ATMXT1067TD-ATI2CVAO

Overview

The ATMXT1067TD-ATI2CVAO is a maXTouch touchscreen controller designed for automotive applications, featuring AEC-Q100 qualification and Automotive SPICE Level 3 development processes. It utilizes a charge-transfer acquisition engine to support up to 1066 nodes, enabling tracking of 16 concurrent touches with a typical report rate of ≥85 Hz. The device operates on 3.3 V supplies, supports I2C interfaces up to 1 MHz, and includes an SPI debug interface. It is housed in a 128-lead TQFP package and functions within a temperature range of –40°C to +85°C.

Feature Summary

• AEC-Q100 qualified with CISPR 25 compliance for automotive noise immunity
• Supports up to 1066 nodes and 16 simultaneous touch points
• Integrated moisture/water compensation and glove touch detection
• I2C communication (up to 1 MHz) with dedicated SPI debug interface

Applications

• Automotive infotainment systems
• Vehicle instrument clusters
• Center console control panels

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System table to confirm packaging type and temperature grade. The 'AO' suffix indicates standard tray packaging for the Grade 3 (-40°C to +85°C) variant. Confirm that the required firmware revision matches the design specifications before procurement.

Selection Notes

Select this component for designs requiring high node counts and robust environmental performance in automotive environments. Ensure the host processor supports the required I2C speeds and that the system power budget accommodates the 3.3 V digital and analog supply requirements. Verify sensor stack-up compatibility with the specified front panel material thickness limits.

Part Context

This part belongs to the mXT1067TD series, which implements Microchip’s patented capacitive sensing method. The device integrates both mutual and self-capacitance measurements to enhance touch accuracy and reliability. It is distinct from non-automotive grades by its adherence to strict automotive quality standards and extended process certifications.

Replacement Considerations

The ATMXT1067TD-ATRI2CVAO serves as a functional replacement with identical electrical characteristics but differs in packaging format, being supplied in tape and reel instead of trays. Other maXTouch TD series controllers may offer different node counts or package types but require re-evaluation of pinout and configuration compatibility.

FAQ

What is the maximum number of concurrent touches supported?

The controller supports up to 16 concurrent touches tracked in real time.

Does the device support operation under wet conditions?

Yes, it features moisture/water compensation capable of preventing false touches from condensation or water drops up to 22 mm in diameter.

What are the available communication interfaces?

It provides an I2C slave interface supporting Standard, Fast, and Fast-mode Plus (up to 1 MHz), along with an additional SPI interface for debugging and raw data access.