The LM3189N is a monolithic integrated circuit that provides all the functions of a comprehensive FM IF system
The LM3189N is a monolithic integrated circuit that provides a complete FM IF system, including a three‑stage amplifier/limiter, quadrature FM detector, and audio amplifier with optional muting. It operates from a supply voltage range of +8.5 V to +16 V and supports ambient temperatures from –40 °C to +85 °C.
The document includes absolute maximum ratings, electrical characteristics, test circuits, schematic diagrams, physical dimensions, and a life‑support policy notice. It is intended for designers of high‑fidelity FM receivers and related equipment.
| Supply Voltage Range | +8.5 V to +16 V |
|---|---|
| Operating Temperature Range | –40 °C to +85 °C |
| Quiescent Current | 20 mA – 44 mA |
| Signal‑to‑Noise Ratio (S+N/N) | 65 dB – 80 dB |
| Total Harmonic Distortion (typical) | 0.1 % typ |
It operates from +8.5 V up to +16 V.
The device can be used from –40 °C to +85 °C.
The limiting sensitivity is about 12 pV typ at the –3 dB point.
No, National Semiconductor products are not authorized for use as critical components in life‑support devices.