LMV1051_16 Datasheet, PDF (1/6 Pages) Texas Instruments – PRODUCT BRIEF Processor for Dual Microphone Adaptive Noise Cancelling With Wind Noise Alert

Not Recommended for New Designs
LMV1051
www.ti.com
SNAS508A – SEPTEMBER 2010 – REVISED MAY 2013
PRODUCT BRIEF Processor for Dual Microphone Adaptive Noise Cancelling With Wind
Noise Alert
Check for Samples: LMV1051
FEATURES
1
•2 Superior Noise Cancellation
– Dual Mic Technology
– Active Directional Pattern
– Up to 30dB Peak Noise Rejection of
Stationary and Non-Stationary Noise
Sources
– No Distortion of Desired Signal
– Flat Frequency Response
• Wind Noise Alert and Protection
– Automatically Reduces Wind Noise by ≈ 20
dB (vs. Directional Mic)
– Wind Noise Alert can be Used to Further
Reduce Impact of Wind on Desired Signal
• Ultra-Low Power Consumption
– 210 μA (Typical) Including Mic Bias
– Battery-Free Operation in Wired Headsets
• Compatible with Standard ECM Interfaces
– 2-Wire or 3-Wire Interface
– Powered from Mic Bias Supply
• Complete Signal Processing Solution
– No Software Required
– Enables a Fully Integrated Mic Module
• Zero-Latency Signal Processing
• Noise Cancelling or Omni-Directional Output
• Better EMI Noise Rejection than ECM
• Supports Telephony Bandwidth
• Small Size 3 x 3 mm
APPLICATIONS
• Wired Headset
• Webcams
• Cellular or Cordless Handsets
DESCRIPTION
The LMV1051-LLP is an ultra-low power signal
processor that processes the signals from 2 ECM or
MEMS microphones to create an adaptive beam
forming noise reduction system.
The LMV1051-LLP processor is intended to be
integrated with microphones (ECMs or MEMS). By
using a proprietary TI algorithm, the processor
extracts a clean intelligible signal from noisy
environments through the use of an adaptive
directional pattern. The resulting solution can reduce
noise by up to 30 dB, resulting in a significant
improvement to the signal-to-noise ratio (SNR). The
signal processing does not introduce artifacts into the
talker’s voice. The desired signal is unmodified, which
improves intelligibility and speech recognition
accuracy.
The LMV1051-LLP is designed to replace a standard
ECM using a two-wire or three-wire interface. The
entire module, including the processing IC, is
powered from the mic bias supply. The resulting
system uses less power than an individual ECM
giving the end-product designer the ability to upgrade
current designs without modifying the existing circuit.
The result is an easy-to-use, low cost microphone
alternative, providing superior noise reduction for end
users.
Notice: This document is not a full datasheet. For
more information regarding this product or to
order samples please contact your local TI sales
office or visit http://www.ti.com/support/dir.html
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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