ATMXT288UD-AMBRSPIVA1

Overview

The ATMXT288UD-AMBRSPIVA1 is a maXTouch Automotive Grade 2 touchscreen controller supporting up to 288 nodes. It utilizes a charge-transfer acquisition engine for mutual and self capacitance measurements, enabling robust touch detection with moisture compensation and noise suppression. The device operates within a temperature range of -40°C to +105°C and features an SPI slave interface with speeds up to 8 MHz. Packaged in a 56-pin VQFN (7x7x0.9 mm), it supports up to 10 concurrent touches and includes on-chip gesture reporting.

Feature Summary

• Automotive Grade 2 qualification (-40°C to +105°C) compliant with AEC-Q100 standards
• SPI slave interface operating at frequencies up to 8 MHz
• Supports up to 288 nodes with 12 X lines and 24 Y lines
• Tracks up to 10 concurrent touches with initial latency under 12 ms

Applications

• Automotive infotainment systems requiring high reliability
• On-cell or touch-on display integration for TFT, LCD, and OLED panels
• Applications necessitating operation under condensation or water drop conditions

Procurement Notes

Verify the 'R' suffix indicates tape and reel packaging rather than standard tray supply. Confirm that the specific firmware revision 1.0.AA matches the target system requirements. Ensure the SPI variant selection aligns with the host processor's communication protocol capabilities.

Selection Notes

Select this model over the I2C variant when higher data throughput via SPI is required. Choose the AMB suffix for applications demanding an extended operating temperature range up to +105°C. Ensure the design accommodates the 56-pin VQFN footprint and the necessary external components for the internal voltage pump if XVdd is utilized.

Part Context

This component belongs to the mXT288UD-AMT/mXT288UD-AMB family, which implements Microchip’s patented capacitive sensing method. The device integrates a state-of-the-art CPU to classify and track finger touches with high accuracy. It is designed to work with discrete/out-cell sensors as well as on-cell/touch-on display technologies.

Replacement Considerations

ATMXT288UD-AMBSPIVAO serves as the tray-packaged equivalent with identical electrical specifications but differs only in shipping format.