Features • Low power consumption • No added processing delay • Automatic Calibration • Space-saving 36 Bump micro SMD package • Up to 20dB SNRI 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. 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) Applications • Mobile handsets • Mobile and handheld two-way radios • Bluetooth and other powered headsets • Hand-held voice microphones • Portable public address systems

Also Recommended LMV1089▲ Differential Output + Shutdown Pin LMV1090▲ Improved Performance simplified application MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image simplified application	Connection Diagram click for larger image Pinout
Typical Performance click for larger image Idd vs Vdd.vsd

Datasheets

Title		Size	Date	Other Language
	LMV1088 Dual Input, Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Ability	1463 Kbytes	26-Feb-09	日本語

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LMV1088RL/NOPB RoHS Status		Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 500 DIGIKEY Worldwide 357 FUTURE Worldwide 500 NEWARK Americas 83	$9.95 each at 100+ pcs	reel of 250
LMV1088RLX/NOPB RoHS Status		Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$9.95 each at 100+ pcs	reel of 1000

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
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"

CAD Symbols and Models Download LMV1088 CAD Symbols

Models N/A