Hall Effect Based Programmable SOI Floating Switch ICs Deliver Failure-free Assembly of Solutions for Liquid Level Measurement
Melexis has introduced two new unique plug-and-play magnetic switchesMLX92362andMLX92361that deliver continuous level sensing and directly replace reed switches, without the need for implementation changes or additional wiring. These new Hall switch devices are based on Triaxis technology and can be factory trimmed (MLX92361) or adjusted at customer’s End of Line (MLX92362). These devices have much smaller dimensions compared to reed switches - providing a 5x reduction in form factor.
These new switches feature fully isolated output for direct load driving, with currents up to 100 mA being switched and offer a high supply rail versatility with a 4.5 V to 28 V voltage range while supporting an operational temperature range of -40°C to 150°C. Moreover, multiple sensors can be connected in a single module and synchronized via the built-in daisy-chain functionality.
Without moving parts, these solid-state components offer greater reliability and longer working lifespans. They eliminate mechanical wear and tear issues. The high failure rates that reed switches often exhibit during module assembly are eliminated. Their surface mount format simplifies the assembly process through reflow soldering and both are housed in 6-lead TSOT packages.
Features
Normal or lateral magnetic sensitivity options X,Y,Z
Switch output – fully isolated from the supply voltage, OUTA/OUTB potentials can be below GND or above VDD
Typical RON of 3Ω
Output current up to 100mA (AMR 200mA)
Programmable magnetic thresholds and threshold temperature coefficient
Programmable magnetic Latch, Unipolar and Omnipolar Switch function
Built-in daisy chain functionality to synchronize multiple devices
Operating voltage range from 4.5V to 28V
Low average supply current – 180µA typical
Under-Voltage Reset protection
Thermal protection
Package RoHS compliant TSOT-6L
Applications
Reed switch replacement
Fluid level meter applications
Push button
Direct load driving
HIGH/LOW side switch