Hall switches replace reed switches for level sensing
Melexis has introduced the MLX92362 and MLX92361 floating switches for continuous level sensing. The tiny, contactless and programmable ICs are claimed to provide better assembly yield and reliability in fluid level measurements.
The isolated floating output of the MLX92362 only requires power to directly drive the load. Assembly is facilitated due to CMOS testability, solder reflow and contactless operation. A series of ICs can be synchronised via the same three-wire interface.
Based on Triaxis technology, the patented floating switches deliver continuous level sensing. Programmability allows customers to fine-tune modules to optimise them for a specific application. These devices can be factory trimmed (MLX92361) or adjusted by the customer (MLX92362).
The Hall switch devices directly replace reed switches, without the need for implementation changes or additional wiring, explained Melexis. They have smaller dimensions compared to reed switches – providing a five times reduction in form factor. Without moving parts, these solid-state components offer greater reliability and longer working lifespans, the company added and eliminate mechanical wear and tear issues. The high failure rates that reed switches often exhibit during module assembly are eliminated.
The MLX92362 and MLX92361 both feature fully isolated output for direct load driving, with currents up to 100mA being switched. They offer a high supply rail versatility with a 4.5V to 28V voltage range. Multiple sensors can be connected in a single module and synchronised via the built-in daisy-chain functionality.
Both the MLX92362 and MLX92361 are housed in six-lead TSOT packages. The surface mount format simplifies the assembly process through reflow soldering. They support an operational temperature range of -40 to +150 degrees C.
“Use of silicon on insulator (SOI) technology provides an output that is completely isolated from the supply voltage. Our advanced Triaxis magnetic sensing leads to far higher accuracy and reliability,” said Dieter Verstreken, global marketing manager position sensors at Melexis.
Samples and an affordable development programming tool are available now.
Melexis designs, develops and mixed-signal semiconductor sensor and actuator components which address the challenges of integrating sensing, driving and communication into next-generation products and systems that improve safety, raise efficiency, support sustainability and enhance comfort.
Melexis specialises in automotive semiconductor sensors. Its portfolio of sensors and driver ICs are used in smart appliances, home automation, industrial and medical applications. Sensing devices include magnetic sensors, MEMS sensors (pressure, TPMS, infrared), sensor interface ICs, optoelectronic single point and linear array sensors and time of flight. The company’s driver IC portfolio incorporates advanced DC and BLDC motor controllers, LED drivers and FET pre-driver ICs.
Melexis is headquartered in Belgium and employs over 1,500 people in 18 locations worldwide.