Melexis MLX91209 Hall Effect Current Sensor

Melexis MLX91209 Hall Effect Current Sensor is a fully customer-programmable monolithic sensor IC in a standard SIP package. The MLX91209 Hall Current Sensor provides a high-speed analog output signal proportional to the externally applied flux density, enabling developers to construct a precise current sensor solution with a fast response time of 3µs.

The MLX91209 sensor is automotive qualified and appropriate for DC and/or AC measurements up to 200kHz with galvanic isolation, fast response time, and small package size. The current sensor features Over Voltage and Reverse Voltage protection, including diagnostics. The transfer characteristic of the MLX91209 is full customer programmable (offset, sensitivity, and response time).

In a typical application, the MLX91209 Sensor is combined with a ring-shaped soft ferromagnetic core. The MLX91209 is placed in a small air gap, and the current conductor is passed through the inner part of the ferromagnetic ring. The ferromagnetic ring concentrates and amplifies the magnetic flux on the Hall-Sensor IC, generating an output voltage proportional to the current.