Features • No loss of voice intelligibility • No added processing delay • Low power consumption • Differential outputs • Excellent RF immunity • Adjustable 12 - 54dB gain • Shutdown function • Space-saving 16–bump micro SMD package Description The LMV1090 is a fully analog dual differential input, differential output, microphone array amplifier designed to reduce background acoustic noise, while delivering superb speech clarity in voice communication applications. The LMV1090 preserves near-field voice signals within 4cm of the microphones while rejecting far-field acoustic noise greater than 50cm from the microphones. Up to 20dB of far-field rejection is possible in a properly configured and using ±0.5dB matched microphones. Part of the Powerwise™ family of energy efficient solutions, the LMV1090 consumes only 600μA of supply current providing superior performance over DSP solutions consuming greater than ten times the power. The dual microphone inputs and the processed signal output are differential to provide excellent noise immunity. The microphones are biased with an internal low-noise bias supply. Key Specification Far Field Noise Suppression Electrical * 34dB (typ) SNRIE 26dB (typ) Supply current 600μA (typ) Standby current 0.1μA (typ) Signal-to-Noise Ratio (Voice band) 65dB (typ) Total Harmonic Distortion + Noise 0.1% (typ) PSRR (217Hz) 99dB (typ)    *FFNSE at f = 1kHz Applications • Mobile headset • Mobile and handheld two-way radios • Bluetooth and other powered headsets • Hand-held voice microphones • Cell phones

Also Recommended LMV1088▲ Improved Performance LMV1089▲ Improved Performance LMV1091▲ Pin Programmable Version Of The LMV1090 MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image LMV1089 application gain budget
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LMV1090 Dual Input, Far Field Noise Suppression Microphone Amplifier	865 Kbytes	29-Oct-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1948: Application Note 1948 LMV1090 Noise Suppression Microphone Amplifier Evaluation Kit User`s Guide	4181 Kbytes	1-Jul-09	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LMV1090TL/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 477	$3.99 each at 100+ pcs	reel of 250
LMV1090TLX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$3.99 each at 100+ pcs	reel of 3000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Design Tools

Title	Size	Date
LMV1090 Software (Windows) Controls the LMV1090 and Its Operating Modes	259 Kbytes	15-Jun-2009

CAD Symbols and Models Download LMV1090 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMV1090TL	CMOS7	0	18406	0	0	1089000	4	309006723
LMV1090TLX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.