LMV10xx Analog Far-Field Noise Suppression Solutions
Industry's first analog, dual-input microphone amp with far-field noise suppression
Less than 1/10th to 1/20th the power of digital solutions
Superior, natural voice clarity
85 dB PSRR at 1 KHz, 60 dB SNR, 1% THD+N
Rapid system integration; no voice processing software code
I2C control with 4 operating modes
On-chip calibration circuitry and EEPROM
Tiny 3.5 x 3.5 mm micro SMDxt package
The LMV1088, LMV1089, LMV1090, and LMV1091 are fully analog dual-input microphone array amplifiers that reduce background acoustic noise, while delivering superb speech. They are ideal for a variety of voice communication applications including handsets, powered headsets, and mobile radios.
LMV1088: Single ended output + auto calibration LMV1089: Differential output + shutdown pin + auto calibration LMV1090: Differential output + shutdown pin LMV1091: Pin-programmable version of the LMV1090 LMV1099: Uplink and Downlink Noise Suppression
These products are easy to integrate into any handset or headset design. No extensive design or software changes are required. Part of the PowerWise® family of energy-efficient solutions, the chips just 1 mA or 1/10th to 1/20th the power of comparable digital DSP and CPU software-based systems.
The devices have two differential input microphone amplifier channels, microphone calibration circuitry, plus far-field noise suppression (FFNS) processing circuitry. The calibration circuitry compensates for gain and frequency response variations of the microphones, eliminating the need to use expensive matched microphone sets. Calibration data is stored on-chip in EEPROM memory.
In addition the LMV1099 enhances downlink signal to noise ratio, improving audibility in noisy environments.
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