MAX9875 Datasheet | Maxim Integrated

19-4536; Rev 0; 3/09 Low RF Susceptibility, Mono Audio Subsystem with Direct Drive Headphone Amplifier .. KIT ATION EVALU E L B A AVAIL General Description Features - Low Emissions, Filterless Class D Amplifier Achieves Better than 10d B Margin Under EN55022 Class B Limits - Low RF Susceptibility Design Rejects TDMA Noise from GSM Radios - Input Mixer with User-Defined Input Mode - 725m W Speaker Output (RSPK = 8Ω, PVDD = 3.7V) - 53m W Headphone Output (RHP = 16Ω, VDD = 3.7V) - Low 0.05% THD+N at 1k Hz (Class D Power Amplifier) - Low 0.016% THD+N at 1k Hz (Headphone Amplifier) - 87% Efficiency (RSPK = 8Ω, POUT = 750m W) - High Speaker Amplifier PSRR (72d B at 217Hz) - High Headphone Amplifier PSRR (84d B at 217Hz) - I2C Control - Hardware and Software Shutdown Mode - Click-and-Pop Suppression - Current-Limit and Thermal Protection - Available in a Space-Saving, 2.5mm x 2.0mm WLP Package The MAX9875 bines a high-efficiency Class D audio power amplifier with a stereo Class AB capacitorless Direct Drive® 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 725m W from a 3.7V supply into an 8Ω load with 87% efficiency to extend battery life. The filterless modulation scheme bined 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 Direct Drive architecture, that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, space, and ponent height. The device utilizes a user-defined input architecture, three preamplifier gain settings, an input mixer, volume control, prehensive click-and-pop suppression, and I2C control. The MAX9875...