- No loss of speech intelligibility
- Low power consumption
- Shutdown function
- No processing delay is added
- Differential output
- Adjustable gain from 12 to 54 dB
- Excellent RF immunity
- Available in a 25-ball micro SMD package
illustrate
The LMV1091 is a fully analog dual differential input, differential output, microphone array amplifier designed to reduce background noise in voice communication applications while providing superior speech intelligibility.
The LMV1091 retains the microphone within 4 cm of near-field voice signal, while rejecting microphones with far-field noise exceeding 50cm. Far-field rejection of up to 20dB has the potential to match micropohones in a properly configured and 0.5 dB ±.
Part of the PowerWise™ family of energy-saving solutions, the LMV1091 consumes only 600μA of supply current, consuming more than 10 times more power than DSP solutions to deliver superior performance.
Dual microphone inputs and processed signal outputs to provide excellent poor immunity to interference. Microphones with internal low-noise bias supplies are biased.
Main specifications
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Far-field noise suppression electronics*
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34 dB (typical)
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SNRIË
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26 dB (typical)
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Supply voltage
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2.7V to 5.5V
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Supply current
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600μA (typical)
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Standby current
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0.1μA (typical)
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Signal-to-noise ratio (audio and speech bands)
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65 dB (typical)
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Total harmonic distortion + noise
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0.1% (typical)
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PSRR (at 217Hz)
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99 dB (typical)
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* At f = 1kHzFFNSË
apply
- Mobile phone headphones
- Mobile and handheld two-way radios
- Bluetooth and other powered headphones
- Handheld voice microphone
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