ATMXT1296M1E-AVAO

Overview

The ATMXT1296M1E-AVAO is an automotive-grade touchscreen controller from the maXTouch M1 family, designed for multi-finger thick glove detection on overlays including on-cell OLED. It features up to 72 reconfigurable touch channels supporting configurations up to 48 X × 60 Y lines (1296 nodes). The device supports Smart Mutual capacitance measurements, improving signal-to-noise ratio by up to +15 dB. It operates within a temperature range of –40°C to +105°C and utilizes a 128-lead TQFP package with dimensions of 14 × 14 × 1 mm. Primary communication interfaces include I2C (up to 3.4 MHz) or SPI (up to 8 MHz), with optional secondary interfaces.

Feature Summary

• Supports Microchip Knob-on-Display (KoD) technology for detecting mechanical rotary encoder detents.
• Includes device encryption for configuration parameters and touch coordinate reports using customer security keys.
• Features automated PWM generation for display backlight control and haptic feedback triggers.
• Provides two general-purpose ADC pins for temperature and voltage monitoring.

Applications

• Automotive infotainment systems requiring robust multi-touch input.
• Displays with on-cell OLED or LCD technologies.
• Applications utilizing capacitive mechanical rotary encoders integrated into the touch panel.
• Systems requiring encrypted touch data transmission and firmware updates.

Procurement Notes

Verify the specific ordering suffix against the Product Identification System table in the datasheet to confirm packaging type and qualification status. The 'A' indicates QFP packaging, 'V' denotes AEC-Q100 automotive qualification, and 'AO' specifies tray packing with industrial/automotive grade temperature range. Ensure compatibility with the required firmware revision 2.0.AB for full feature support.

Selection Notes

Select this variant if KoD functionality and device encryption are required, as these features distinguish it from the ATMXT1296M1T series. Confirm that the 128-lead TQFP package fits the PCB layout constraints. Verify that the host system supports the necessary I2C or SPI interface speeds and that the power supply rails match the nominal 3.3V requirements for Vdd, VddIO, and AVdd.

Part Context

This component belongs to the ATMXT1296M1 Family, which expands Microchip's maXTouch portfolio with automotive-grade controllers. The family includes variants like the ATMXT1296M1E-AMK, which supports Panasonic Magic Knob technology instead of KoD. All family members share the same core sensing capabilities but differ in HMI features, security options, and interface configurations.

Replacement Considerations

Direct functional replacements within the same family include the ATMXT1296M1E-ARVAO (tape and reel version) or the ATMXT1296M1E-AMKVAO if Panasonic Magic Knob support is needed instead of KoD. Legacy versions such as the ATMXT1296M1T-ATVA1 lack Smart Mutual capacitance and operate at lower temperature grades, requiring careful validation of performance and environmental specifications.