ATMXT1296M1E-ARVAO

Overview

The ATMXT1296M1E-ARVAO is an automotive-grade touchscreen controller from the maXTouch M1 family, designed for multi-finger thick glove detection on various overlays including on-cell OLED. It features up to 72 reconfigurable touch channels supporting configurations up to 48 X × 60 Y lines (1296 nodes). The device supports Smart Mutual capacitance measurements, improving signal-to-noise ratio by up to +15 dB. It operates within a temperature range of –40°C to +105°C and utilizes a 128-lead TQFP package with I2C or SPI primary communication interfaces.

Feature Summary

• Supports Microchip Knob-on-Display (KoD) technology for detecting mechanical rotary encoder detents
• Includes encrypted configuration parameters and touch coordinate reports using customer security keys
• Provides two PWM interfaces for display backlight control, speaker output, or haptic feedback
• Features dedicated drift calibration algorithms for knob locations and lens bending noise removal

Applications

• Automotive infotainment systems requiring thick glove operation
• On-cell OLED and LCD display integration
• Applications utilizing capacitive mechanical rotary encoders (knobs)
• Systems requiring encrypted touch data transmission

Procurement Notes

Verify the 'AR' suffix indicates Tape and Reel packaging rather than standard Tray packaging. Confirm the 'VAO' suffix corresponds to AEC-Q100 Automotive qualification and the specific firmware revision 2.0.AB. Ensure the design accommodates the 128-lead TQFP thermal requirements for the –40°C to +105°C operating range.

Selection Notes

Select this variant over the ATMXT1296M1T if encryption support and dual communication interfaces are required. The E variant includes Microchip KoD technology, whereas the AMK variant supports Panasonic Magic Knob. Choose ARVAO for automated assembly needs due to its tape and reel packaging format compared to the tray-packaged AVAO version.

Part Context

This component belongs to the ATMXT1296M1 Family, which expands Microchip's maXTouch offerings for automotive applications. The family ensures ASIL-B readiness and supports ISO 26262 functional safety management. Variants within the family differ primarily in interface count, encryption capabilities, and specific knob technology support (Microchip vs. Panasonic).

Replacement Considerations

ATMXT1296M1E-AVAO offers identical functionality but uses Tray packaging instead of Tape and Reel.