NXP’s Portable devices audio interface block diagram

Description

Digital Interfaces
Our digital in audio amplifier family (TFA9881/TFA9882/..) is built to simplify the audio architecture in mobile phones and portable applications by lowering the system cost and enabling easy interfacing. Using a digital interface eliminates the need for a D/A converter in the host processor, and the PDM or I2S format guarantees the an ultra small IC footprint.
The digital interface assures low RF susceptibility, in the device and the total system, and low sensitivity to input clock jitter. In addition, the digital interface eliminates the need for couple capacitors and safeguard speakers by eliminating problems coming from DC offsets due to leakage currents of an analog design.

Optional control tokens embedded in the audio stream of the NXP TFA 98xx digital Audio amplifier family can be used to control: mute/power-down mode, gain, clip behavior, bandwidth extension, and output slope.
I2S-input Class D: 1-direction data (+ control tokens) via 3 wires, 2 channels,
PDM-input Class D: 1-direction data (+ control tokens) via 2 wires, 2 channels

Ultra low power audio DSP
Your business will be more successful when you are able to lower costs and achieve a shorter time to market. NXP can help you with that by sharing our technology with you. CoolFlux DSP is an audio DSP core developed with years of experience in Ultra Low Power Design. Recently NXP completed a new core in the CoolFlux DPS family optimized for Baseband Signal Processing such as for Software Defined Radio: the CoolFlux BSP. Find out more about CoolFlux DSP & CoolFlux BSP

For additional information, download application guide

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