ATMXT288UD-AMBSPIVA1

Overview

The ATMXT288UD-AMBSPIVA1 is an automotive-grade capacitive touchscreen controller from Microchip Technology's maXTouch family. It features a charge-transfer acquisition engine supporting up to 288 nodes, enabling simultaneous tracking of 10 concurrent touches with initial latency under 12 ms. The device operates via SPI slave interface at speeds up to 8 MHz and supports both mutual and self-capacitance measurements for robust detection. It functions within a temperature range of -40°C to +105°C (Grade 2) in a 56-pin VQFN package.

Feature Summary

• AEC-Q100 qualified and developed using Automotive SPICE Level 3 certified processes
• Supports up to 12 X lines and 24 Y lines for touchscreen and key arrays
• Integrated noise suppression handling up to 240 V PP ambient noise
• Includes lens bending algorithms and palm recovery for display integration

Applications

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

Procurement Notes

Verify the specific suffix 'AMB' indicates Grade 2 temperature rating (-40°C to +105°C). Confirm the 'SPI' variant designation matches system interface requirements. Check current availability status as automotive components may have restricted supply chains or long lead times depending on the region.

Selection Notes

Select this part when AEC-Q100 qualification and extended temperature operation are mandatory. Ensure the host processor supports SPI communication up to 8 MHz. Consider the 56-pin VQFN footprint constraints during PCB layout. Verify that the required node count does not exceed the 288-node limit for the specific sensor configuration.

Part Context

This component belongs to the mXT288UD-AMT/mXT288UD-AMB 1.0 family. The 'AMB' suffix denotes the automotive Grade 2 temperature range, distinguishing it from the standard Grade 3 'AMT' variant. The 'SPI' suffix specifies the communication protocol, differentiating it from I2C variants within the same package.

Replacement Considerations

ATMXT288UD-AMTSPIVA1 offers identical functionality but with a reduced operating temperature range of -40°C to +85°C (Grade 3). Substitution requires verification that the application environment remains within the lower thermal limits.