Honeywell (Minneapolis, MN) [NYSE:HON] has introduced the industry’s first Nanopower Anisotropic Magnetoresistive Sensor ICs, which provide a high level of magnetic sensitivity (as low as 7 Gauss typical) while requiring nanopower (360 nA). When compared to other widely used magnetic technologies, these sensors offer design engineers a number of advantages.

Smaller and more durable than reed switches, at the same sensitivity and essentially the same cost, the new Nanopower Series Magnetoresistive Sensor ICs are ideal for battery powered applications where previously only reed switches could be used due to very low power requirements and large air gap needs.

Compared with Hall-effect sensors, the new Nanopower Series Magnetoresistive Sensor ICs’ higher sensitivity can allow the ability to sense air gaps up to two times the distance. The higher sensitivity improves design flexibility and can offer significant application cost savings by utilizing smaller or lower strength magnets.

The Nanopower Series Magnetoresistive 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, handheld computers, scanners, as well as white goods such as dishwashers, microwaves, washing machines, refrigerators, and coffee machines. They are also designed for medical equipment such as hospital beds, medication dispensing cabinets, infusion pumps, and consumer electronics such as notebook computers, tablets, and cordless speakers.

The Nanopower Series is available in two magnetic sensitivities:

Ultra-high sensitivity SM351LT:  

  • 7 Gauss typical operate.
  • 11 Gauss maximum operate.
  • Very low current draw (360 nA typical). 

Very high sensitivity SM353LT:  

  • 14 Gauss typical operate.
  • 20 Gauss maximum operate.
  • Very low current draw (310 nA typical).

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