Low power audio codec optimizes performance and prevents speaker damage

Maxim Integrated Products has introduced the MAX98089, a highly integrated stereo audio codec targeted at portable multimedia applications such as tablets, netbooks, and mobile phones. It is said to improve audio performance and prevent speaker damage, while a graphical user interface (GUI) is claimed to significantly ease the design in of the product.

To minimize the number of discrete components required in the solution, integrated jack detection detects the insertion and removal of accessories as well as button presses.

The DAC-to-headphone idle power consumption is only 5.6mW, which represents a 15% improvement compared to the competition and extends battery life. The MAX98089 features Maxim's proprietary FlexSound(tm) audio technology which optimizes the signal level and frequency response, while limiting the maximum distortion and power at the output.

This technology improves loudspeaker performance and prevents speaker damage. The FlexSound audio technology comes with an extensive toolkit for improving loudspeaker playback performance and voice transmission.

The GUI supports evaluation and optimisation of the MAX98089's 5-band parametric EQ, automatic level control (ALC), speaker excursion limiter, speaker power limiter, and speaker distortion (THD) limiter. Example software drivers are available for Linux and other OS platforms.

To make the best use of the MAX98089's ADC dynamic range and to improve voice conversion, automatic gain control (AGC) and a noise gate optimize the signal level of microphone's input signals. It integrates a Class H stereo headphone amplifier with a dual-mode charge pump.

This architecture eliminates the need for bulky output capacitors and ensures click-and-pop-free operation during turn-on, turn-off, and volume changes. Ground sense reduces the output noise caused by ground-return current. Low-EMI, stereo, Class D speaker amplifiers provide filterless operation in the amplification of two speakers. These integrated amplifiers provide the performance required by today's applications without resorting to discrete amplifiers.

The MAX98089 is available in a space-saving (3.8mm x 3.3mm, 0.4mm pitch), 63-bump WLP or a 7mm x 7mm, 56-pin TQFN and is fully specified for the -40°C to +85°C extended temperature range. Prices start at $2.13 (1000-up, FOB USA).

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This article originally appeared on EE Times Europe.

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