MAX9875 具有低RF干擾敏感度的單聲道音頻子系統(tǒng)，帶有DirectDrive耳機放大器

數據資料

The MAX9875 combines a high-efficiency Class D audio power amplifier with a stereo Class AB capacitorless DirectDrive? headphone amplifier. Maxim’s 3rd generation, filterless Class D amplifier with active emissions limiting technology provides Class AB performance with Class D efficiency.

The MAX9875 delivers up to 725mW from a 3.7V supply into an 8&937; load with 87% efficiency to extend battery life. The filterless modulation scheme combined with active emissions limiting circuitry and spread-spectrum modulation greatly reduces EMI while eliminating the need for output filtering used in traditional Class D devices.

The stereo Class AB headphone amplifier in the MAX9875 uses Maxim’s patented DirectDrive architecture, that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and component height.

The device utilizes a user-defined input architecture, three preamplifier gain settings, an input mixer, volume control, comprehensive click-and-pop suppression, and I²C control.

The MAX9875 is available in a thermally efficient, space-saving 20-bump WLP package.

關鍵特性

應用/使用

蜂窩電話
便攜式多媒體播放器
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MAX9875 pdf datasheet (Low RF Susceptibility Mono Audio Subsystem)