DDFA amplifier technology

Qualcomm DDFA is a product of Qualcomm Technologies International, Ltd.

Get more from your music with Qualcomm DDFA amplifier technology.

Our latest Qualcomm® DDFA™ digital amplifier technology is the result of over ten years research and development, with the aim of helping to bring high-end amplification to more consumer audio devices than ever before.

What does DDFA do differently?

DDFA is designed to combine power efficiency with high performance

DDFA technology is designed to combine the power advantages of class D amplifiers with the high performance of traditional linear amplifiers, engineered to perfectly balance efficiency and audio quality designed to deliver a superior listening experience. DDFA is a Direct Digital Feedback Amplifier based on a patented closed-loop digital architecture that is designed to provide multiple advantages over traditional analog class D amplifier solutions.

Outstanding Performance

A unique and patented digital architecture delivers market leading audio performance across the entire audio frequency band delivering:

  • SNR and Dynamic range > 113dB (A-weighted, 20Hz to 20KHz)
  • THD+N < 0.005% (20Hz to 20KHz)  

Closed-loop operation and high-resolution DSP helps maintain performances at all times:

  • Distortion does not increase at maximum volume like many other amps
  • No audible noise or hissing sound
  • Performances are maintained across a wide range of audio input formats  

Advanced DSP features.

As well as a patented core architecture, next generation DDFA technology is designed to integrate an advanced configurable DSP with high-resolution support, which helps to provide manufacturers comprehensive control on the audio path without relying on an external device.


With support for 32bit PCM up to 384KHz and DSD64/128 input, integrated high-resolution interpolation filters and equalizers, DDFA helps devices be compatible with today’s high-resolution trends.

Get started with CSRA6620.

Based on DDFA technology, the CSRA6620 is designed to deliver the high power efficiency of a class D amplifier with the fidelity of high end linear amplifiers.

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