Four ADC, Two DAC, Low Power Codec with Audio DSPs

The ADAU1787 is a codec with four inputs and two outputs that incorporates 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 cancelling headsets. With the addition of just a few passive components, the ADAU1787 provides a complete headset solution.

Note that throughout the data sheet, multifunction pins, such as BCLK0/MP1, are referred to either by the entire pin name or by a single function of the pin, for example, BCLK0, when only that function is relevant.

Applications

* Noise cancelling handsets, headsets, and headphones

* Bluetooth 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

* 28-bit SigmaDSP audio processing core

* Visually programmable using SigmaStudio

* Up to 50 MIPS performance

* Low latency, 24-bit ADCs and DACs

* 96 dB SNR (signal through PGA and ADC with A-weighted filter)

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

* Serial port fSYNC frequency from 8 kHz to 768 kHz

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

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

* 8 digital microphone inputs

* 2 analog differential audio outputs, configurable as either line output or headphone driver