LM4818MX

Audio Amplifiers Overview

The LM4818MX is a single-channel Class-AB audio power amplifier manufactured by Texas Instruments, formerly National Semiconductor. It delivers 350 mW of output power into a 16 Ohm load with a total harmonic distortion plus noise of 1%. The device operates on a single supply voltage ranging from 2 V to 5.5 V and draws a typical quiescent current of 1.5 mA. It features a single-ended input and differential output configuration. The component is housed in an SOIC-8 surface-mount package and supports operation across a temperature range of -40°C to +85°C.

Audio Amplifiers Feature Summary

• Single-ended input to differential output conversion capability
• Low quiescent current consumption for battery efficiency
• Class-AB topology for improved audio fidelity

Audio Amplifiers Applications

• Portable digital radios
• Headphone amplifiers
• Consumer audio circuits

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the suffix MX indicates the SOIC-8 package variant. Ensure the NOPB designation is present if lead-free compliance is required. Cross-reference the specific datasheet revision to confirm pinout compatibility with existing designs.

Audio Amplifiers Selection Notes

Select this component when a low-power, single-supply mono amplifier is needed for driving low-impedance loads like headphones or small speakers. The differential output simplifies layout compared to bridge-tied loads. Consider the 16 Ohm load specification and 2V minimum supply voltage during system design to ensure adequate performance margins.

Audio Amplifiers Part Context

This part belongs to the Boomer series of audio amplifiers from Texas Instruments. It represents the legacy National Semiconductor product line now managed under TI's portfolio. The LM4818MX is designed for cost-sensitive consumer electronics requiring compact packaging and simple external component requirements.

Audio Amplifiers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.