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.
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
- AD 400 kHz modulation, A-wt, 1 kHz, 0 dBFS
- AD modulation
Compare related products.
Note: to leverage the best experience for the product comparison table, please use the desktop to view content.
2 of 2 total products
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 | ||||||||||
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 |
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 |
- At 1 kHz
- AD 400 kHz modulation, A-wt, 1 kHz, 0 dBFS
- AD modulation
