Unlock a new level of audio experience with DDFA amplifier technology.

Qualcomm® DDFA™, our breakthrough digital audio amplifier technology, is driven by innovation and over a decade of R&D to help you create superior consumer audio experiences in digital speakers and soundbars of virtually all types. Setting a new benchmark in audio quality, our Direct Digital Feedback Amplifier (DDFA) technology is designed to help you innovate and deliver the ultimate in amplification technology to more consumer audio devices than ever before.

High-fidelity audio and design flexibility

DDFA technology—based on a unique closed-loop digital architecture—is engineered to combine the power advantages of class D amplifiers with the high performance of traditional linear amplifiers. The result? Near-perfectly balanced efficiency and audio quality designed to deliver a superior listening experience.

Advanced DSP features

In addition to a patented core architecture, next-generation DDFA technology is designed with an advanced configurable DSP, which helps provide 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.

Outstanding audio performance

Performance across the audio band

A unique and patented digital architecture is designed to deliver industry-leading audio performance across the entire audio frequency band:

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

Consistency

Closed-loop operation and high-resolution DSP help maintain audio performance consistency:

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

CSRA6620

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

CSRA6640

Qualcomm® CSRA6640 is a flexible, single-chip solution which is designed to bring a new level of integration to our patented DDFA amplifier technology. This tight integration makes superior class-D amplification more commercially viable for speakers and soundbars with smaller form factors.

Get started building with our audio solutions.

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Press Release

Mar 19, 2019

New Single-Chip Qualcomm DDFA Amplifier Solution Helps to Bring Clear, Powerful Sound for a Wider Variety of Speakers

Qualcomm DDFA, Qualcomm Smart Audio Platform, Qualcomm CSRA6620, and Qualcomm CSRA6640 are products of Qualcomm Technologies, Inc. and/or its subsidiaries.

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References to "Qualcomm" may mean Qualcomm Incorporated, or subsidiaries or business units within the Qualcomm corporate structure, as applicable.

Qualcomm Incorporated includes Qualcomm's licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm's engineering, research and development functions, and substantially all of its products and services businesses. Qualcomm products referenced on this page are products of Qualcomm Technologies, Inc. and/or its subsidiaries.

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