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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：20 Hz ~ 10 kHz
- Sensitivity：-38dB ±1dB
- S/N Ratio：64dB
- Impedance：170 Ohms
- Voltage Range：1.5 V ~ 3.6 V
- Current - Supply：175 µA
- Port Location：Top
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.108" L x 0.073" W (2.75mm x 1.85mm)
- Height (Max)：0.039" (1.00mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：1.8 V
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Overview
The CMM-2718AT-3817NC-TR is an analog MEMS microphone manufactured by Same Sky. It features omnidirectional directivity with a top port location and rectangular shape. The device operates within a supply voltage range of 1.6 V to 3.6 V, with a typical rating of 1.8 V. Key electrical parameters include a sensitivity of -38 dB ±3 dB at 94 dB SPL, an impedance of 170 Ohms, and a signal-to-noise ratio of 64 dBA. The frequency response spans from 100 Hz to 10 kHz, and the current consumption is 75 µA. Physical dimensions are 2.75 mm in length, 1.85 mm in width, and 0.95 mm in height.
Feature Summary
- Omnidirectional acoustic design for uniform sound capture
- Top port configuration for specific mounting orientations
- Low power consumption suitable for battery-operated devices
Applications
- Noise canceling applications
- Voice recognition systems
- Consumer electronic audio input
Procurement Notes
Verify the specific suffix NC against the manufacturer's latest datasheet to confirm package type and tape/reel specifications. Ensure the selected variant matches the required port orientation (top vs. bottom) and sensitivity tolerance for the target application. Cross-reference the DigiKey part number 102-5093-1-ND or 102-5093-2-ND for accurate ordering details.
Selection Notes
Select this component when a top-port omnidirectional MEMS microphone is required. Compare the 170 Ohm impedance and 64 dBA SNR against other models like the CMM-2718AB series which may offer bottom ports or different sensitivities. Confirm that the 2.75mm x 1.85mm footprint fits the PCB layout constraints.
Part Context
This model belongs to the CMM series of analog MEMS microphones from Same Sky. It is designed as a surface-mount device (SMT) utilizing silicon technology. The series includes variants with different port locations and sensitivities, such as the CMM-2718AB and CMM-2718AT families, catering to diverse audio interface requirements.
Replacement Considerations
The CMM-2718AB-38308-TR is a related variant within the same family but features a bottom port instead of a top port. Verify if the port orientation change affects the mechanical assembly before substitution.
