Capacitive Switches

Capacitive Switches
The MS888X-series are proximity sensors that make use of a patent from EDISEN Sensor Systeme GmbH & CO KG. A change in capacitance is detected by a digital algorithm that is auto-calibrating such that all stray capacitances are compensated. This results in a reliable proximity switch.

 

Applications

• Medical
• Automotive
• Buildings & Sanitary
• Mobile application
• Hermetical or vandal proof switches
• Intrinsic safety

 

General Features

• Dynamic proximity switch
• Digital processing method
• Automatic calibration
• Open-drain output (P-type MOSFET, external load between pin and ground)
• Low-power battery operation possible
• Adjustable response time
• Adjustable sensitivity
• Output configurable as push-button, toggle or pulse
• Large voltage operating range
• Internal voltage regulator
• Large operating temperature range (-40°C to 85°C)

 

Type specific properties

1- and 2-channel:

• Configurable output
• Large voltage operating range (VHI = 3 to 9V)

8-channel:

• Keypad, matrix and slider applications up to 8x8 matrix (2 chips cascaded)
• Unrivalled current consumption, typically 10uA
• Fast-mode Plus (Fm+) I2C-Interface with interrupt generation
• Sleep mode <100nA