MAX9776EBX+TG45

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MAX9776EBX+TG45 is an audio linear amplifier IC, specifically designed for smartphone and other portable applications. It offers superior performance, with a low-noise voltage feed-forward (VFF) amplifier topology, gain control and programmable output voltage for high-performance audio processing in mobile devices. The MAX9776EBX+TG45 amplifier helps reduce board space and power consumption while providing ultra-low distortion (THD+N) of less than 0.04% and a supplied gain control of -6 dB to +6 dB. The use of a VFF amplifier eliminates the need for external components, thus reducing power dissipation, cost and board space.

The MAX9776EBX+TG45 is comprised of two low power, single-channel audio linear amplifiers with integrated fractional-N PLLs, a programmable gain +6 dB to -6 dB, noise-filtering power supply voltage, and a selectable output voltage between 0V and 2.1V. Each amplifier includes a low-noise amplifier of up to 135 dB signal-to-noise ratio (SNR) and 0.04% distortion (THD+N). The IC’s on-chip PLLs provide low operating noise and a fully programmable audio band (from 10 kHz to 20 kHz) to the output of each amplifier.

The MAX9776EBX+TG45 audio linear amplifier is suitable for a wide range of applications, including mobile phones and tablet PCs, media players, and other portable audio devices. In addition, it can be used for active noise cancellation, Dolby/DTS decoding, and other audio signal processing applications. The integrated fractional-N PLLs enable oscillator tuning, making the MAX9776EBX+TG45 suitable for high-fidelity audio applications.

The MAX9776EBX+TG45 uses a VFF amplifier topology to reduce power consumption, create fewer high-frequency harmonics, and produce better performances with high-efficiency power supplies. Additionally, the IC features selectable gain control and programmable output voltage, allowing for dynamic gain adjustments without external resistors and black reference voltage level optimization. Also included is a noise filtering LDO regulator, providing an ultra-low noise power supply to the amplifier.

The MAX9776EBX+TG45 also includes an Automatic Output Control (AOC) feature, which automatically adjusts the gain level and output voltage to ensure a clean, distortion-free audio reproduction with reduced power consumption. Additionally, the IC includes a built-in thermal protection feature in the form of a thermal monitoring circuit, which can detect temperature levels greater than 100 °C and automatically shut down the amplifier to protect the device from damage.

In summary, the MAX9776EBX+TG45 is an advanced audio power amplifier IC designed for use in mobile applications. Its high-efficiency, low-noise, and ultra-low distortion characteristics make it a great choice for high-fidelity audio applications. With its integrated fractional-N PLLs and selectable gain control and programmable output voltage, it offers maximum flexibility and performance.

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