LM48822TLX/NOPB

Audio Amplifiers Overview

The LM48822TLX/NOPB is a stereo headphone amplifier manufactured by Texas Instruments, formerly National Semiconductor. It features ground-referenced outputs, ultra-high power supply rejection ratio (PSRR), and ultra-low noise characteristics. The device delivers 35mW per channel into typical headphone loads. Key functional blocks include common-mode sense circuitry for output monitoring and an I2C interface for digital volume control. It operates within a specified voltage range suitable for portable audio applications.

Audio Amplifiers Feature Summary

• Ground-referenced output architecture eliminates the need for large coupling capacitors.
• Ultra-high PSRR ensures minimal power supply noise interference in audio signals.
• Integrated I2C volume control allows for precise digital gain adjustment.
• Common-mode sense capability provides feedback for output protection and monitoring.

Audio Amplifiers Applications

• Portable media players requiring high-fidelity audio reproduction
• Mobile phones with integrated headphone jacks
• Digital audio players with limited power supply headroom

Audio Amplifiers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix TLX indicates tape-and-reel packaging if required by assembly processes. Ensure the NOPB suffix confirms lead-free and RoHS compliance status according to current environmental regulations. Cross-reference the datasheet revision date to ensure compatibility with design specifications.

Audio Amplifiers Selection Notes

Select this component when ground-referenced outputs are preferred over bootstrapped configurations to reduce external component count. The I2C interface is necessary for systems requiring programmable volume control without additional analog potentiometers. Verify that the required output power aligns with the 35mW/channel specification under the target load impedance and supply voltage conditions.

Audio Amplifiers Part Context

This part belongs to the LM48822 family of Boomer audio amplifiers. It is designed specifically for battery-powered consumer electronics where space and power efficiency are critical constraints. The integration of digital controls and low-noise performance distinguishes it from standard analog-only headphone drivers in the same product line.

Audio Amplifiers Replacement Considerations

LM48822TL/NOPB is a documented equivalent variant within the same family. Verify pinout compatibility and electrical parameter equivalence before substitution. Other members of the LM4882x series may offer different package options or feature sets but require careful validation of functional differences.