The LMV1089 is a dual input, Clarisound Far Field Noise Suppression Microphone Amplifier with Automatic Calibration Capability
The LMV1089 is a fully analog dual differential input, differential output microphone array amplifier designed to reduce background acoustic noise while preserving near‑field voice signals. It offers up to 20 dB far‑field noise rejection and consumes only 1.1 mA typical supply current, making it more efficient than many DSP solutions.
Key features include automatic calibration stored in on‑chip EEPROM, adjustable gain of 6‑36 dB, differential outputs for excellent noise immunity, and a space‑saving 36‑bump micro‑SMD package. Typical applications are headsets, two‑way radios, Bluetooth headsets, and equalized stereo microphone preamplifiers.
| Supply current (typical) | 1.1 mA |
|---|---|
| Signal‑to‑Noise Ratio (A‑weighted, typ) | 65 dB |
| Gain range | 6 dB – 36 dB |
| Input impedance (typ) | 155 Ω |
| Output impedance (typ) | 300 Ω |
The typical supply current is 1.1 mA.
It can reject far‑field acoustic noise by up to 20 dB when properly calibrated.
The amplifier offers an adjustable gain from 6 dB to 36 dB.
It is supplied in a 36‑bump micro SMD package.