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.
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.
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.
A unique and patented digital architecture is designed to deliver industry-leading audio performance across the entire audio frequency band:
Closed-loop operation and high-resolution DSP help maintain audio performance consistency:
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.
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.
Qualcomm DDFA, Qualcomm Smart Audio Platform, Qualcomm CSRA6620, and Qualcomm CSRA6640 are products of Qualcomm Technologies, Inc. and/or its subsidiaries.