MC33794EK

Sensor And Detector Interfaces Overview

The MC33794EK is an Electric Field Imaging Device manufactured by NXP Semiconductors (formerly Freescale Semiconductor). It is designed for noncontact object sensing applications. The device generates a low-frequency sine wave optimized at 120 kHz, tunable via an external resistor. It supports up to nine electrodes and two reference terminals. Key features include a shield driver for coaxial cables, a +5.0 V regulator, ISO-9141 interface, lamp driver, watchdog timer, and power-on reset. It operates within a temperature range of -40°C to 85°C and is housed in a 54-lead SOICW-EP package.

Sensor And Detector Interfaces Feature Summary

• Supports up to 9 electrodes and 2 references or electrodes
• Shield Driver for Driving Remote Electrodes Through Coaxial Cables
• +5.0 V Regulator to Power External Circuit
• ISO-9141 Physical Layer Interface

Sensor And Detector Interfaces Applications

• Occupant Detection Systems
• Appliance Control Panels and Touch Sensors
• Linear and Rotational Sliders
• Spill Over Flow Sensing Measurement
• Refrigeration Frost Sensing

Sensor And Detector Interfaces Procurement Notes

Verify the datasheet revision and manufacturer details when sourcing. Confirm the specific ordering suffix matches the required package and temperature range. Ensure compatibility with system voltage requirements and communication protocols before integration.

Sensor And Detector Interfaces Selection Notes

Select this component for electric field imaging and proximity detection tasks. Consider the need for an external MCU for ADC processing. Evaluate electrode configuration and cable shielding requirements based on application sensitivity needs.

Sensor And Detector Interfaces Part Context

This part belongs to the sensor family focused on electric field imaging. It complements microcontrollers by handling analog signal generation and detection. It is suitable for automotive and industrial sensing environments requiring robust non-contact measurement capabilities.

Sensor And Detector Interfaces Replacement Considerations

Check for functional equivalents from other manufacturers offering similar electric field sensing capabilities. Verify pinout compatibility and electrical specifications before substitution.

Sensor And Detector Interfaces FAQ

What is the operating frequency of the internal oscillator?

The internal oscillator is optimized for operation around 120 kHz.

How many electrodes can the MC33794 support?

It supports up to 9 electrodes and 2 references or electrodes.

Does the device include an integrated ADC?

No, it does not contain an ADC and is intended to be used with an MCU that has one.