LM3189 is a monolithic integrated circuit that provides all the functions of a comprehensive FM IF system, including a three-stage FM IF amplifier, limiter, quadrature FM detector, and audio amplifier. It features low distortion, high sensitivity, programmable recovered audio level, and other advanced characteristics.
The LM3189N is a monolithic integrated circuit that provides a complete FM IF system, including a three‑stage FM IF amplifier/limiter, level detectors, a doubly balanced quadrature FM detector, and an audio amplifier with optional muting (squelch) circuit. It operates from a dual‑in‑line package and supports supply voltages from +8.5 V to +16 V.
The document lists absolute maximum ratings, electrical characteristics, test circuits, schematic diagrams, physical dimensions, and a life‑support policy notice. It also includes pin‑out information and typical performance graphs for designers.
| Supply voltage range | +8.5 V to +16 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Quiescent circuit current | 31 mA (typical) |
| Limiting sensitivity | 12 pV typ at –3 dB point |
| Total harmonic distortion | 0.1 % typ (double‑tuned coil) |
| Signal‑to‑noise ratio (S+N/N) | 65 dB typ |
The LM3189N operates with a supply voltage range of +8.5 V to +16 V.
It can operate from –40 °C up to +85 °C.
The typical limiting sensitivity is 12 pV at the –3 dB point.
Typical THD is 0.1 % when using a double‑tuned coil.