The LMV1012 is an audio amplifier series for small form factor electret microphones. This 2-wire portfolio is designed to replace the JFET amplifier currently being used. The LMV1012 series is ideally suited for applications requiring high signal integrity in the presence of ambient or RF noise, such as in cellular communications. The LMV1012 audio amplifiers are guaranteed to operate over a 2.2V to 5.0V supply voltage range with fixed gains of 7.8 dB, 15.6 dB, 20.9 dB, and 23.8 dB. The devices offer excellent THD, gain accuracy and temperature stability as compared to a JFET microphone. The LMV1012 series enables a two-pin electret microphone solution, which provides direct pin-to-pin compatibility with the existing JFET market. The devices are offered in extremely thin space saving 4-bump micro SMD packages. The LMV1012XP is designed for 1.0 mm canisters and thicker ECM canisters. These extremely miniature packages are designed for electret con- denser microphones (ECM) form factor.
The LMV1012 series is a pre‑amplified audio IC designed for small‑form‑factor electret microphones. It replaces traditional JFET amplifiers and offers high signal integrity in noisy environments such as cellular phones, headsets, and automotive accessories. The devices operate from 2.2 V to 5.0 V and are available with fixed gains of 7.8 dB, 15.6 dB, 20.9 dB, and 23.8 dB.
The series is offered in ultra‑thin 4‑bump micro SMD packages (Ultra‑Thin, Thin, and standard) and includes detailed electrical characteristics, absolute maximum ratings, and typical performance graphs. Ordering information, package dimensions, and compliance notes are also provided.
| Supply voltage range | 2.2 V to 5.0 V |
|---|---|
| Available gains | 7.8 dB, 15.6 dB, 20.9 dB, 23.8 dB |
| Supply current (typical) | <180 pA |
| Signal‑to‑noise ratio | 60 dB (A‑weighted) |
| Output voltage noise | -89 dBV (A‑weighted) |
| Total harmonic distortion | 0.09 % |
| Operating temperature range | -40 °C to 85 °C |
| Input capacitance | 2 pF |
| Input impedance | >1000 GΩ |
| Package type | 4‑bump micro SMD |
The LMV1012 operates from 2.2 V up to 5.0 V.
Four fixed gain options are offered: 7.8 dB, 15.6 dB, 20.9 dB, and 23.8 dB.
Typical supply current is less than 180 pA.
The device is offered in 4‑bump micro SMD packages, including ultra‑thin and thin variants.