Three ADCs, One DAC, Low Power Codec with Audio DSPs

The ADAU1860/ADAU1860-1 are codecs with three inputs and one output that incorporate two digital signal processors (DSPs). The path from the analog input to the DSP core to the analog output is optimized for low latency and is ideal for noise canceling earphones. With the addition of just a few passive components, the ADAU1860/ADAU1860-1 provide a complete earphone solution.

APPLICATIONS

* Noise canceling handsets, headsets, and headphones

* Bluetooth active noise canceling (ANC) handsets, headsets, and headphones

* Personal navigation devices

* Digital still and video cameras

* Musical instrument effect processors

* Multimedia speaker systems

* Smartphones

* Programmable FastDSP audio processing engine

* Up to 768 kHz sample rate

* Biquad filters, limiters, volume controls, mixing

* Tensilica HiFi 3z DSP core

* Quad MAC per cycle: 24 x 24-bit multiplier and 64-bit accumulator

* Flexible power operation mode: 24.576 MHz, 49.152 MHz, 73.728 MHz, and 98.304 MHz

* 288 kB total memory

* JTAG debug and trace

* Low latency, 24-bit ADCs and DAC

* 106 dB SNR (signal through ADC with A-weighted filter)

* 110 dB combined SNR (signal through DAC and headphone with A-weighted filter)

* Programmable double precision MAC engine for maximum 24-stage equalizer

* Serial port sample rates from 8 kHz to 768 kHz

* 5 μs group delay (fS = 768 kHz) analog in to analog out with FastDSP bypass (zero instructions)

* 3 differential or single-ended analog inputs, configurable as microphone or line inputs

* 8 digital microphone inputs

* Analog differential audio output, configurable as either line output or headphone drive