1FEATURES
23• 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 DSBGA Package

APPLICATIONS
• Mobile Headset
• Mobile and Handheld Two-Way Radios
• Bluetooth and Other Powered Headsets
• Hand-held Voice Microphones
• Cell Phones

KEY SPECIFICATIONS
• Far Field Noise Suppression Electrical (FFNSE
at f = 1kHz): 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)

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.