STA529中文资料2 x 100 mW class-D amplifer with analog or digital input, 2.0 multichannel digital audio processor with FFX数据手册ST规格书

描述 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.

特性 Features

Up to 96 dB dynamic range
Sample rates from 8 kHz to 192 kHz
FFX™class-D driver
1.55 V to 1.95 V digital power supply
1.80 V to 3.60 V analog and I/O power supply
18-bit audio processing and class-D FFX™modulator
>90-dB SNR analog-to-digital converter
Digital volume control:+36 dB to -105 dB in 0.5-dB steps
Software volume update

16-bit ADC
Individual channel and master gain/attenuation
Automatic invalid input detect mute
2-channel I2S input/output data interface
Digitally controlled pop-free operation
90% efficiency
Output power for stereo headphones or stereo speakers applications (at THD = 10% and V
CC= 3.3 V):45 mW with 32-Ω headphones
85 mW with 16-Ω headphones
720 mW with 8-Ω speakers
1.1 W with 4-Ω speakers