ATMXT288UD-AMBI2CVA1

Overview

The ATMXT288UD-AMBI2CVA1 is a maXTouch touchscreen controller from Microchip Technology, designed for automotive applications. It supports up to 288 nodes, configured with 12 transmit and 24 receive lines, enabling tracking of up to 10 concurrent touches. The device operates within a temperature range of -40°C to +105°C (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.

Feature Summary

• AEC-Q100 qualified and developed following Automotive SPICE Level 3 certified processes.
• Supports mutual and self capacitance measurements with moisture/water compensation for reliable touch detection.
• Features burst frequency selection and configurable Tx waveform shaping to reduce EMC disturbance.
• Includes on-chip gesture reporting and enhanced algorithms for lens bending noise removal and palm suppression.

Applications

• Automotive infotainment systems requiring multi-touch interfaces.
• Vehicle control panels with curved glass or PET film sensors.
• Displays supporting TFT, LCD (ITPS, IPS), and OLED technologies.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm packaging type and temperature grade. The 'AMB' designation indicates Grade 2 operation (-40°C to +105°C). Confirm interface requirements, as this part number specifies the I2C variant. Check for availability of tape and reel options if automated assembly is required, noting that standard packaging may be supplied in trays.

Selection Notes

Select this component when automotive functional safety standards such as AEC-Q100 are mandatory. Ensure the host system supports I2C communication at up to 1 MHz. Verify that the sensor stack-up, including glass thickness and electrode pitch, aligns with the device's 288-node capacity. Consider the need for external voltage pumping if XVdd is not connected to AVdd.

Part Context

This part belongs to the mXT288UD-AM family, which includes variants with different temperature grades and interface protocols. The 'I2C' suffix distinguishes it from SPI-based models like the ATMXT288UD-AMTSPIVA1. The 'R' suffix denotes tape and reel packaging, while its absence typically indicates tray packaging.

Replacement Considerations

Direct replacements include other parts within the mXT288UD-AM family, such as the ATMXT288UD-AMTI2CVAO for Grade 3 temperature ranges. Cross-model substitution requires verifying interface compatibility and node allocation limits.