Touch Screen IC-GT911

 Overview

  GT911, a new-generation 5-point capacitive touch solution designed for 7” to 8” MID, consists of up to 26 Transmitter electrodes and 14 Receiver electrodes to provide higher touch accuracy.

  GT911 supports up to 5 concurrent touches with real-time tracking of accurate position and motion trajectory as well as touch area. Furthermore, it is able to report such information to the host as required.

 Features

  1. Built-in capacitive sensing circuit and high-performance MPU

     a.Report rate: 100Hz

     b.Outputs touch coordinates in real time

     c.Unified software applicable to capacitive touch screens of various sizes

     d.Single power supply, internal 1.8V LDO

     e. Flash embedded; In-system reprogrammable

     f.HotKnot integrated

  2. Capacitive touch sensor

     a.Channels: 26 (Tx channels)*14 (Rx channels)

     b.Supports capacitive touch screen sizes: 7” to 8”

     c.Supports touch key design on FPC

     d.Supports ITO glass and ITO Film

     e. Cover Lens thickness supported: 0.55mm ≦ Glass ≦ 2mm,

                                                               0.5mm ≦PMMA ≦ 1.2mm,

                                                            (For detail, please refer to Sensor Design Guidelines)

     f.Adaptive frequency hopping

     g.Supports OGS full lamination

  3. HotKnot

     a. Transmission rate：7.0 Kbps(max)

     b.Data frame maximum capacity：128 bytes

     c.Applicable sensor types: OGS/traditional GFF/GG/GF

     d.Environmental adaptability

     e.Self-calibration during initialization

     f.Automatic drift compensation

     g.Operating temperature: -40℃ to +85℃; humidity: ≦95%RH

     h.Storage temperature: -60℃ to +125℃; humidity: ≦95%RH²

  4. Host interface

     a.Standard I2C interface

     b.Works in slave mode

     c.Supports 1.8 V to 3.3 V host interface voltage

  5. Response time

     a.Green mode: <48 ms

     b.Sleep mode: <200 ms

     c.Initialization: <200 ms

  6.Power supply voltage:

     a.Single supply: 2.8 V to 3.3 V

     b.Power supply ripple:

     c.Vpp≦50 mV

  7.Package: 52 pins, 6 mm*6 mm*0.8 mm, QFN 0.4 mm Pitch

  8.Tools provided to support application development:

     a.Touch panel module parameter detector and auto-generator

     b.Touch panel module performance test tool

     c.MP Test Tool

 d.Reference driver code and documentary guide for host software development

 Block Diagram