ATMXT288UD-AMTI2CVA1

Overview

The ATMXT288UD-AMTI2CVA1 is a maXTouch touchscreen controller featuring a charge-transfer acquisition engine for capacitive sensing. It supports up to 288 nodes, configured as 12 X and 24 Y lines, enabling multi-touch tracking of up to 10 concurrent touches with a typical report rate of ≥70 Hz. The device operates on nominal 3.3V supplies (Vdd, VddIO, AVdd) and includes an internal voltage pump generating 6.6V for the XVdd line. It utilizes an I2C interface supporting Standard, Fast, and Fast-mode Plus speeds, housed in a 56-pin VQFN package.

Feature Summary

• AEC-Q100 qualified and developed using Automotive SPICE Level 3 certified processes.
• Supports mutual and self capacitance measurements with moisture compensation for water drops up to 22 mm.
• Integrated noise suppression handles up to 240 V PP ambient noise between 1 Hz and 1 kHz.
• Includes lens bending algorithms and palm recovery features for display noise reduction.

Applications

• Automotive infotainment systems requiring functional safety compliance.
• In-vehicle displays up to 6.34 inches with 2:1 aspect ratio.
• Curved glass or PET film front panels with integrated touch sensors.

Procurement Notes

Verify the ordering suffix 'I2C' confirms the I2C slave interface variant rather than SPI. Confirm the 'T' suffix indicates Grade 3 temperature range (-40°C to +85°C). Ensure the specific revision matches firmware requirements. Check for RoHS compliance status in current documentation. Validate package marking details against physical inventory.

Selection Notes

Select this part for applications requiring AEC-Q100 qualification and up to 288 sensor nodes. Choose the I2C variant if system bandwidth allows for Standard, Fast, or Fast-mode Plus communication. Consider the SPI variant if higher data rates up to 8 MHz are necessary. Verify that the -40°C to +85°C operating range meets environmental constraints.

Part Context

This component belongs to the mXT288UD-AMT/mXT288UD-AMB family within Microchip's maXTouch portfolio. It shares the same core sensing engine and node count with the AMB variant, which offers an extended temperature range up to +105°C. Both variants utilize the same 56-pin VQFN package and support identical sensor configurations.

Replacement Considerations

The ATMXT288UD-AMBI2CVA1 serves as a direct replacement for the ATMXT288UD-AMTI2CVAO, offering the same electrical characteristics but with an extended temperature range up to +105°C. Ensure firmware compatibility when upgrading from older revisions like 1.0.AA to newer versions.