Freescale Semiconductor Technical Data Document Number: MC33941 Rev.
3, 11/2006 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.
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