Electric Field Imaging Device



The MC33941 is intended for cost-sensitive applications where non-contact sensing of objects is desired. When connected to external electrodes, an electric field is created. The MC33941 detects objects in this electric field. The IC generates a low-frequency sine wave, which is adjustable by using an external resistor and is optimized for 120 kHz.

Features

ï Supports up to 7 Electrodes

ï Shield Driver for Driving Remote Electrodes Through Coaxial

ï High-Purity Sine Wave Generator Tunable with External Resistor

ï Response Time Tunable with External Capacitor

ï +5V Regulator to Power External Circuit

ï Can support up to 28 touch pad sensors (2 way multiplexing)

ï Extended Temperature Range 0 to 110^oC

ï Pb-Free and RoHS compliant



Typical Applications

ï Appliance Control Panels and Touch Sensors

ï Linear and Rotational Sliders

ï Spill Over Flow Sensing Measurement

ï Refrigeration Frost Sensing

ï Industrial Control and Safety Systems Security

ï Proximity Detection for Wake-Up Features

ï Touch Screens

ï Garage Door Safety Sensing

ï PC Peripherals

ï Patient Monitoring

ï Point of Sale Terminals

ï Size Detection

ï Liquid Level Sensing