PGA2505IDB

Overview

The PGA2505IDB is a digital-controlled microphone preamplifier from Texas Instruments, housed in a 24-SSOP package. It operates on a single supply voltage ranging from 4.75 V to 5.25 V. The device features one channel with an available gain adjustment range of 9 dB to 60 dB. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.0006%, an input offset voltage (Vos) of 1 mV, and a maximum input resistance of 9.2 kOhms. It supports surface mount installation and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Digital control interface for precise gain adjustment
• Low distortion and low noise performance for high-fidelity audio
• Single-channel mono microphone preamplification

Applications

• Professional audio recording equipment
• Broadcasting studio microphones
• High-end consumer audio interfaces

Procurement Notes

Verify the specific package variant, as the IDB suffix denotes SSOP-24. Confirm that the application circuit matches the required 4.75 V to 5.25 V supply range. Ensure thermal management aligns with the -40°C to +85°C operating limits. Cross-reference the datasheet for SPI or I2C control line requirements to guarantee compatibility with the host controller.

Selection Notes

Select this component when a single-channel, digitally adjustable microphone preamp is required. It is suitable for applications demanding low THD+N and precise gain control via digital signals. Consider the 24-SSOP footprint for PCB layout constraints. Evaluate if the 9 dB to 60 dB gain range meets the specific sensitivity requirements of the connected microphone source.

Part Context

Part of the PGA2505 series, designed for professional audio signal chains. The SoundPlus family focuses on high-performance analog front ends with digital integration. This specific unit serves as a bridge between analog microphone outputs and digital processing systems, ensuring signal integrity through low-noise amplification.

Replacement Considerations

Check for PGA2505IDBR for tape-and-reel packaging alternatives. Verify functional equivalence with other PGA250x variants if pinout compatibility is critical.