LMV1090
Dual input microphone preamplifier with noise suppression with I2C interface
LMV1090
- 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
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)
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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.
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMV1090 Dual Input, Far Field Noise Suppression Microphone Amplifier datasheet (Rev. I) | 02 May 2013 | |
| EVM User's guide | LMV1089 Noise Supp Microphne Amp Demo Brd UG (Rev. B) | 01 May 2013 | ||
| User guide | LMV1090 Noise Suppression Microphone Amplifier Evaluation Kit (Rev. B) | 01 May 2013 |
Design & development
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PSPICE-FOR-TI — PSpice® for TI design and simulation tool
| Package | Pins | Download |
|---|---|---|
| DSBGA (YZR) | 16 | View options |
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