STA529B [STMICROELECTRONICS]

2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX; 2×100毫瓦的D类放大器，具有模拟或数字输入2.0多声道数字音频处理器与FFX


型号：	STA529B
厂家：	ST
描述：	2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX 2×100毫瓦的D类放大器，具有模拟或数字输入2.0多声道数字音频处理器与FFX 消费电路商用集成电路音频放大器视频放大器
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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

■ FFX 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

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-channel I S input/output data interface

■ Digitally controlled POP-free operation

■ Input and output channel mapping

■ 250 mΩ output CMOS R

dson

■ > 90% efficiency

■ Stereo headphone plus mono speaker

application:

VFQFPN52

– 50 mW stereo into 32 Ω headphone

– 100 mW stereo into 16 Ω headphone

Order codes

Part number

Package

Packaging

STA529B

STA529Q

TFBGA48

Tube

VFQFPN52

December 2006

Rev 1

1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

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 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

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

modulator

Digital

volume

VBIAS

INL

VHI

OUT2A

OUT2B

Power

driver

ADC

VCM

PWM out I/F

PLL Divider

PGA

VLO

INR

Control

interface

OSC

2/4

STA529

Revision history

Table 1.

Date

18-Dec-2006

Document revision history

Revision

Changes

Initial release

3/4

STA529

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