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MC33941 Datenblatt(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC33941 Datenblatt(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 11 page Document Number: MC33941 Rev. 4 Freescale Semiconductor Technical Data © Freescale Semiconductor, Inc., 2008. All rights reserved. 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. The sine wave has very low harmonic content to reduce harmonic interference. The MC33941 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 • +5V Regulator to Power External Circuit • Can support up to 28 touch pad sensors (2 way multiplexing) • Extended Temperature Range -40° to 110°C • Pb-Free and RoHS compliant 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 Temperature Range Drawing Package MC33941EG/R2 -40° to 110°C 98ASB42564B SOICW-24 MC33941 ELECTRONIC FIELD IMAGING DEVICE EG SUFFIX (Pb-FREE) 24-TERMINAL SOICW CASE 751E-05 N/C E7 E6 E5 E4 E3 E2 E1 TEST GND SHIELD AGND DGND N/C SHIELDEN C B A LEVEL LPCAP ROSC VDDCAP VPWR VCCCAP Pin Connections |
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