DFG-30445-000

Overview

The Knowles DFG-30445-000 is an analog unidirectional boom microphone designed for voice capture applications. It operates within a frequency range of 100 Hz to 10 kHz and requires a supply voltage between 1.3 V and 3 V, with a typical supply current of 50 µA. The device features a sensitivity of -69 dB ±4 dB at 74 dB SPL and utilizes solder pads for termination. This component belongs to the DFG series, which employs directional technology derived from the omni-directional FG series.

Feature Summary

• Unidirectional acoustic design for focused voice pickup
• Analog output signal suitable for standard audio processing circuits
• Low power consumption profile optimized for portable devices

Applications

• Boom microphone assemblies in communication headsets
• Voice capture in mobile handheld devices
• General audio input systems requiring directional sensitivity

Procurement Notes

Verify the specific ordering suffix and package configuration against the official datasheet before procurement. Confirm that the target application supports the required 1.3 V to 3 V operating voltage range. Ensure the PCB layout accommodates the specified solder pad termination type. Check for any scheduled obsolescence notices from the manufacturer regarding this part number.

Selection Notes

Select this component when a compact, low-power analog microphone with directional characteristics is required. It is suitable for designs where space constraints necessitate a small form factor and where power efficiency is critical. Ensure the host system provides the necessary bias voltage and can interface with the analog output level without excessive noise.

Part Context

This microphone is part of the DFG series by Knowles, representing a directional variant based on the company's established omni-directional FG series technology. The DFG series positions the front sound port on the surface opposite the mounting side to enhance directionality. This specific model is intended for integration into boom-style audio accessories.

Replacement Considerations

Check for direct substitutes within the DFG or FG series that match the electrical specifications and pinout. Verify compatibility with existing mechanical mounts and acoustic ports. Consult the manufacturer for recommended alternatives if this part is discontinued.