Maxim Class D/G amplifier reduces power by 5x for always-on speakers

Article By : Maxim Integrated Products Inc.

Maxim's MAX98396 Class D/G speaker amplifier features a quiescent power consumption nearly five times lower than similar amplifiers.

Maxim Integrated Products Inc.’s MAX98396 Class D/G speaker amplifier features the industry’s lowest noise and lowest quiescent power consumption, which is nearly five times lower power than similar amplifiers. The 20V digital input audio power amplifier offers 12.7mW of quiescent power to meet and exceed the industry’s power compliance regulations, which support the always-on feature in portable Bluetooth and smart speakers. The MAX98396’s low 15.5uVrms noise floor is 50% lower than the closest competitor, allowing speaker placement in near-silent locations.

The MAX98396 is the newest addition to Maxim Integrated’s portfolio of Class D/G amplifiers, offering the industry’s lowest power, lowest noise and highest thermal efficiency demanded by battery powered Bluetooth and always-on smart speakers. The industry-leading power efficiency allows the speaker to be driven higher and longer before reaching the thermal limit. As well, the MAX98396 is ultrasound ready with 45kHz of bandwidth and a dedicated data path. This feature, combined with artificial intelligence (AI) software and ultrasound, enables touchless gesture sensing, presence detection and proximity sensing.

“As consumers embrace voice assistance in everyday life, speakers are proliferating throughout the connected home and new use cases are driving the demand for higher audio performance and artificial intelligence-enabled smart speakers,” said Peter Cooney, SAR Insight & Consulting. “And as these modern devices continue to shrink in size, thermal management is becoming even more critical.”

“The MAX98396 Class D/G amplifier was designed to meet the needs of next-generation smart and wireless speakers,” said Kevin Ko, business manager of Mobile Audio Solutions at Maxim Integrated. “The high-resolution audio-compatible speaker amplifier features ultra-low noise performance, making it well-suited for placement bed side. Upgraded, ultrasound-ready features enable the newest trend of contactless smart speakers.”

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