MC33794数据手册恩XP中文资料规格书

描述 Description

Overview The MC33794 is intended for applications where non-contact sensing of objects is desired. It contains circuitry necessary to generate a low level electric field and measure the field loading caused by objects moved into the field. The MC33794 is intended for use in detecting objects in an electric field associated with an electrode. The IC generates a low frequency sine wave. The frequency is adjustable by using an external resistor and is optimized for 125 kHz. The sine wave has very low harmonic content to avoid the generation of harmonic interference. The internal generator produces a nominal 5.0 V peak-to-peak output which is passed through an internal resistor of about 22kOhm. The MC33794 contains support circuits for an MCU to allow the construction of a 2 chip E-field system.
Archived content is no longer updated and is made available for historical reference only.
 
Please note rev 6.0 datasheet has LAMP_CTRL and LAMP_OUT pins reversed. This effects all previous revisions. Rev 7.0 will correct the error.

特性 Features

•Shield Driver for Driving Remote Electrodes Through Coaxial Cables

•+5.0 V Regulator to Power External Circuit

•Lamp Driver Output

•Watchdog and Power-ON Reset Timer

•Critical Internal Nodes Scaled and Selectable for Measurement

•High-Purity Sine Wave Generator Tunable with External Resistor

•Supports up to 9 Electrodes and 2 References or Electrodes

•ISO-9141 Physical Layer Interface

•Pb-Free and RoHS compliant