MAX9718BEUB+

Audio Amplifiers Overview

The MAX9718BEUB+ is a mono audio power amplifier from the Maxim Integrated MAX9718/MAX9719 family. It operates on a single supply voltage ranging from 2.7V to 5.5V and delivers 1.4W of continuous average power per channel into a 4Ω load with less than 1% THD+N. The device features a differential input structure for improved noise rejection, an internally fixed gain of 0dB, and a low-power shutdown mode that reduces quiescent current to under 100nA. It utilizes a bridge-tied load (BTL) architecture and includes comprehensive click-and-pop suppression circuitry.

Audio Amplifiers Feature Summary

• Features a differential input structure that enhances noise rejection and provides common-mode rejection capabilities.
• Incorporates industry-leading click-and-pop suppression circuitry to minimize audible artifacts during startup and shutdown sequences.
• Includes a low-power shutdown mode that disables bias generators and significantly reduces quiescent current consumption.

Audio Amplifiers Applications

• Mobile Phones
• PDAs
• Portable Devices

Audio Amplifiers Procurement Notes

Verify the specific suffix 'EUB+' corresponds to the 10-pin μMAX package with an exposed pad when sourcing replacements. Confirm the internal gain setting is 0dB as indicated by the 'B' designation in the ordering information. Ensure the component meets the -40°C to +85°C extended temperature range requirements for your application environment.

Audio Amplifiers Selection Notes

Select this component for portable audio designs requiring a mono BTL amplifier with minimal external components. The fixed 0dB gain configuration simplifies the schematic by eliminating external feedback resistors. Consider the 10-pin μMAX package for applications where board space is constrained but through-hole or standard surface-mount compatibility is preferred over UCSP packaging.

Audio Amplifiers Part Context

This part belongs to the MAX9718/MAX9719 series of low-cost, differential input audio power amplifiers designed for portable devices. The MAX9718 variant specifically serves as a mono amplifier, whereas the MAX9719 is a dual-channel stereo version. Both share similar electrical characteristics and are pin-compatible upgrades to older LM4895 designs.

Audio Amplifiers Replacement Considerations

The datasheet notes that the MAX9718 is pin-compatible with the LM4895. Specific substitute part numbers beyond this general compatibility are not provided in the source material.