LMV1088 - Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ability from the PowerWise® Family
Datasheet Packaging Samples & Pricing Design Tools Application Notes Knowledge Base

Features
Low power consumption
No added processing delay
Automatic Calibration
Space-saving 36 Bump micro SMD package
Up to 20dB SNRI

Key Specification


(3.3V supply, unless otherwise specified)

Supply voltage

2.7V to 5.5V

Supply current

1mA (typ)

Signal to noise ratio (A-weighted)

60dB (typ)

Total harmonic distortion

0.1% (typ)

Noise cancellation

20dB (typ)

PSRR

85dB (typ)

General Description


The LMV1088 amplifies near-field voice signals within 4cm of the microphones while rejecting far-field acoustic noise greater than 0.5m from the microphones. More...


Applications


Mobile handsets
Mobile and handheld two-way radios
Bluetooth and other powered headsets
Hand-held voice microphones
Portable public address systems
  Typical Application
click for larger image

simplified application

ParametersValues
THD 0.1 %
SNR 60 dB
PSRR 85 dB
Supply Min 2.7 Volt
Supply Max 5.5 Volt
User Supply 3.3 Volt
Temperature Min -40 deg C
Temperature Max +85 deg C
PowerWise Yes


Typical Performance


click for larger image

Idd vs Vdd.vsd
  Also Recommended
LMV1089Differential Output + Shutdown Pin
LMV1090Improved Performance
Additional Resources
Design Tools

Application Notes


Connection Diagram


click for larger image

Pinout

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMV1088 Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ability 1463
Kbytes
26-Feb-09 Download
LMV1088 Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ability (Japanese)
997 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LMV1088RLMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now
100+$9.95reel
of
250
XYTT
I ZA1
6 weeksN/A
LMV1088RLXMICRO SMDXT36NOPB1260RoHS N/A Full productionN/A
 
Buy Now
100+$9.95reel
of
1000
XYTT
I ZA1
6 weeksN/A

General Description


The LMV1088 amplifies near-field voice signals within 4cm of the microphones while rejecting far-field acoustic noise greater than 0.5m from the microphones. Up to 20dB of far-field rejection is possible in a properly configured and calibrated system.

Part of the Powerwise® family of energy efficient solutions, the LMV1088 consumes 1mA of supply current while providing superior performance to DSP solutions consuming over 10 times the power.

A fast calibration during the manufacturing test process allows the LMV1088 to compensate the entire microphone system. This calibration includes mismatch in microphone gain and frequency response, as well as acoustical path variances. The LMV1088 stores the calibration coefficients in on-board EEPROM. The calibration is initiated by I2C command or by pin control.

The dual microphone inputs are differential to provide excellent noise immunity. The microphones are biased with an internal low-noise bias supply.

Design Tools


TitleSize in Kbytes Date Click link below to Download    
LMV1088 Software (Windows XP/2000) allows control of the LMV1088 device and its operating modes     View    
LMV1088 Online Noise Reduction Demo     View    
"LMV1088 Evaluation Manual, Gerber and Software"     View    

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1832: Application Note 1832 LMV1089 Noise Suppression Microphone Amplifier Demo Board User`s Guide 2467
Kbytes
17-Jun-09 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]