MICROCHIP ATMXT2952TD-C2U001

The mXT2952TD 1.0 uses a unique charge-transfer acquisition engine to implement Microchip’s patented capacitive sensing method. Coupled with a state-of-the-art CPU, the entire touchscreen sensing solution can measure, classify and track a number of individual finger touches with a high degree of accuracy in the shortest response time. The mXT2952TD 1.0 allows for both mutual and self capacitance measurements, with the self capacitance measurements being used to augment the mutual capacitance measurements to produce reliable touch information.

• Up to 41 X (transmit) lines and 71 Y (receive) lines for use by touchscreen and keys
• Touchscreen size 21 inches (16:9 aspect ratio), assuming a sensor electrode pitch of 6.5 mm. Other sizes are possible with different electrode pitches and appropriate sensor material
• A maximum of 2911 X/Y nodes can be allocated to the touch sensor
• Multiple touch support with up to 16 concurrent touches tracked in real time
• HID Mouse mode reporting of single touches to the host, subject to configuration
• Dual-boot OS support for Microsoft Windows and Android
• Up to 32 nodes can be allocated as mutual capacitance sensor keys (subject to other configurations)
• Adjacent Key Suppression (AKS) technology is supported for false key touch prevention
• Discrete/out-cell support including glass and PET film - based sensors
• On - cell/touch - on display support including TFT, IPS and OLED
• Synchronization with display refresh timing capability
• Support for standard (for example, Diamond) and proprietary sensor patterns (review of designs by Microchip or a Microchip - qualified touch sensor module partner is recommended)
• Works with PET or glass, including curved profiles (configuration and stack - up to be approved by Microchip or a Microchip - qualified touch sensor module partner)
• 10 mm glass (or 5 mm PMMA) with bare finger (dependent on screen size, touch size, configuration and stack - up)
• 6 mm glass (or 3 mm PMMA) with multi - finger 5 mm glove (2.7 mm PMMA equivalent) (dependent on screen size, touch size, configuration and stack - up)
• Moisture/Water Compensation - No false touch with condensation or water drop up to 22 mm diameter - One - finger tracking with condensation or water drop up to 22 mm diameter
• Mutual capacitance and self capacitance measurements supported for robust touch detection
• P2P mutual capacitance measurements supported for extra sensitive multi - touch sensing
• Noise suppression technology to combat ambient, charger, and power - line noise - Up to 240 VPP between 1Hz and 1 kHz sinusoidal waveform Up to 20 VPP between 1 kHz and 1 MHz sinusoidal waveform
• Stylus Support - Supports passive stylus with 1.5 mm contact diameter, subject to configuration, stack - up, and sensor design
• Burst Frequency - Flexible and dynamic Tx burst frequency selection to reduce EMC disturbance Configurable Tx waveform shaping to reduce emissions
• Up to 112 Hz report rate for one finger (subject to configuration)
• Typical report rate for 10 touches ≥100 Hz (subject to configuration)
• Initial touch latency < 14 ms for first touch from idle (subject to configuration) Configurable to allow for power and speed optimization
• Automatic touch sensor diagnostics during run time to support the implementation of safety critical features - Diagnostics reported using dedicated output pin or by standard Object Protocol messages - Configurable test limits
• Reports one - touch and two - touch gestures
• Supports wake up/unlock gestures, including symbol recognition
• Lens bending algorithms to remove display noise
• Touch suppression algorithms to remove unintentional large touches, such as palm
• Palm Recovery Algorithm for quick restoration to normal state
• Programmable timeout for automatic transition from Active to Idle state
• Pipelined analog sensing detection and digital processing to optimize system power efficiency
• I²C slave with support for Standard mode (up to 100 kHz), Fast mode (up to 400 kHz), Fast - mode Plus (up to 1 MHz), High Speed mode (up to 3.4 MHz)
• USB HID interface for Microsoft Windows 8.x and later versions
• HID - I²C interface for Microsoft Windows 8.x and later versions
• Interrupt to indicate when a message is available
• Additional SPI Debug Interface to read the raw data for tuning and debugging purposes
• Digital (Vdd) 3.3V nominal
• Digital I/O (VddIO) 1.8V to 3.3V (I²C mode), 3.3V (USB mode)
• Analog (AVdd) 3.3V nominal
• High voltage external X line drive (XVdd) up to 9.2V
• Operating Temperature -40°C to +85°C