ATMXT1067TD-ATRSPIVAO

Overview

The ATMXT1067TD-ATRSPIVAO is an automotive-grade capacitive touchscreen controller from Microchip Technology's maXTouch Adaptive Sensing series. It features a unique charge-transfer acquisition engine and supports up to 1066 X/Y nodes with simultaneous mutual and self-capacitance measurements. The device operates on 3.3V supplies, utilizes an SPI slave interface (up to 8 MHz), and tracks up to 16 concurrent touches. Packaged in a 128-lead TQFP, it functions within a temperature range of –40°C to +85°C.

Feature Summary

• AEC-Q100 qualified and developed using Automotive SPICE Level 3 certified processes
• Supports up to 1066 nodes with 16 concurrent multi-touch tracking
• Integrated noise suppression for ambient and power-line interference
• SPI communication interface with dedicated debug capabilities

Applications

• Automotive infotainment systems
• In-dash display interfaces
• Vehicle control panels

Procurement Notes

Verify the 'R' suffix indicates tape and reel packaging rather than standard tray supply. Confirm the 'AT' designation aligns with the required –40°C to +85°C operating grade. Ensure firmware revision 1.0.AA compatibility with existing system configurations before procurement.

Selection Notes

Select this model for applications requiring AEC-Q100 compliance and SPI connectivity. Choose the 'AT' variant for Grade 3 (-40°C to +85°C) environments; use 'AB' for Grade 2 (-40°C to +105°C). The 'R' suffix specifies tape and reel packaging, while its absence denotes tray packaging.

Part Context

This component belongs to the mXT1067TD-Ax SPI Variant family. It shares core sensing technology with other maXTouch controllers but is distinguished by its SPI interface and specific package options. The part number structure encodes temperature grade, package type, and reel configuration.

Replacement Considerations

The ATMXT1067TD-ATSPIVAO serves as the tray-packaged equivalent. For higher temperature requirements, consider the ATMXT1067TD-ABRSPIVAO. Verify pinout and firmware compatibility when substituting across different maXTouch generations.

FAQ

What is the maximum report rate for single-finger touch?

The device supports a scan speed of up to 112 Hz for one finger, subject to configuration.

How does the controller handle water interference?

It includes moisture compensation that prevents false touches from condensation or water drops up to 22 mm diameter while maintaining one-finger tracking.

What are the power supply requirements?

Digital (Vdd), Digital I/O (VddIO), and Analog (AVdd) supplies are nominally 3.3V. An internal voltage pump generates 6.6V for the X line drive (XVdd).