PGA2311U/1K

Audio Special Purpose Overview

The PGA2311U/1K is a stereo audio volume control integrated circuit manufactured by Texas Instruments. It operates on a single 5V supply, with voltage specifications ranging from 4.75 V to 5.25 V. The device features a total harmonic distortion plus noise (THD+N) of 0.0002% and supports a load impedance of 100 kOhms. Designed for surface mount applications, it is housed in a 16-SOIC package. The component functions within an operating temperature range of -40°C to +85°C and utilizes an SPI interface for digital control.

Audio Special Purpose Feature Summary

• Stereo configuration with 2-channel support
• Ultra-low THD+N of 0.0002%
• Digital volume control via SPI interface
• Single 5V power supply operation

Audio Special Purpose Applications

• Audio equipment
• Musical instruments

Audio Special Purpose Procurement Notes

Verify the specific suffix '1K' indicates the reel packaging format when sourcing. Confirm that the SOIC-16 package dimensions match the target PCB footprint. Ensure the design accommodates the specified humidity sensitivity requirements during storage and assembly processes.

Audio Special Purpose Selection Notes

Select this component for stereo applications requiring precise digital attenuation. Verify compatibility with the system's SPI bus protocol. Ensure the 100 kOhm input impedance aligns with the preceding stage's output characteristics. Check that the 5V supply rail meets the minimum 4.75 V requirement for proper operation.

Audio Special Purpose Part Context

This part belongs to the PGA2311 series of audio volume controls. It is distinct from the PGA4311 series, which offers four channels and a different SOIC-28 package. The PGA2311U/1K specifically denotes the tape and reel variant of the standard PGA2311U device.

Audio Special Purpose Replacement Considerations

PGA2311U is the tube-packaged equivalent of the same functional device.