PGA2311UA/1K

Audio Special Purpose Overview

The PGA2311UA/1K is a dual-channel stereo audio volume control integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of ±4.75V to ±5.25V and supports gain adjustments from +31.5dB to -95.5dB. The device features a total harmonic distortion plus noise (THD+N) of 0.0002% and a gain-bandwidth product of 10MHz. Designed for surface-mount applications, it utilizes an SPI interface for digital control and is housed in a 16-SOIC package with a width of 7.50mm. The component functions as a precision analog volume controller suitable for high-fidelity audio systems.

Audio Special Purpose Feature Summary

• Dual-channel stereo architecture with SPI digital interface
• Gain range of +31.5dB to -95.5dB with 0.5dB step resolution
• Low distortion performance: THD+N of 0.0002%
• Operates on single ±5V supply with 100kΩ load impedance

Audio Special Purpose Applications

• Professional audio mixing consoles
• High-fidelity home theater receivers
• Musical instrument amplifiers

Audio Special Purpose Procurement Notes

Verify the ordering suffix '/1K' indicates tape-and-reel packaging containing 1,000 units per reel. Confirm the 'U' designation corresponds to the SOIC-16 package variant. Ensure compatibility with standard SPI protocols for volume control commands. Check moisture sensitivity level (MSL 2) requirements for storage and handling procedures prior to assembly.

Audio Special Purpose Selection Notes

Select this component when a dual-channel solution is required for stereo signal paths. Compare against the PGA2311P if through-hole mounting is necessary instead of surface mount. Consider the PGA4311U for applications requiring four independent channels rather than two. Verify that the ±5V supply constraint aligns with the system power design.

Audio Special Purpose Part Context

This part belongs to the PGA2311 family of audio volume controls. It shares core specifications with the PGA2311U but differs in packaging quantity and type. The PGA2310 serves as a related single-channel counterpart within the same product line. These devices are designed to replace traditional potentiometers in digital audio environments.

Audio Special Purpose Replacement Considerations

The NCS2211DR2G is listed as a similar alternative by distributors. Verify functional equivalence regarding channel count and interface compatibility before substitution.