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Product Detailed Parameters
- Description：MIC MEMS ANALOG OMNI -38DB
- Series：CMM
- Mfr：Same Sky (Formerly CUI Devices)
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MEMS (Silicon)
- Output Type：Analog
- Direction：Omnidirectional
- Frequency Range：100 Hz ~ 10 kHz
- Sensitivity：-38dB ±1dB @ 94dB SPL
- S/N Ratio：65dB
- Impedance：400 Ohms
- Voltage Range：1.6 V ~ 3.6 V
- Current - Supply：75 µA
- Port Location：Bottom
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.108" L x 0.073" W (2.75mm x 1.85mm)
- Height (Max)：0.037" (0.95mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：2 V
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Overview
The CMM-2718AB-38108-TR is an analog MEMS microphone from Same Sky, designed for omnidirectional sound capture. It operates within a frequency range of 100 Hz to 10 kHz and features a sensitivity of -38 dB ±3 dB at 94 dB SPL. The device supports a supply voltage range of 1.6 V to 3.6 V with a typical current consumption of 75 µA. It utilizes a bottom port configuration and solder pad termination. The physical dimensions are 2.75 mm in length, 1.85 mm in width, and a maximum height of 0.95 mm.
Feature Summary
- Omnidirectional acoustic design for uniform sound pickup
- Low power consumption suitable for battery-operated devices
- Compact surface-mount package for space-constrained applications
Applications
- Voice recognition systems
- Consumer audio recording devices
- Smart home voice assistants
Procurement Notes
Verify the specific suffix '108' against the manufacturer's datasheet to confirm the exact sensitivity tolerance and impedance characteristics, as these parameters vary across the CMM-2718 series. Ensure the procurement documentation matches the required operating temperature range and packaging format (Reel or Cut Tape) specified for the production environment.
Selection Notes
Select this component when a low-profile, analog output microphone is required for compact electronics. The bottom-port design facilitates placement near sound sources on PCBs. Compare the 75 µA current draw against other variants if power efficiency is critical, and verify that the analog interface aligns with the target ADC input requirements.
Part Context
This part belongs to the Same Sky CMM series of MEMS microphones. It shares the same 2.75 x 1.85 mm footprint with other variants like the CMM-2718AT-42308-TR but differs in port orientation and sensitivity. The series provides options for both top and bottom ports to accommodate diverse mechanical constraints.
Replacement Considerations
CMM-2718AB-38308-TR: Similar specifications with potentially different sensitivity tolerance. CMM-2718AT-42308-TR: Top-port variant requiring mechanical re-evaluation.
