MAX9875

19-4536; Rev 0; 3/09 Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier www.datasheet4u.com KIT ATION EVALU E L B A AVAIL General Description Features ♦ Low Emissions, Filterless Class D Amplifier Achieves Better than 10dB Margin Under EN55022 Class B Limits ♦ Low RF Susceptibility Design Rejects TDMA Noise from GSM Radios ♦ Input Mixer with User-Defined Input Mode ♦ 725mW Speaker Output (RSPK = 8Ω, PVDD = 3.7V) ♦ 53mW Headphone Output (RHP = 16Ω, VDD = 3.7V) ♦ Low 0.05% THD+N at 1kHz (Class D Power Amplifier) ♦ Low 0.016% THD+N at 1kHz (Headphone Amplifier) ♦ 87% Efficiency (RSPK = 8Ω, POUT = 750mW) ♦ High Speaker Amplifier PSRR (72dB at 217Hz) ♦ High Headphone Amplifier PSRR (84dB 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 MAX9875 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 8Ω 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 filt...