The LMV1091TMX/NOPB 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 LMV1091TMX/NOPB 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 micropohones.
Part of the Powerwise family of energy efficient solutions, the LMV1091TMX/NOPB 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.
Feature
- No Loss of Voice Intelligibility
- Low Power Consumption
- Shutdown Function
- No added Processing Delay
- Differential Outputs
- Adjustable 12 - 54dB Gain
- Excellent RF Immunity
- Available in a 25–Bump DSBGA Package
- Far Field Noise Suppression Electrical (FFNSE at f = 1kHz): 34dB (typ)
- SNRIE: 26dB (typ)
- Supply Voltage: 2.7V to 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)
