Bottom Port Analog Microphone

The WM7331 is a low-profile silicon analog microphone offering high Signal-to-Noise Ratio (SNR) and low power consumption. The device incorporates Cirrus Logic’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The compact integration of transducer and internal circuitry on a single die enables implementation with an extremely small package. The WM7331 offers tight tolerance on the microphone sensitivity, giving reduced variation between parts and removing the need for in-line production calibration of part-to-part microphone variations.

Product Categories

Mobile Audio Devices, Wearables, Headsets

Features

  • High SNR (63 dB)
  • Low variation in sensitivity
    • ±1 dB tolerance
  • Low current consumption (55µA)
  • Analog output
  • Bottom Port LGA package
  • 2.5mm x 1.6mm x 0.9mm package size
  • 1.6 to 3.6 V supply

Parametric Specifications

Not Recommended for New Designs
Recommended Replacement: CS7331

Technical Documents

WM7331 6336 MS3 M Rev1 Schematic and Layout

Jul 11, 2016, v1.0 : 467 Kb

WM7331 Product Datasheet

May 26, 2016, v3.2 : 779 Kb

1171 EV2 REV2 Example Configurations

Jul 1, 2014, v1.1 : 148 Kb

1700 EV1 REV1 Customer User Manual

Jul 1, 2014, v1.2 : 818 Kb

1171 EV2 REV2 Schematic and Layout

Aug 1, 2010, v1.0 : 375 Kb

Design Resources

WAN_0284 General Design Considerations for MEMS Microphones

Jan 6, 2016, WAN0284 rev 1.2 : 506 Kb

WAN_0285 Microphone Power Gating

Nov 5, 2015, WAN0285 rev 1.1 : 508 Kb

WAN_0238 TDMA Noise Filtering

Nov 5, 2015, WAN0238 rev 1.1 : 338 Kb

WAN_0273 MEMS MIC Assembly and Handling Guidelines

Nov 5, 2015, WAN0273 rev 1.3 : 624 Kb

WAN_0290 An Introduction to MEMS Microphone Specifications

Jun 15, 2015, WAN0290 rev 1.0 : 538 Kb

Software and Tools

1700-EV1 Setup

n/a : 21112 Kb

WM7000 Setup

n/a : 1433 Kb

Applications

More

Comprehensive Solutions