STA529:2 x 100 mW class-D amplifer with analog or digital input, 2.0 multichannel digital audio processor with FFX

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.

Key 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 I2 S input/output data interface
  • Digitally controlled pop-free operation
  • 90% efficiency
  • Output power for stereo headphones or stereo speakers applications (at THD = 10% and VCC = 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
Product Specifications
DescriptionVersionSize
DB0353: 2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX1.381 KB
DS5050: FFX™ audio codec with analog and digital inputs and 2 x 1.2 W (or 2 x 100 mW HP) class-D amplifier3.0509 KB
Application Notes
DescriptionVersionSize
AN4118: APWLink USB interface board for Sound Terminal® demonstration boards2.01 MB
AN2542: Demo board BT-HTS-Rx_V1.0 for audio receiver using Bluetooth® wireless technology2.2766 KB
AN2612: How to use the BT_HTS_RX_R2 evaluation board1.21 MB
AN3984: IIR filter design equations for Sound Terminal® devices1.1493 KB
AN3340: Loudspeaker characterization and compensation1.33 MB
User Manuals
DescriptionVersionSize
UM0457: How to use the BT_HTS_RX_R21.2376 KB
UM1545: Using the Audio Processor Workbench (APWorkbench)1.03 MB
Flyers
DescriptionVersionSize
APWorkbench software for audio ICs and MEMS microphones1.02 MB
Sound Terminal for portable audio1.0200 KB
Brochures
DescriptionVersionSize
Analog audio solution1.01 MB
FFX - Full flexible amplification4 MB
FFX Full flexible amplification1.04 MB
Sample & Buy
Part NumberQuantityUnit Price (US$) *PackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)ECCN (EU)ECCN (US)Country of Origin
STA529Q10002.841VFQFPN2 52 8x8x1.0Tray070NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STA529QVFQFPN2 52 8x8x1.0IndustrialEcopack3md_90-wspc-vfqfpn2-wspc-8x8x1-wspc-52pitch0.5_a590-wspc-v519acg.pdf
md_90-wspc-vfqfpn2-wspc-8x8x1-wspc-52pitch0.xml
FFX™ audio codec with analog and digital inputs and 2 x 1.2 W (or 2 x 100 mW HP) class-D amplifier STA529
circuit_diagram_13095_thumbnail.png STA529
2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX STA529
DB0353: 2 x 100 mW class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX STA529
APWLink USB interface board for Sound Terminal® demonstration boards STEVAL-CCA030V1
Demo board BT-HTS-Rx_V1.0 for audio receiver using Bluetooth® wireless technology STA529
How to use the BT_HTS_RX_R2 evaluation board STA529
IIR filter design equations for Sound Terminal® devices STA321MP
Loudspeaker characterization and compensation APWORKBENCH
How to use the BT_HTS_RX_R2 STA529
Using the Audio Processor Workbench (APWorkbench) STEVAL-CCA030V1
Loudspeaker characterization and compensation APWORKBENCH
Using the Audio Processor Workbench (APWorkbench) STA529
Using the Audio Processor Workbench (APWorkbench) STA339BWS
Using the Audio Processor Workbench (APWorkbench) STA339BWS
Using the Audio Processor Workbench (APWorkbench) STA339BWS
md_90-wspc-vfqfpn2-wspc-8x8x1-wspc-52pitch0.5_a590-wspc-v519acg.pdf STA529
md_90-wspc-vfqfpn2-wspc-8x8x1-wspc-52pitch0.xml STA529