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SM351LT
Overview
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).
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
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