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STA529Q Datasheet(PDF) 7 Page - STMicroelectronics

Part # STA529Q
Description  FFX™ audio codec with analog and digital inputs and 2 x 1.2 W (or 2 x 100 mW HP) class-D amplifier
PDF  57 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA529Q Datasheet(HTML) 7 Page - STMicroelectronics

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STA529
Description
Doc ID 13095 Rev 3
7/57
1
Description
The STA529 is a digital stereo class-D audio amplifier. It includes an audio DSP, an 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™. 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 and the I2C interface provides a
direct conversion of the input signal into output power. 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 packages TFBGA48 and VFQFPN52. These are very thin
packages (1.2 mm thick) ideal 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
OUT1A
OUT1B
OUT2A
OUT2B
VBIAS
INL
VHI
VCM
VLO
INR



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