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Maxim Integrated Products has introduced the MAX98089, a highly integrated stereo audio codec that has been developed to improve audio performance and prevent speaker damage. An easy-to-use graphical user interface (GUI) significantly eases the design in of the product and in order to minimise the number of discrete components required and 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 and extends battery life.
The MAX98089 is suitable for portable multimedia applications such as tablets, netbooks, and mobile phones. It features the company’s proprietary FlexSound audio technology which optimises 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 easy-to-use GUI lets you evaluate and then optimise the MAX98089’s 5-band parametric EQ, automatic level control (ALC), speaker excursion limiter, speaker power limiter, and speaker distortion (THD) limiter. For applications flexibility, example software drivers are available for Linux and other OS platforms. Finally, 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 optimise the signal level of microphone’s input signals. The MAX98089 is also designed to eliminate the external discrete components found in most competitive solutions. It integrates a Class H stereo headphone amplifier with a dual-mode charge pump. This architecture has been designed to eliminate 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 a level of performance for today's devices but without the need for discrete amplifiers.
