Features • Low power consumption • Shutdown function • No added processing delay • Differential inputs and outputs • Automatic calibration • Adjustable 6 - 48dB gain • Excellent RF immunity • Space-saving 36–bump micro SMD package Description The LMV1089 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 LMV1089 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 calibrated system. Part of the Powerwise™ family of energy efficient solutions, the LMV1089 consumes only 1.1mA of supply current providing superior performance over DSP solutions consuming greater than ten times the power. A quick calibration during the manufacturing test process of the product containing the LMV1089 compensates the entire microphone system. This calibration compensates for mismatch in microphone gain and frequency response, as well as acoustical path variances. The LMV1089 stores the calibration coefficients in the on-chip EEPROM. The calibration is initiated by an I 2C command or by a logic pin control. 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), (f = 1kHz) 37dB ■  Supply Voltage 2.7V to 5.5V ■  Supply Current 1.1mA (typ) ■  Standby Current 0.7µA (typ) ■  Signal-to-Noise Ratio (A-weighted) 65dB (typ) ■  Total Harmonic Distortion + Noise 0.1% (typ) ■  PSRR (17Hz) 96dB (typ) Applications • Headset and Boom microphones • Mobile handsets and two-way radios • Bluetooth and other powered headsets • Hand-held voice microphones • Equalized stereo microphone preamplifier

Also Recommended LMV1088▲ Single Ended Output LMV1090▲ Improved Performance Typical application page 2 MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image Typical application page 2	Block Diagram click for larger image LMV1089 application gain budget
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LMV1089 Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Capability	1659 Kbytes	6-Jul-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1832: Application Note 1832 LMV1089 Noise Suppression Microphone Amplifier Demo Board User`s Guide	2467 Kbytes	17-Jun-09

More Application Notes

Title		Size	Date	Other Language
	AN-1832: Application Note 1832 LMV1089 Noise Suppression Microphone Amplifier Demo Board User`s Guide	2467 Kbytes	17-Jun-09

Design Tools

Title	Size	Date
LMV1088 Software (Windows XP/2000) allows control of the LMV1088 device and its operating modes
LMV1088 Online Noise Reduction Demo
"LMV1088 Evaluation Manual, Gerber and Software"

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMV1089RL	CMOS7	0	18406	0	0	1089000	4	309006723
LMV1089RLX	CMOS7	0	18406	0	0	1089000	4	309006723
LMV1089VY	CMOS7	0	18406	0	0	1089000	4	309006723
LMV1089VYX	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.

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