Honeywell Nanopower Anisotropic Magnetoresistive Sensor ICs

Honeywell’s Nanopower Anisotropic Magnetoresistive Sensor ICs provide a high level of magnetic sensitivity - as low as 7 gauss typical - while requiring nanopower up to 360 nA in value.

The ICs are said to be smaller and more durable than reed switches, operating with the same sensitivity. They are suitable for battery-powered applications with low power requirements and large air gap needs.

The sensor ICs are designed for use in a wide range of battery-operated applications including water and gas meters, electricity meters, industrial smoke detectors, exercise equipment, security systems and scanners. They are also suitable for whitegoods such as dishwashers and refrigerators, medical equipment such as hospital beds and infusion pumps, and consumer electronics such as computers and tablets.

Omnipolarity allows the sensor ICs to be activated by either a north or south pole, eliminating the need to identify magnet polarity and reducing system cost by simplifying the installation process. The push-pull (CMOS) output does not require external resistors, making it easier for engineers to operate. Electrical noise generated by the sensor is eliminated due to a non-chopper stabilised design. The sub-miniature SOT-23 surface-mount package - supplied on both tape and reel - is smaller than most reed switches, allowing for use in automated pick-and-place component installation

Users can choose from two magnetic sensitivities: ultrahigh sensitive SM351LT (7 gauss typical operate, 11 gauss maximum operate, 360 nA current draw) and very high sensitivity SM353LT (14 gauss typical operate, 20 gauss maximum operate, 310 nA current draw).