Multi-Core DSP, Low Power Smart Codec with Integrated Sensor Hub
The CS47L85 combines a 900 MIPS multi-core audio signal processor with a high performance 6/8 channel 24-bit high-fidelity codec embedded with SoundClear® software technology to support multiple concurrent audio functions including multi-microphone wideband noise reduction, acoustic echo cancelation (AEC), stereo ambient noise cancelation (ANC) and speed and media enhancement. SoundClear Control provides “always on, always listening” multi-trigger word detection without keeping the applications processor awake to conserve standby-mode power. SoundClear Sense supports applications that increase contextual awareness, including advanced motion sensing and pedestrian navigation functionality. The IC also includes 3 stereo, multi-purpose headphone output drivers plus 2 stereo Class D speaker output drivers, and a 4-channel digital speaker interface. The power, clocking and output driver architectures of the CS47L85 are designed to maximize battery life for voice, music and standby modes using 1.8 V and 1.2 V external supplies.
Technologies
Signal Chain Position
Features
- 900 MIPS, 900 MMAC multi-core audio-signal processor
- Enhanced DRE processing (eDRE) for 121dB SNR
- Fixed function signal-processing functions
- Multi-channel asynchronous sample-rate conversion
- Integrated multi-channel 24-bit hi-fi audio hub codec
- Four digital microphone inputs (two stereo interfaces)
- Three stereo headphone/earpiece/line output drivers
- Two 2 W Class D speaker output drivers
- Four full digital audio interfaces
- Sample rates 8 kHz up to 192 kHz
- Flexible clocking, derived from MCLKn or AIFn
- Three low power frequency-locked loops (FLLs) support reference clocks down to 32 kHz
- Ultra low power consumption for “always on” functions
- Configurable functions up to 40 GPIO pins
- Integrated regulators and charge pumps
- Small WCSP package, 0.4-mm, 176-ball array
Parametric Specifications
| DACs | 8 |
| ADCs | 6 |
| DAC Dynamic Range (dB) | 121 |
| ADC Dynamic Range (dB) | 100 |
| DAC THD+N (dB) | -91 |
| ADC THD+N (dB) | -88 |
| Sample Rate (kHz) | 192 |
| Analog Power Supply (V) | 1.8 |
| Supply Current (µA) | 1.2-1.8 |
| Package | 176 WCSP |
