PGA2311U/1KG4

Audio Special Purpose Overview

The Texas Instruments PGA2311U/1KG4 is a discontinued stereo audio volume control integrated circuit housed in a 16-SOIC package. It operates on a single supply voltage ranging from ±4.75V to ±5.25V and supports an operating temperature range of -40°C to +85°C. The device features a digital SPI interface for gain adjustment, providing a dynamic range of 31.5dB to -95.5dB. Designed for high-fidelity applications, it maintains a total harmonic distortion plus noise (THD+N) of 0.0002% with a load impedance of 100 kOhms. This automotive-grade component serves as a precise solution for multi-channel audio systems requiring low-noise volume management.

Audio Special Purpose Feature Summary

• Dual-channel stereo architecture with SPI digital control interface
• Ultra-low THD+N of 0.0002% for high-fidelity audio reproduction
• Automotive grade qualification (-40°C to +85°C operating range)
• Wide dynamic range spanning 31.5dB to -95.5dB

Audio Special Purpose Applications

• Professional audio mixing consoles
• High-end musical instrument amplifiers
• Automotive infotainment systems
• Home theater surround sound processors

Audio Special Purpose Procurement Notes

The PGA2311U/1KG4 is officially discontinued by Texas Instruments and no longer carried by major distributors such as DigiKey. Verification of current availability requires checking authorized secondary market suppliers or alternative distributors like Mouser for similar legacy stock. Engineers should confirm the exact suffix 'G4' denotes RoHS compliance and verify that the base product PGA2311 remains the functional reference for any cross-referencing efforts.

Audio Special Purpose Selection Notes

Designers requiring this specific component must account for its discontinued status when planning long-term production runs. The PGA2311U/1K variant may be available through other channels, offering identical electrical specifications but potentially different packaging quantities. Ensure that the 16-SOIC footprint matches the PCB layout constraints, as the physical dimensions are fixed at 0.295 inches width. Verify that the system power supply strictly adheres to the ±4.75V to ±5.25V limit to prevent performance degradation.