2A Power ADC VHI driver OUT2B VCM PWM out I/F PGA VLO INR ADC Control OSC PLL Divider interface 2/4 VDD AVCC AGND GND BICLKI BICLKO/PWM1A LRCLKI LRCLKO/PWM1B SDATAI SDATAO/PWM2A TM RST N XTO STBY MUTE XTI POWERFAULT/ EADP MCLK33 SELCLK33 FILT GNDIO VDDPLL VDDIO GNDPLL CLKOUT/ PWM2B GND33 VCC33 SDA GND2 SCL GND1 I2CDIS VCC2 VCC1