MAX9702

19-3608; Rev 0; 6/05 www.DataSheet4U.com 1.8W, Filterless, Stereo, Class D Audio Power Amplifier and DirectDrive Stereo Headphone Amplifier General Description The MAX9702 combines a highly efficient Class D speaker amplifier with a high-linearity Class AB headphone amplifier. This ensures maximum battery life in speaker mode and maximum performance in headphone mode. The MAX9702 delivers up to 1.8W per channel into an 8 Ω load from a 5V power supply. Maxim’s 2nd-generation, spread-spectrum modulation scheme renders the traditional Class D output filter unnecessary. The MAX9702 speaker amplifier offers two modulation schemes: a fixed-frequency (FFM) mode and a spreadspectrum (SSM) mode that reduces EMI-radiated emissions. The MAX9702 speaker amplifier features a fully differential architecture, full-bridged (BTL) output, and comprehensive click-and-pop suppression. The MAX9702 speaker amplifier features high 75dB PSRR, low 0.07% THD+N, and SNR in excess of 97dB. Shortcircuit and thermal-overload protection prevent the device from being damaged during a fault condition. The headphone amplifier uses Maxim’s patented DirectDriveTM architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. A high 80dB PSRR and low 0.02% THD+N ensures clean, low-distortion amplification of the audio signal. An I2C interface sets the speaker and headphone gain, mono, stereo, and...