The LM1815 is an adaptive sense amplifier and default gating circuit for motor control applications. It provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil.
The LM1815 is an adaptive variable‑reluctance sensor amplifier designed for motor‑control applications. It provides a one‑shot pulse output synchronized with the zero‑crossing of a ground‑referenced input signal and includes adaptive hysteresis, single‑supply operation from 2 V to 2 V, and CMOS‑compatible logic.
The document lists absolute maximum ratings, electrical characteristics, typical performance curves, truth tables, application hints, and physical dimensions for the 14‑lead Small‑Outline (M) package. It also gives ordering information (LM1815M or LM1815N) and outlines typical uses such as position sensing with notched wheels, zero‑cross switches, motor speed control, tachometer functions, and engine testing.
| Package Type | 14‑Lead Small Outline (M) |
|---|
It is used for position sensing with notched wheels, zero‑cross switches, motor speed control, tachometer functions, and engine testing.