Update: 30 September, 2023
The MAX9729 is a stereo DirectDrive™ headphone amplifier that features bass boost, volume control, an input mux, and an I2C/SMBus™-compatible serial interface. This makes the MAX9729 ideal for portable audio applica- tions where space is at a premium and performance is essential. The MAX9729 operates from a single 1.8V to 3.6V, and uses Maxim’s patented† DirectDrive architec- ture, eliminating the need for large DC-blocking capaci- tors. The headphone amplifiers deliver 52mW into a 32Ω load, feature low 0.03% THD+N, and high 90dB PSRR. Maxim’s industry-leading click-and-pop sup- pression circuitry reduces audible transients during power and shutdown cycles. The BassMax feature boosts the bass response of the amplifier, improving audio reproduction for low-end headphones. The integrated volume control features 32 discrete volume levels along with a ramping function to ensure smooth transitions during shutdown cycles and input selection. The MAX9729’s eight programmable maximum gain settings allow for a wide range of input signal levels. A 3:1 multiplexer/mixer allows the selection and summation of multiple stereo input signal sources. The MAX9729 also includes a dedicated BEEP input with independent attenuation control. BassMax, volume control, gain settings, and input selection are controlled using the I2C/SMBus-compatible serial interface. A low- power, 5µA shutdown mode is controlled through an external logic input or the serial interface. The MAX9729 consumes o
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MD5 Checksum: 658439B44F7D8644152878CAD6BF721F
Publication date: 09 May, 2012
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PDF Link: MAXIM MAX9729 Manual PDF