GA38-30774-000

Microphones Overview

The Knowles GA38-30774-000 is an electret condenser microphone designed for analog audio signal capture. It features an omnidirectional polar pattern and a rectangular form factor with dimensions of 4.00mm x 2.00mm. The component operates at a voltage rating of 1.3V and presents an impedance of 4.4 kOhms. Its frequency response spans from 20 Hz to 20 kHz, with a sensitivity of -53.5dB ±3dB referenced at 74dB SPL. The device utilizes solder pads for board mounting and includes a bottom port location.

Microphones Feature Summary

• Omnidirectional acoustic pickup pattern for uniform sound reception
• Electret condenser transducer technology for analog output
• Compact rectangular surface-mount footprint

Microphones Applications

• Portable electronic devices requiring compact audio input
• Consumer electronics with limited internal volume
• General-purpose analog microphone circuits

Microphones Procurement Notes

Verify the current part status as sources indicate this model may be obsolete. Confirm availability through authorized distributors or surplus channels. Ensure compatibility with existing 1.3V bias requirements and 4.4 kOhm impedance loads in the target circuit design before procurement.

Microphones Selection Notes

Select this component when a low-profile, omnidirectional electret microphone is required for analog applications. Consider the specific 1.3V operating voltage and 4.4 kOhm impedance constraints. Evaluate the -53.5dB sensitivity against system noise floor requirements. Note that the bottom port orientation must align with the acoustic enclosure design.

Microphones Part Context

This microphone belongs to the GA series of electret condenser microphones manufactured by Knowles. These components are typically engineered for integration into space-constrained consumer electronics. The GA series emphasizes small form factors while maintaining standard analog audio interface characteristics for broad compatibility with existing audio processing hardware.

Microphones Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status indicated by some sources, direct replacements should be verified against mechanical dimensions (4.00mm x 2.00mm), electrical parameters (1.3V, 4.4 kOhm), and acoustic performance (-53.5dB sensitivity).