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Product Detailed Parameters
- Description：MIC MEMS ANALOG OMNI -42DB
- 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：-42dB ±3dB @ 94dB SPL
- S/N Ratio：60dB
- Impedance：-
- Voltage Range：1.6 V ~ 3.6 V
- Current - Supply：80 µA
- Port Location：Top
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.148" L x 0.116" W (3.76mm x 2.95mm)
- Height (Max)：0.047" (1.20mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：2 V
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Overview
The CMM-3729AT-42308-TR is an analog MEMS microphone from the Same Sky CMM series, designed for surface-mount applications. It features a rectangular footprint measuring 3.76 mm in length and 2.24 mm in width, with a maximum height of 1.25 mm. The device operates on a supply voltage ranging from 1.6 V to 3.6 V and draws a typical current of 160 µA. It provides an analog output with a sensitivity of -42 dB and a signal-to-noise ratio of 60 dBA. The frequency response spans from 100 Hz to 10 kHz, supporting omnidirectional sound pickup.
Feature Summary
- Omnidirectional acoustic design for uniform sound capture
- Analog output interface compatible with standard audio processing circuits
- Low power consumption suitable for battery-operated devices
Applications
- Consumer electronics audio input systems
- Voice recognition modules
- Portable recording devices
Procurement Notes
Verify the specific suffix against official documentation to confirm pinout orientation and sensitivity tolerance. Ensure the ordering part number matches the required package variant. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement specifications.
Selection Notes
Select this component when a compact analog MEMS microphone is required for space-constrained designs. The 3.76 x 2.24 mm size offers a balance between acoustic performance and board real estate. Consider the 160 µA current draw for power budget calculations in portable applications requiring continuous operation.
Part Context
This part belongs to the Same Sky CMM series of MEMS microphones, which includes various sizes and output types. The CMM-3729 designation indicates a specific physical dimension within the family. The 'AT' suffix typically denotes analog output and top-port configuration, distinguishing it from digital or bottom-port variants in the same product line.
Replacement Considerations
Direct substitutes include other CMM-3729 series variants such as CMM-3729AB-38108-TR or CMM-3729AT-42316-TR, provided the electrical parameters and mechanical dimensions are compatible with the existing design constraints.
