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TMCNet: Conexant introduces new low power audio codec

[January 09, 2013]

Conexant introduces new low power audio codec

Jan 09, 2013 (Datamonitor via COMTEX) -- Conexant Systems Inc., a provider of semiconductor solutions for imaging, audio, embedded modem and video surveillance applications, has announced the introduction of the CX20787, an ultra low-power, I2S audio codec with integrated stereo class-D speaker amplifiers and class-G headphone amplifiers.


When combined with Conexant's software algorithms and design support, the CX20787 becomes an ideal turnkey solution for applications that require high-quality audio performance such as tablets, ultrabooks, portable media players, and smartphones. The CX20787 satisfies the demand for high-quality audio in these devices while consuming little power, thus helping to preserve battery life, the company said.

Featuring integrated digital signal processing (DSP), fully configurable hardware EQ and dual-knee dynamic range control (DRC) with reconfigurable inputs or outputs, the CX20787 maximizes speaker loudness without distortion, performs loudness compensation, improves frequency response, protects speakers from over-driving, and extends the microphone pick-up range for Far-Field speakerphone applications, the company added.

The CX20787 has a pair of ProCoustic capless headphone drivers, which eliminate the need for external DC blocking capacitors, and its detect and switch support capabilities support a variety of headsets. The CX20787 also supports DSP side-port to Conexant's Digital Audio processor, which adds advanced voice preprocessing and low power Wake-on-Voice function in the portable device.

According to the company, the CX20787 features capless stereo class-G headphone driver with single-ended external mono mic; stereo differential speaker with class-D amplifier; HW audio signal processing including a fully configurable 5-band bi-quad EQ on stereo output and dual-knee stereo DRC with reconfigurable inputs; multiple independent asynchronous sample rate converters (ASRC); write sequencer to minimize setup and simplify programming; load based speaker protection including power averaging, short circuit, DC protection, over temperature and high pass filtering; and popShield circuitry to eliminate pops and clicks.

It comes with three differential mic/line shared with digital mic ports; two mic bias with programmable microphone boost; stereo digital microphone with programmable clock source; three I2S ports with integrated PLLs; multiple GPIO's with hardware volume control; jack sense with debounce; wind noise filter; sidetone with selectable gain; and stereo differential or SE line-outs.

"Long battery life, small footprint and low cost, along with superior audio fidelity, are absolute must-haves to win in the portable market," said Jonathan Chien, executive director of marketing for Conexant. "With the introduction of the CX20787, we are providing an optimum solution with ultra low-power and a superior audio experience, paired with our renowned voice processing algorithms, while enabling our customers to save on bill of materials costs." http://www.datamonitor.com Republication or redistribution, including by framing or similar means, is expressly prohibited without prior written consent. Datamonitor shall not be liable for errors or delays in the content, or for any actions taken in reliance thereon

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