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 ■ FFXTM 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 FFXTM 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 I2S input/output data interface ■ Digitally controlled POP-free operation ■ Input and output channel mapping ■ 250 mΩ output CMOS Rdson ■ > 90% efficiency ■ Stereo headphone plus mono speaker application: – 50 mW stereo into 32 Ω headphone – 100 mW stereo into 16 Ω headphone TFBGA48 VFQFPN52 Order codes Part number Package Packaging STA529B TFBGA48 Tube STA529Q VFQFPN52 Tube December 2006 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 1 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 provides output capabilities for FFXTM. 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 I2C 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. VCC1 VCC2 GND1 GND2 VCC33 GND33 VDDIO GNDIO MUTE POWERFAULT/ EADP TM RST_N STBY SDATAI SDATAO/PWM2A LRCLKI LRCLKO/PWM1B BICLKI BICLKO/PWM1A GND Block diagram VDD Figure 1. Serial digital audio interface MUX CLKOUT/ PWM2B GNDPLL Divider FILT VDDPLL MCLK33 PLL XTI XTO AGND AVCC OSC 2/4 OUT2B Control interface I2CDIS ADC INR OUT1B PWM out I/F PGA SELCLK33 VLO OUT2A SCL VCM Power driver SDA ADC MUX MUX INL VHI OUT1A FFX modulator Digital volume VBIAS Power driver STA529 Revision history Revision history Table 1. Date 18-Dec-2006 Document revision history Revision 1 Changes Initial release 3/4 STA529 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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