MAX9718DETB+T

Audio Amplifiers Overview

The MAX9718DETB+T is a single-channel, low-cost audio power amplifier from Analog Devices/Maxim Integrated. It operates on a single supply voltage ranging from 2.7V to 5.5V and delivers 1.4W of continuous average power into a 4Ω load with less than 1% THD+N at a +5V supply. The device utilizes a bridge-tied load (BTL) architecture for high-quality amplification while minimizing external component count. It features differential inputs for improved noise rejection and includes internal fixed gain options or adjustable gain configurations.

Audio Amplifiers Feature Summary

• Bridge-tied load (BTL) architecture minimizes external components while delivering high-power audio amplification.
• Differential input structure enhances noise rejection and provides common-mode rejection capabilities.
• Integrated click-and-pop suppression circuitry reduces audible artifacts during startup and shutdown sequences.
• Low-power shutdown mode disables bias generators and reduces quiescent current consumption significantly.

Audio Amplifiers Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the specific suffix 'DETB' corresponds to the 10-pin TDFN package variant when sourcing. Confirm RoHS compliance status as indicated by the '+' designation in the ordering information. Ensure the design supports the required thermal dissipation for the TDFN-EP package given the exposed pad requirement for heat sinking.

Audio Amplifiers Selection Notes

Select this model for mono audio applications requiring high efficiency and minimal board space. The BTL configuration eliminates the need for large DC-blocking capacitors found in single-ended designs. Consider the fixed gain version if external resistors are undesirable, or the adjustable variant for flexible gain control via software-controlled potentiometers.

Audio Amplifiers Part Context

This component belongs to the MAX9718/MAX9719 family of low-cost, mono/stereo audio power amplifiers. The MAX9718 series specifically targets portable devices with internal speakers. It serves as a pin-compatible upgrade to the LM4895, offering improved performance characteristics within the same footprint constraints for mobile and handheld electronics.

Audio Amplifiers Replacement Considerations

The MAX9718 is explicitly documented as a pin-compatible upgrade to the LM4895. Designers replacing legacy parts should verify that the LM4895 specifications meet the new requirements for PSRR and click-and-pop suppression provided by the MAX9718 series.