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CSRA6620

DDFA amplifier technology controller and feedback processor

The Qualcomm® CSRA6620 SoC is a highly-integrated digital stereo amplifier controller, designed to combine the power efficiency of Class D technologies with the audio performance of linear amplifiers. CSRA6620 is the first of our new generation of Qualcomm® DDFA™ amplifier products.

DDFA technology is founded on a patented digital modulation and feedback technique, which is designed to correct the distorting influences present in all Class D switching amplifiers to help improve performance. DDFA is designed to deliver the high power e...

Qualcomm CSRA6620 and Qualcomm DDFA are products of Qualcomm Technologies, Inc., and/or its subsidiaries.

Product license agreement
Featured DocumentsProduct Brief
Product Brief

DDFA amplifier technology

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 to help deliver a superior listening experience.

Features

  • DDFA Digital PWM modulator
  • Analog feedback processor
  • Integrated microcontroller and OTP Memory
  • Power management unit with single input power supply
  • Configurable DSP
  • Cascade mode with four CSRA6620 combined for up to 8 channels output.
  • AD and BD modulation options with support for discrete and monolithic output stages
Specifications
Audio
Audio Capturing Technologies
Qualcomm® DDFA™ amplifier technology
Interfaces
Supported Interfaces
SPI, I²C
Audio Characteristics
Bandwidth
20 Hz to 20000 Hz
Signal-To-Noise Ratio
At least 113 dB
Residual noise
Less than 35 μVrms1
Noise Floor Modulation
Less than 2 dB (-60 dBFS to 0 dBFS)
Stereo Crosstalk
-103 dB @ 1 kHz
Features
A-wt
Audio Playback Interfaces
Dynamic Range
Up to 113 dB
Bandwidth
20 Hz to 20000 Hz
Total Harmonic Distortion + Noise (THD+N)
Less than -94 dB
Audio Recording Interfaces
Sample Rate
Up to 384 kHz
  1. At 1 kHz

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Product

Audio Characteristics

Signal-To-Noise Ratio

Residual noise

Noise Floor Modulation

Stereo Crosstalk

Features

Audio Playback Interfaces

Bandwidth

Total Harmonic Distortion + Noise (THD+N)

Package

Type

Size

Pitch

Other

CSRA6620
Active

At least 113 dB

Less than 35 μVrms1

Less than 2 dB (-60 dBFS to 0 dBFS)

-103 dB @ 1 kHz

A-wt

20 Hz to 20000 Hz

Less than -94 dB

QFN

9 × 9 mm

0.4 mm

CSRA6640
Active

At least 112 dB2

Less than 35 μVrms3

Less than 2 dB (-60 dBFS to -1 dBFS)

-103 dB @ 1 kHz

—

20 Hz to 20000 Hz

Less than -94 dB

QFN

9 × 9 × 0.9 mm

0.4 mm

  1. At 1 kHz
  2. AD 400 kHz modulation, A-wt, 1 kHz, 0 dBFS
  3. AD modulation

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