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Overview

Nanopower Series anisotropic magnetoresistive (AMR) sensor IC, omnipolar, high sensitivity (7 G typ.), SOT-23, 3000 units/tape and 178 mm [7 in] reel.

Honeywell’s Nanopower Series anisotropic magnetoresistive (AMR) 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 the 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.

SM351LT: For applications requiring ultra high magnetic sensitivity (7 Gauss typical operate, 11 Gauss maximum operate) and a very low current draw (360 nA typical).

SM351LT Low Power - Honeywell


Technical Specifications

Series Name Nanopower
Product Type Anisotropic magnetoresistive (AMR) digital position sensor IC
Magnetic Actuation Type Omnipolar
Supply Voltage 1.65 V min., 1.8 V typ., 5.5 V max.
Output Voltage Low: 0 V min., 0.03 V typ., 0.15 V max.; high: Vs-0.15 V min., Vs-0.03 V typ., Vs max.
Supply Current 100 uA typ.
Output Type Digital
Operating Temperature -40°C to 85°C [-40°F to 185°F]
Operate Point 3 G min., 7 G typ., 11 G max.
Release Point 2 G min., 5 G typ.
Differential 2 G typ.
Package Type SOT-23, pocket tape and reel, 3000 units/reel
Availability Global

Technical Specifications

Series Name Nanopower
Product Type Anisotropic magnetoresistive (AMR) digital position sensor IC
Magnetic Actuation Type Omnipolar
Supply Voltage 1.65 V min., 1.8 V typ., 5.5 V max.
Output Voltage Low: 0 V min., 0.03 V typ., 0.15 V max.; high: Vs-0.15 V min., Vs-0.03 V typ., Vs max.
Supply Current 100 uA typ.
Output Type Digital
Operating Temperature -40°C to 85°C [-40°F to 185°F]
Operate Point 3 G min., 7 G typ., 11 G max.
Release Point 2 G min., 5 G typ.
Differential 2 G typ.
Package Type SOT-23, pocket tape and reel, 3000 units/reel
Availability Global

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
Nanopower Series Magnetoresistive Sensor ICs Datasheet (English) Datasheet English 887KB
Nanopower Series Magnetoresistive Sensor ICs Installation Instructions (English) Installation Instructions English 727KB
SOT-23 highres photo Photo -- 471KB
Hospital Applications Brochure English 5MB
SOT-23 lowres photo Photo -- 59KB
Magnetic Sensor IC SOT-23 CAD Model CAD Model -- 84KB
Nanopower Series Magnetoresistive Sensor ICs Application Note English 72KB
Magnetoresistive Sensors: Position and Solid State Sensing Application Note English 172KB
Sensors in Infusion Pumps Application Note English 2MB

Product Features

  • High sensitivity: 7 Gauss typ., 11 Gauss max.
  • Nanopower: Average current of 360 nA typ.
  • 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

Applications

Industrial:

  • Mobile equipment (i.e., handheld computing equipment, scanners)
  • Water, electric and gas utility meters
  • Building access control; reed switch replacement for battery-operated 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

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