ATMXT1296M1T-AVA2

Overview

The ATMXT1296M1T-AVA2 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, providing a signal-to-noise ratio improvement of 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.

Feature Summary

• Supports Microchip Knob-on-Display technology for detecting detent positions of capacitive mechanical rotary encoders.
• Includes encrypted configuration parameters and touch coordinate reports using customer-defined security keys.
• Features automated PWM generation for display backlight control, audible speaker output, or haptic feedback.
• Provides two general-purpose ADC pins for temperature and voltage monitoring in single-ended or differential modes.

Applications

• Automotive infotainment systems requiring robust multi-touch interaction.
• Displays utilizing on-cell OLED or LCD technologies with non-rectangular sensor designs.
• Interfaces integrating capacitive mechanical rotary knobs with touch panels.
• Applications demanding high noise immunity via Smart Mutual capacitance sensing.

Procurement Notes

Verify the specific variant requirements against the Feature Summary table, as the 'T' suffix indicates a single communication interface without device encryption or ASIL-B readiness compared to other family members. Confirm that the 128-lead TQFP package aligns with the target PCB land pattern specifications provided in the datasheet. Ensure the design accounts for the Grade 2 operating temperature range of –40°C to +105°C.

Selection Notes

Select this model when a single primary host interface (I2C or SPI) is sufficient for system architecture. Note that this variant lacks the secondary communication interface, device encryption, and dedicated hardware self-tests found in the 'E' variants. It is suitable for applications where cost optimization or simplified interface routing is prioritized over advanced functional safety certifications like ASIL-B readiness.

Part Context

This component belongs to the ATMXT1296M1 Family of maXTouch controllers. It shares the core 72-sense-line architecture and Smart Mutual acquisition capabilities with variants like the ATMXT1296M1E. The 'T' designation specifically denotes the single-interface configuration, while 'AVA2' identifies the specific product variant code and qualification status within the ordering system.

Replacement Considerations

Direct replacements include other ATMXT1296M1T variants such as ATMXT1296M1T-ARVA2 if tape and reel packaging is required instead of tray. For designs needing dual interfaces or encryption, consider upgrading to the ATMXT1296M1E series. Legacy versions like ATMXT1296M1T-ATVA1 are not recommended for new designs due to older firmware and lower temperature grades.