Part # MAX9877 datasheet

Part Manufacturer: Maxim


Part Description: MAX9877 DS

Part Details:

19-4076; Rev 0; 7/08 EVALUATION KIT AVAILABLE Low RF Susceptibility, Mono Audio Subsystem with DirectDrive Headphone Amplifier MAX9877 General Description Features The MAX9877 combines a high-efficiency Class D Low Emissions, Filterless Class D Amplifier audio power amplifier with a stereo Class AB capacitor- Achieves Better than 10dB Margin Under EN55022 less DirectDrive® headphone amplifier. Maxim s 3rd Class B Limits generation, filterless Class D amplifier with active emis- Low RF Susceptibility Design Rejects TDMA sions limiting technology provides Class AB perfor- Noise from GSM Radios mance with Class D efficiency. Input Mixer with User-Defined Input Mode 725mW Speaker Output (R The MAX9877 delivers up to 725mW from a 3.7V supply SPK = 8, PVDD = 3.7V) into an 8 load with 87% efficiency to extend battery life. 53mW Headphone Output (RHP = 16, VDD = 3.7V) The filterless modulation scheme combined with active Low 0.05% THD+N at 1kHz (Class D Power emissions limiting circuitry and spread-spectrum modu- Amplifier) lation greatly reduces EMI while eliminating the need for Low 0.016% THD+N at 1kHz (Headphone Amplifier) output filtering used in traditional Class D devices. 87% Efficiency (RSPK = 8, POUT = 750mW) The stereo Class AB headphone amplifier in the 1.6 Analog Switch for Speaker Amplifier Bypass MAX9877 uses Maxim s patented DirectDrive architec- High Speaker Amplifier PSRR (72dB at 217Hz) ture, that produces a ground-referenced output from a High Headphone Amplifier PSRR (84dB at 217Hz) single supply, eliminating the need for large DC-blocking I2C Control capacitors, saving cost, space, and component height. Hardware and Software Shutdown Mode The device utilizes a user-defined input architecture, Click-and-Pop Suppression three preamplifier gain settings, an input mixer, volume Current-Limit and Thermal Protection control, comprehensive click-and-pop suppression, and Available in a Space-Saving, 2.5mm x 2.0mm WLP I2C control. A bypass mode feature disables the integrat- Package ed Class D amplifier and utilizes an internal DPST switchto allow an external amplifier to drive the speaker that isconnected at the outputs of the MAX9877. Ordering Information

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MAX9877.pdf Datasheet