EA-23178-078

Overview

The Knowles EA-23178-078 is an analog electret condenser microphone designed for omnidirectional sound pickup. It features a frequency response range of 100 Hz to 4.8 kHz and a sensitivity of -61 dB ±3 dB at 74 dB SPL. The component measures 5.56 mm in length, 3.98 mm in width, and 2.21 mm in depth. It utilizes solder pads for termination and operates with a current rating of 50 uA.

Feature Summary

• Omnidirectional acoustic design for uniform sound capture from all directions
• Electret condenser technology providing stable analog audio output
• Compact surface-mount form factor suitable for space-constrained electronic assemblies

Applications

• Consumer electronics audio input modules
• Voice recognition systems requiring omnidirectional pickup
• Portable communication devices

Procurement Notes

Verify the specific suffix and revision level against the manufacturer's latest documentation to ensure compatibility with intended circuit designs. Confirm that the solder pad termination style aligns with the printed circuit board layout requirements. Cross-reference the sensitivity tolerance specifications with system noise floor calculations to guarantee adequate signal-to-noise performance in the final application environment.

Selection Notes

Choose this component when an omnidirectional response is required within a limited frequency bandwidth up to 4.8 kHz. The fixed sensitivity and low current consumption make it suitable for battery-powered applications where power efficiency is critical. Ensure the mechanical dimensions fit within the designated housing constraints and that the solder pad interface matches the manufacturing process capabilities.

Part Context

This microphone belongs to the broader category of analog electret condenser microphones manufactured by Knowles. It is distinguished by its specific dimensional profile and frequency response characteristics tailored for general-purpose voice capture rather than high-fidelity audio recording. The part represents a standard solution for basic audio sensing needs in compact consumer devices.

Replacement Considerations

Consult official substitution lists for compatible omnidirectional electret microphones with similar sensitivity and dimensional constraints. Verify that any alternative part maintains the same polarity and impedance characteristics to prevent circuit modification.