ATMXT144UD-AMBRI2CVA1

Overview

The ATMXT144UD-AMBRI2CVA1 is a maXTouch Adaptive Sensing Touchscreen Controller designed for automotive applications. It features a unique charge-transfer acquisition engine supporting mutual and self capacitance measurements to accurately track up to 10 concurrent touches. The device operates within a –40°C to +105°C temperature range (Grade 2) and utilizes an I2C interface supporting Standard, Fast, and Fast-mode Plus speeds. It is housed in a 56-pin VQFN package measuring 7 × 7 × 0.9 mm with a 0.4 mm pitch.

Feature Summary

• Supports up to 144 nodes with 12 X lines and 24 Y lines for touchscreen and key arrays
• Tracks up to 10 concurrent touches with initial latency under 12 ms
• Includes moisture compensation for water drops up to 22 mm diameter
• Features noise suppression handling up to 240 V PP ambient noise

Applications

• Automotive infotainment systems
• Vehicle instrument clusters
• On-cell or touch-on display integration

Procurement Notes

Verify the ordering suffix 'R' confirms tape and reel packaging rather than standard tray supply. Confirm the 'I2C' designation matches the required communication protocol over SPI alternatives. Ensure the 'AMB' suffix aligns with the specified –40°C to +105°C Grade 2 operating temperature range for the target environment.

Selection Notes

Select this variant when an I2C interface is preferred over SPI for system connectivity. Choose the Grade 2 temperature rating if operation exceeds +85°C. Verify that the 56-pin VQFN footprint fits the PCB layout constraints. Consider the 3.3V nominal supply requirements for digital, analog, and I/O domains during power design.

Part Context

This component belongs to the mXT144UD-AMT/mXT144UD-AMB family of maXTouch controllers. It is AEC-Q100 qualified and developed following Automotive SPICE Level 3 certified processes. The device supports both on-cell and discrete sensor configurations, offering flexibility for various display technologies including TFT, LCD, and OLED panels.

Replacement Considerations

ATMXT144UD-AMTI2CVAO: Identical electrical specifications but supplied in trays instead of tape and reel.

FAQ

Does this controller support gesture recognition?

Yes, the device reports one-touch and two-touch gestures on-chip.

What is the maximum size of water drop it can compensate for?

It provides moisture compensation for condensation or water drops up to 22 mm in diameter without false touches.

Can this device be used with glass front panels?

Yes, it works with PET or glass front panels, including curved profiles, with specific stack-up approval recommended.