MAX98088: Stereo FLEXSOUND audio codec improves loudspeaker performance and uses little power

Leveraging Maxim's FLEXSOUND audio processor, the MAX98088 provides an extensive toolkit for improving loudspeaker playback performance and voice transmission. The easy-to-use evaluation (EV) kit and user interface (click here for picture of GUI) simplify evaluation of the FLEXSOUND tools: 5-band parametric EQ, automatic level control (ALC), speaker excursion limiter, speaker power limiter, and speaker distortion (THD) limiter. These tools enable system designers to easily optimize audio performance while limiting distortion and power at the output. Microphone automatic gain control (AGC) and a noise gate optimize the signal level of microphone input signals to make the best use of the ADC dynamic range and improve voice conversion.

The integrated headphone amplifiers feature Maxim's dual-mode charge pump and Class H output stage to maximize efficiency. This architecture eliminates the need for large output capacitors and ensures click-/pop-free operation during turn-on, turn-off, and volume changes. Ground sense reduces the output noise caused by ground-return current. The stereo Class D speaker amplifiers feature Maxim's newest generation of ultra-low-EMI, high-efficiency, and filterless technology. These amplifiers output 950mW into 8ohm speakers while maintaining 87% efficiency. These capabilities save battery life, reduce external components, and provide ample sound-pressure level for mobile products.