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LMV1091TM/NOPB
Dual Input, Far Field Noise Suppression Microphone Amplifier 25-DSBGA -40 to 85
LMV1091
www.ti.com SNAS481C –OCTOBER 2009–REVISED MAY 2013
LMV1091 Dual Input, Far Field Noise Suppression Microphone Amplifier
Checkfor Samples: LMV1091
1FEATURES DESCRIPTIONThe LMV1091isa fully analog dual differential input,
No Lossof Voice Intelligibility differential output, microphone array amplifier
• Low Power Consumption designedto reduce background acoustic noise, while
Shutdown Function delivering superb speech clarity in voice
communication applications.
• No added Processing Delay Differential Outputs The LMV1091 preserves near-field voice signals
within 4cmof the microphones while rejecting far-field
• Adjustable12- 54dB Gain acoustic noise greater than 50cm from the
• Excellent RF Immunity microphones. Up to 20dB of far-field rejectionis
Availableina 25–Bump DSBGA Package possibleina properly configured and using ±0.5dB
matched micropohones.
APPLICATIONS Partof the Powerwise™ familyof energy efficient
Mobile Headset solutions, the LMV1091 consumes only 600μA of
supply current providing superior performance over
• Mobile and Handheld Two-way Radios DSP solutions consuming greater than ten times the
• Bluetooth and Other Powered Headsets power.
Hand-held Voice Microphones The dual microphone inputs and the processed signal
output are differential to provide excellent noise
KEY SPECIFICATIONS immunity. The microphones are biased with an
internal low-noise bias supply.
• Far Field Noise Suppression Electrical (FFNSEf= 1kHz): 34dB (typ) SNRIE: 26dB (typ) Supply Voltage: 2.7Vto 5.5V 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)
