CSRA6620 and Qualcomm DDFA are products of Qualcomm Technologies International, Ltd.


Next Generation Qualcomm® DDFA™ Amplifier Technology

DDFA technology is founded on a patented digital modulation and feedback technique, which corrects the distorting influences present in all Class D switching amplifiers which would normally compromise performance. DDFA is designed to deliver the high power efficiency of a class D amplifier, with the fidelity of high end linear amplifiers.


Our next generation DDFA Digital Amplifier Technology is ideal for manufacturers who want to integrate superior amplifier performance in a low complexity, cost effective way. It also offers compatibility with today’s high resolution 384kHz digital audio sources.

Qualcomm DDFA amplifier technology.

Qualcomm® DDFA™ digital amplifier 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.

CSRA6620 Specs


Dynamic Range

  • Up to 113dB
  • A-wt
  • 20Hz to 20Khz

Input Sample Rate

  • Up to 384 KHz

Noise floor modulation

  • <2dB (-60dBFS to 0dBFS)

Residual noise

  • 35μVrms @ 1Khz

Signal-To-Noise Ratio

  • 113 dB
  • A-wt
  • 20Hz to 20Khz

Stereo Crosstalk

  • -103dB @ 1Khz

Total Harmonic Distortion

  • < 0.002%
  • 20Hz to 20Khz