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Product Detailed Parameters
- Description：MIC CMOS/MEMS ANALOG LGA
- Series：-
- Mfr：Cirrus Logic Inc.
- Package：Tape & Reel (TR)
- Type：-
- Output Type：-
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Overview
The WM7138IMSE/RV is an analog MEMS microphone manufactured by Cirrus Logic. It features a bottom port design and omnidirectional acoustic response. The device operates at a supply voltage of 3.7 V with a current consumption of 200 uA. Key electrical specifications include a sensitivity of -38 dB with a tolerance of 1 dB, and a signal-to-noise ratio (SNR) of 65 dB. The frequency range spans from 62 Hz to 12.5 kHz. It utilizes an LGA-6 package with dimensions of 3.76 mm in length, 3 mm in width, and 1.1 mm in depth. The component supports surface mount installation and functions within a temperature range of -40 C to +100 C.
Feature Summary
- Analog output type for direct interface with audio processing circuits
- Bottom port configuration suitable for specific acoustic enclosure designs
- Omnidirectional pickup pattern for uniform sound capture from all directions
Applications
- Mobile communication devices requiring compact analog microphones
- Portable consumer electronics with limited power budgets
- Voice recognition systems utilizing analog front-end processing
Procurement Notes
Verify the exact suffix and revision level against official Cirrus Logic documentation before procurement. Confirm availability status as distribution channels may vary. Ensure compatibility with existing PCB footprints and acoustic requirements. Check for moisture sensitivity levels and storage conditions if the component has been held in inventory. Validate that the analog output characteristics meet the specific input requirements of the target audio codec or amplifier.
Selection Notes
Select this component when an analog MEMS microphone with low power consumption is required. The bottom port design offers flexibility in mechanical assembly compared to top-port alternatives. Consider the 65 dB SNR and -38 dB sensitivity for applications demanding moderate audio fidelity. The LGA-6 package provides a small form factor suitable for space-constrained portable devices. Ensure the host system can accommodate the 3.7 V operating voltage and 200 uA current draw.
Part Context
The WM7138IMSE/RV belongs to the Cirrus Logic WM7132 series of MEMS microphones. This family focuses on providing high-performance audio sensing solutions for mobile and portable markets. The series includes both analog and digital variants, allowing designers to choose based on their system architecture. Cirrus Logic integrates advanced silicon mic technology to deliver consistent performance across various environmental conditions.
Replacement Considerations
The WM7132PIMSE/RV is a documented substitute within the same product family. Verify pinout compatibility and acoustic specifications before substitution. Other models in the WM7132 series may offer different port configurations or output types.
