Honeywell SS496A

The SS490 series are compact, versatile linear Hall-effect devices activated by the magnetic field from a permanent or electromagnet. The ratiometric output voltage is set by the supply voltage and varies in proportion to the magnetic field strength. The integrated circuit improves temperature stability and sensitivity. Laser-trimmed thin-film resistors provide high accuracy (null accuracy to ±%, sensitivity accuracy to ±3%) and temperature compensation. They respond to positive or negative gauss magnetic fields and can monitor a single or both magnetic poles. A quad Hall sensing element minimizes the effect of mechanical or thermal stress on the output. The positive temperature coefficient of sensitivity (typically +0.02%/°C) helps compensate for the negative temperature coefficient of low-cost magnets, enabling reliable design over a wide temperature range. Rail-to-rail operation (over the full voltage range) provides a more useful signal for higher accuracy. These devices operate over a temperature range of -40°C to 150°C [-40°F to 302°F], suitable for industrial and automotive environments. The SS490B version offers a cost-effective sensing solution with wider null and sensitivity tolerances and greater temperature drift compared to the high-performance SS490A. Both the SS490A and SS490B versions feature a typical continuous sink or source output of 1.5mA, a supply current of 7mA at 25°C [77°F] with a 5.0V supply, and deliver predictable performance across the entire temperature range. For design flexibility, these devices are available in the following flat TO-92 package styles:

• SS4XX: Straight standard leads, bulk pack
• SS4XX-L: Straight long leads, bulk pack
• SS4XX-T2: Formed leads, ammo pack
• SS4XX-T3: Straight standard leads, ammo pack
• SS4XX-S: Surface mount, bulk pack
• SS4XX-SP: Surface mount, pocket tape and reel pack

• Linear output for flexible circuit design
• Quad Hall IC design minimizes mechanical stress effects
• Responds to positive or negative Gauss magnetic fields
• Energy-efficient operation at 7mA current under 5V DC
• Single sink or source output
• Rail-to-rail operation provides more useful signal for higher accuracy
• Temperature-compensated magnetic circuit enables stable operation across wide temperature range of -40°C to 150°C [-40°F to 302°F]

Industrial Applications:

• Basic current sensing for motor load monitoring and detection
• Anti-tamper magnetic field sensing in smart remote utility meters
• Pump control in heavy equipment and home appliances
• Simple linear or angular displacement sensing
• Handlebar/throttle position sensing in e-bikes and scooters
• Current sensing in appliances
• Speed regulation triggering in power tools and appliances
• Magnetic code reading in safes, security systems, and building access control systems

Medical Applications: Position sensing in infusion pumps