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MC34940 - Electric Field Imaging Device

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.

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Datasheet Details

Part number MC34940
Manufacturer Freescale Semiconductor
File Size 320.70 KB
Description Electric Field Imaging Device
Datasheet download datasheet MC34940 Datasheet
Additional preview pages of the MC34940 datasheet.

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Full PDF Text Transcription

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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.
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