DESCRIPTION

· The LDC0851 is a close-range inductive switch designed for contactless applications like presence detection and event counting.
· It triggers when a conductive object nears the sensing coil, with hysteresis ensuring reliable switching.
· The differential design prevents false triggers from environmental factors like temperature or humidity.
· It operates without an MCU, offering a simple solution.
· Inductive sensing ensures reliability in harsh environments, unaffected by dirt, oil, or moisture.
· Solid-state switching eliminates failures common in reed, mechanical, or contact switches.
· Unlike competitors, it doesn't require magnets and is immune to DC magnetic fields.

FEATURES

· Functional Safety-Capable with documentation for system design.
· Threshold tolerance: <1% of coil diameter.
· Temperature-stable switching operation.
· Average supply current: <20µA at 10sps.
· Shutdown supply current: 140nA.
· Push-pull output.
· Resistor-programmable threshold.
· Insensitive to DC magnetic fields.
· Contactless switching operation.
· Sample rate up to 4ksps.
· Supply voltage: 1.8V – 3.3V.
· Operating temperature range: –40 to 125 °C.

APPLICATIONS

· Event Counting: Fan Speed RPM Detection, Incremental Encoder/Knob.
· Open/Close Switches: Home Security and Tamper Detection.
· Industrial Proximity Switch.