Honeywell – Magnetoresistive Sensor ICs

Honeywell’s Nanopower Series Magnetoresistive (MR) Sensor ICs are ultra-sensitive devices designed to accommodate a wide range of applications with large air gaps, small magnetic fields and low power requirements.

The sensor ICs respond to either a North or South pole applied in a direction parallel to the sensor. They do not require thehoneywell magnet polarity to be identified, simplifying installation and potentially reducing system cost.

These sensor ICs use a very low average current consumption and a push-pull output which does not require a pull-up resistor. The sensor ICs can operate from a supply voltage as low as 1.65 V, promoting energy efficiency.

The Nanopower Series is available in two magnetic sensitivities to accommodate a variety of application needs:

  • SM351LT: For applications requiring ultra high magnetic sensitivity (7 G typical operate, 11 G maximum operate) and a very low current draw (360 nA typical).
  • SM353LT: For applications requiring very high magnetic sensitivity (14 G typical operate, 20 G maximum operate) and a very low current draw (310 nA typical).

These Magnetoresistive Sensor ICs, Nanopower Series, are supplied in the subminiature SOT-23 surface mount package on tape and reel (3000 units per reel), for use in automated pick-and-place component installation.

 Key Features:

  • High sensitivity: 7 Gauss typ., 11 Gauss max. (SM351LT); 14 G typ., 20 Gauss max. (SM353LT)
  • Nanopower: Average current of 360 nA typ. (SM351LT) and 310 nA typ. (SM353LT)
  • Supply voltage range: 1.65 Vdc to 5.5 Vdc; simplifies design-in
  • Omnipolar sensing: Activates with either pole from a magnet
  • Temperature range: -40 °C to 85 °C [-40 °F to 185 °F]
  • Push-pull output: Does not require external pull-up resistor
  • Non-chopper stabilized design
  • RoHS-compliant materials: Meets Directive 2002/95/EC
  • Package: SOT-23

Potential Applications:

Industrial

  • Mobile equipment (i.e., handheld computing equipment, scanners)
  • Water, electric and gas utility meters
  • Building access control; reed switch replacement for batteryoperated security systems
  • Industrial smoke detectors

Medical

  • Exercise equipment
  • Infusion pumps
  • Drawer position sensing (e.g., medical cabinets)
  • Hospital beds

White Goods

  • Lid, door and drawer position detection
  • Fluid flow

Medium-Sized Consumer Electronics

  • Battery-optimization position sensor
See also

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