LM4850LDX

Audio Amplifiers Overview

The LM4850LDX is a stereo audio power amplifier manufactured by National Semiconductor. It delivers 0.3W of output power per channel into an 8-ohm load. The device operates in Class AB topology and supports a supply voltage range from 2.7V to 5.5V. It utilizes a 14-pin LLP package with a pitch of 0.80 mm. The amplifier features integrated DC volume control and input multiplexing capabilities for system flexibility.

Audio Amplifiers Feature Summary

• Integrated digital volume control allowing precise gain adjustment
• Input multiplexer enables selection between multiple audio sources
• Cap-less headphone drive capability reduces external component count
• Class AB operation provides high fidelity audio reproduction

Audio Amplifiers Applications

• Portable media players requiring low-power stereo amplification
• Mobile phones and smartphones with integrated audio functions
• Digital voice recorders and MP3 players
• Small form-factor consumer electronics with limited PCB space

Audio Amplifiers Procurement Notes

Verify the manufacturer origin as National Semiconductor, noting that Texas Instruments acquired the company. Confirm the specific suffix 'LDX' indicates the tape-and-reel packaging variant. Ensure the part matches the LLP-14 package dimensions and pinout configuration specified in the official datasheet before integration.

Audio Amplifiers Selection Notes

Select this component when a stereo amplifier with built-in volume control and input switching is required. It is suitable for applications needing cap-less headphone outputs to minimize bill of materials. Consider the 2.7V to 5.5V operating range for compatibility with single-cell lithium-ion or dual-cell NiMH battery systems.

Audio Amplifiers Part Context

This part belongs to the LM4850 series of audio amplifiers designed for portable consumer electronics. The series emphasizes simplicity and performance in small packages. National Semiconductor developed these devices to address the needs of mobile audio applications where space and power efficiency are critical constraints.

Audio Amplifiers Replacement Considerations

Check for LM4850LD/NOPB as a potential lead-free alternative within the same family. Verify pin-to-pin compatibility and electrical specifications against current inventory parts. Consult Texas Instruments documentation for any updated revisions or recommended replacements for discontinued National Semiconductor products.