TM-30228-B12

Overview

The Knowles TM-30228-B12 is an analog electret condenser microphone featuring omnidirectional polar characteristics. It operates within a frequency range of 100 Hz to 6.25 kHz and requires an operating supply voltage of 1.3 V. The device exhibits a sensitivity of -55 dB ±2 dB at 74 dB SPL, with an impedance of 4.4 kOhms and a current rating of 50 uA. Physical dimensions include a length of 0.141 inches and a depth of 1.7 mm, utilizing solder pads for mounting.

Feature Summary

• Omnidirectional acoustic response for uniform sound capture from all directions
• Electret condenser technology providing analog audio output
• Low power consumption suitable for battery-operated portable devices

Applications

• Portable consumer electronics audio input
• Voice recognition systems requiring omnidirectional pickup
• General-purpose analog microphone circuits

Procurement Notes

Verify component authenticity through authorized Knowles distributors or certified suppliers. Ensure the received parts match the specified part number and RoHS compliance status. Confirm that solder pad compatibility aligns with your PCB design requirements before finalizing procurement orders.

Selection Notes

Select this component when omnidirectional coverage is required for analog signal processing. Consider the 1.3 V operating voltage and 50 uA current draw for power budgeting. Evaluate the -55 dB sensitivity against ambient noise levels in the target application environment.

Part Context

This model belongs to the Knowles electret condenser microphone family, designed for compact electronic assemblies. It serves as a standard audio transducer solution where space constraints and low power consumption are critical design parameters for modern portable devices.

Replacement Considerations

Cross-reference with other omnidirectional electret microphones having similar sensitivity and impedance specifications. Verify pinout and dimensional compatibility if substituting with alternative manufacturers' components.

FAQ

What is the polar pattern of the TM-30228-B12?

The TM-30228-B12 features an omnidirectional polar pattern, allowing it to capture sound equally from all directions.

What is the operating supply voltage for this microphone?

The device requires an operating supply voltage of 1.3 V.