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MC34940 Datasheet

Part Number MC34940
Manufacturers Freescale Semiconductor
Logo Freescale Semiconductor
Description Electric Field Imaging Device
Datasheet MC34940 DatasheetMC34940 Datasheet (PDF)

www.DataSheet4U.com Freescale Semiconductor Technical Data Document order number: MC34940 Rev 2.0, 2/2006 Electric Field Imaging Device The 34940 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 34940 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. The sine wave h.

  MC34940   MC34940






Electric Field Imaging Device

www.DataSheet4U.com Freescale Semiconductor Technical Data Document order number: MC34940 Rev 2.0, 2/2006 Electric Field Imaging Device The 34940 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 34940 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. The sine wave has very low harmonic content to reduce harmonic interference. The 34940 also contains support circuits for a microcontroller unit (MCU) to allow the construction of a two-chip E-field system. Features • • • • • • Supports up to 7 Electrodes Shield Driver for Driving Remote Electrodes Through Coaxial High-Purity Sine Wave Generator Tunable with External Resistor Response Time Tunable with External Capacitor Can support up to 28 touch pad sensors Pb-Free and RoHS compliant 34940 ELECTRONIC FIELD IMAGING DEVICE Typical Applications • • • • • • • • • • • • • Appliance Control Panels and Touch Sensors Linear and Rotational Sliders Spill Over Flow Sensing Measurement Refrigeration Frost Sensing Industrial Control and Safety Systems Security Proximity Detection for Wake-Up Features Touch Screens Garage Door Safety Sensing PC Peripherals Patient Monitoring Point of Sale Terminals Size Detection Liquid Level Sensing ORDERING INFORMATION Device Name MC34940EG/R2 Temperature Range 0 to 90°C Dr.


2006-11-30 : AT1310    AT1312A    AT1312B    AT1312C    AT1313    AT1314    AT1362A    AT1362B    AT1366    AT1366B   


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