NMH1000 Magnetic Switch Sensor

NXP's NMH1000 is a Hall effect sensor contained in a small DFN package (1.4 mm x 1.4 mm x 0.85 mm). The sensor is most sensitive to the magnetic fields that vertically pass through the top-to-bottom surfaces of the package.

The sensor operates at a low supply voltage with ultra-low power consumption (75 nA typical at 1 Hz sample rate). Input consists of a magnetic field ranging in strength from earth-bound background up to a maximum BGMAX. Processing of input consists of functional blocks such as a configurable state machine, analog-to-voltage conversion of the input, and comparison to generate the output arranged in linear succession. NXP's sensor detects the absence of a magnetic field and outputs either a high or low state on the comparison with preset thresholds.

The NMH1000 ultra-low-power and low-voltage magnetic switch replaces mechanical and bulky switches with a small-footprint DFN package. Mechanical switches are vulnerable to bad weather conditions and environmental changes which result in a much shorter lifespan than magnetic switches.