CSRA6640
Single-chip DDFA amplifier technology
Single-chip DDFA amplifier technology
Qualcomm® CSRA6640 is a flexible, single-chip solution which is designed to bring a new level of integration to our patented Qualcomm® DDFA™ amplifier technology.
This tight integration makes superior class-D amplification more commercially viable on smaller form factors and lower-cost products, so that manufacturers can differentiate by supporting premium sound quality in their mid-to-high-end audio products.
CSRA6640 is designed to offer multiple development advantages for premium audio performance, including reduced BOM and reduced design complexity.
Qualcomm CSRA6620 and Qualcomm DDFA are products of Qualcomm Technologies, Inc., and/or its subsidiaries.
Featured Documents
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
Highly integrated single-chip architecture with DDFA Digital PWM modulator, analog feedback processor, power management unit with single input power supply, 2x20W BTL or 1x40W PBTL output stage, and thermal protection.
Integrated microcontroller and OTP Memory
High-resolution configurable DSP with 8 channels, 2 channels out, with integrated audio mixer
Up to 384kHz PCM and TDM inputs, as well as DSD64/128
Automatic sample rate detection and conversion
Bass and treble crossovers and tone control
15 biquad filters per channels
Choice of interpolation filters with different sound characters
Independent volume controls
Delay lines for driver alignment
Dynamic compression and soft clipping management
Flexible PWM configuration with 400KHz and 800Khz modulation, AD and BD modulation options
Cascade mode with four CSRA6640 combined for up to eight channels output sharing a single TMD bus and crystal
Serial control interface over SPI/I2C
Tuning tools for PCs
Specifications
General Audio
Audio Technology: Qualcomm® DDFA™ amplifier technology
Noise floor modulation: <2dB (-60dBFS to -1dBFS)
Residual noise: < 35μVrms (AD modulation)
Signal-To-Noise Ratio: >112dB (AD 400kHz modulation, A-wt, 1kHz, 0dBFS)
Stereo Crosstalk: -103dB @ 1Khz
Audio Recording
Sampling, Record: Up to 384 KHz
Audio Playback
Playback Dynamic Range: Up to 113dB, 20Hz to 20Khz
Total Harmonic Distortion + Noise (THD+N), Playback: 20Hz to 20Khz, < 0.002%
Package
Package Type: QFN
Pitch: 0.4mm Pitch
Package Size: 9 x 9 x 0.9 mm
Compare related products.
| Noise floor modulation | Residual noise | Signal-To-Noise Ratio | Stereo Crosstalk | Playback Dynamic Range | Total Harmonic Distortion + Noise (THD+N), Playback | Package Type | Pitch | Package Size |
|---|---|---|---|---|---|---|---|---|
<2dB (-60dBFS to -1dBFS) | < 35μVrms (AD modulation) | >112dB (AD 400kHz modulation, A-wt, 1kHz, 0dBFS) | -103dB @ 1Khz | Up to 113dB 20Hz to 20Khz | 20Hz to 20Khz < 0.002% | QFN | 0.4mm Pitch | 9 x 9 x 0.9 mm |
<2dB (-60dBFS to 0dBFS) | 35μVrms @ 1Khz | 20Hz to 20Khz A-wt 113dB | -103dB @ 1Khz | Up to 113dB 20Hz to 20Khz | 20Hz to 20Khz < 0.002% | QFN | 0.4mm Pitch | 9 x 9 mm |