EK-28585-C77

Microphones Overview

The EK-28585-C77 is a subminiature electret condenser microphone manufactured by Knowles. It features an omnidirectional polar pattern and delivers analog output signals. The device operates within a frequency range of 50 Hz to 5.3 kHz and supports supply voltages between 0.9 V and 10 V. It exhibits a sensitivity of -53 dB ± 2 dB at 74 dB SPL with a load resistance of 4.4 kOhms. The physical dimensions are compact, measuring 0.219 inches in length and 0.157 inches in width.

Microphones Feature Summary

• Subminiature form factor suitable for space-constrained designs
• Omnidirectional acoustic response for uniform sound capture
• Analog output signal generation

Microphones Applications

• Hearing aids
• Medical diagnostic equipment
• Specialty audio recording devices

Microphones Procurement Notes

Verify the specific suffix C77 against the official Knowles datasheet to confirm exact mechanical and electrical tolerances. Ensure compatibility with existing biasing circuits given the 0.9 V to 10 V operating range. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement specifications.

Microphones Selection Notes

Select this component when miniaturization is critical alongside reliable analog audio capture. The wide supply voltage range offers flexibility in power management design. Consider the 5.3 kHz upper frequency limit for applications not requiring high-fidelity wideband audio reproduction.

Microphones Part Context

This model belongs to Knowles' EK series of subminiature electret microphones. The series is engineered for high reliability in medical and hearing health sectors. These components utilize advanced miniaturization techniques to maintain performance in extremely small packages.

Microphones Replacement Considerations

Consult official Knowles documentation for direct cross-references. Verify that any substitute maintains the same omnidirectional pattern and analog output type. Mechanical footprint compatibility must be confirmed independently.