MAXIM MAX9875 Low RF Susceptibility Mono Audio Subsystem with DirectDrive Headphone Amplifier handbook
MAX9875 is a high-efficiency Class D audio power amplifier with a built-in stereo AB-class capacitor-less DirectDrive headphone amplifier. This amplifier uses Maxim's third-generation filterless Class D amplifier technology with active emissions limiting technology to provide Class AB performance with Class D efficiency. The MAX9875 can provide up to 725mW of power from a 3.7V supply to an 8Ω load with an efficiency of 87%, extending 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 AB-class headphone amplifier in the MAX9875 uses Maxim's DirectDrive architecture, which 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 uses 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.
Brand: MAXIM
File format: PDF
Size: 491 KB
MD5 Checksum: 8FEAF038ABB86FF1F9C1D07E8F8D6D4F
Publication date: 07 May, 2012
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