PGA4311U/1K

Audio Special Purpose Overview

The PGA4311U/1K is a stereo audio volume control integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of ±4.75V to 5.25V and features a total harmonic distortion plus noise (THD+N) of 0.0002%. The device supports an audio load impedance of 100 kOhms and utilizes a Single-Ended SPI interface for digital control. It is housed in a 28-pin SOIC package and is designed for surface mount installation. The component functions as a dual-channel stereo volume controller suitable for professional audio applications.

Audio Special Purpose Feature Summary

• Dual-channel stereo volume control with 0.0002% THD+N
• Single-Ended SPI digital interface for gain adjustment
• Operates on ±4.75V to 5.25V power supply
• Available in 28-pin SOIC package

Audio Special Purpose Applications

• Professional audio mixing consoles
• Home theater processors
• High-fidelity audio amplifiers

Audio Special Purpose Procurement Notes

Verify the specific suffix '1K' against the official datasheet to confirm packaging details, such as reel quantity or tape specifications. Ensure the ordering part number matches the exact package type and temperature rating required for the design. Cross-reference the manufacturer's latest documentation to confirm current production status and any potential product change notifications affecting this specific variant.

Audio Special Purpose Selection Notes

Select the PGA4311U/1K when a low-distortion stereo volume control with digital SPI interface is required. Confirm that the system power supply can provide the necessary ±4.75V to 5.25V rails. Verify that the PCB layout accommodates the 28-pin SOIC footprint and that the host microcontroller supports the Single-Ended SPI protocol for channel gain programming.

Audio Special Purpose Part Context

This component belongs to the PGA23xx/PGA43xx family of audio volume controls from Texas Instruments. These devices are engineered for high-performance analog signal processing in digital audio systems. The PGA4311 specifically offers stereo functionality with precise digital attenuation capabilities, distinguishing it from mono variants or those with different interface requirements within the same product line.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's datasheet for recommended pin-compatible alternatives or functional equivalents within the same series before considering cross-brand replacements.