Touch IC

1.GT9271 Overview

10-Point Capacitive Touch Controller for MID

GT9271, a new-generation 10-point capacitive touch solution designed for 7” to 10.1” portable devices, consists of up to 32 Transmitter electrodes and 20 Receiver electrodes to provide higher accuracy and resolution.

GT9271 supports up to 10 concurrent touches with real-time tracking of accurate position and motion

routes as well as touch area. Moreover, it can report such information to the host as required.

2. GT9271 Features

 Built-in capacitive sensing circuit and high-performance MPU

• Report rate: 100Hz
• Outputs touch coordinates in real time
• Unified software applicable to capacitive touch screens of various sizes
• Single power supply, internal 1.8V LDO
• Flash embedded; In-system reprogrammable
• HotKnot embedded

 Capacitive touch sensor

• Channels: 32 (Tx channels)*20(Rx channels)
• Supports capacitive touch screen sizes: 7” to 10.1″ (diagonal)
• Supports touch key design on FPC
• Supports ITO glass and ITO Film
• Cover Lens thickness supported: 0.55mm ≦ Glass ≦ 2mm,

0.5mm ≦ Acrylic ≦ 1.2mm,

• Supports OGS full lamination

 HotKnot

• Transmission rate：7.0Kbps(max)
• Data frame maximum capacity：128 byte
• Applicable sensor stackups: OGS/conventional, GFF/GG/GF

 Environmental adaptability

• Self-calibration during initialization
• Automatic drift compensation
• Operating temperature: -40℃ to +85℃; humidity: ≦95%RH
• Storage temperature: -60℃ to +125℃; humidity: ≦95%RH

 Host interface

• Standard I2C interface
• Works in slave mode
• Supports 1.8V to 3.3V host interface voltage

 Response time

• Green mode: <48ms
• Sleep mode: <200ms
• Initialization: <200ms

 Power supply voltage:

• Single supply: 2.8V to 3.3V

 Power supply ripple:

• Vpp≦50mV

 Package: 68 pins, 8mm*8mm*0.8mm QFN

 Tools that support application development:

• Touch panel parameter detector and generator
• Touch panel performance tester
• Mass production test kit
• Reference driver code and documentary guide for host software development

Application

Smart devices such as mobile phones, tablets, laptops

AIoT devices such as wearables, hearables, smart home

Automobile screens, factory-installed products and aftermarket installed products

Industrial devices