Touch IC

1.Overview of GA6872

10-point Capacitive Touch Controller for Automotive Electronics Solutions

GA6872 is designed for the displays up to 12.3” (8:3 and pitch<5.5mm) or up to 15.6” (16:9 and pitch<6.5mm) in automotive electronics market. The Tx channels can be multiplexed in long strip display applications, such as the application of 16.2” (Length:400mm; Width:110mm) long strip display. It contains 37 transmitter channels and 47 receiver channels to provide real-time and accurate position authentication, movement track and touch area of 10 touch points. In addition, it features with excellent noise immunity and supports functions such as thick cover, waterproof, gloves input, and touch keys

2. GA6872 Features

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

 AEC-Q100 Grade 2

 IATF 16949

 Report rate: finger touch, 250Hz(Max.)

 High-voltage drive signal output, high SNR

 Supports Mul-cap and Sel-cap detection

 Outputs touch coordinates or capacitance test result in real time

 Flash embedded, in-system reprogrammable

 Unified software applicable to mutual capacitive touch sensors of various sizes

 Capacitive touch sensor

 Channels: 37Tx *47 Rx, 9 channels can be converted to each other, that is, the channels can be

converted into 35T×49R/33T×51R/31T×53R/29T×55R/28T×56R

 Capacitive touch sensor sizes: ≤12.3” (8:3 and pitch<5.5mm) or ≤15.6” touch displays (16:9

and pitch<6.5mm)

 Supports PG/GG/GF2/GFF/OGS/Oncell displays

 Supports rigid display Oncell, Amoled Outcell and LCD display

 Supports 10 touch keys

 Supports thick cover

 Supports glove input

 Supports Hover function

 Supports AD temperature detection function

 Various GPIO ports: support backlight, PWM sound feedback and other function

 Smart wake-up

 Environmental adaptability

 Self-calibration during initialization

 Operating temperature: -40℃~+105℃

 Storage temperature: -60℃~+150℃

 ESD: HBM 5kV

 Communication interface

 I 2C: 400KHz(Typ.), work as slave

 Supports IIC Master interface

 Supports 1.8V to 3.3V host interface voltage

 Power supply voltage:

 Power supply (Typ.): AVDD/DVDD1833:2.8V/3.0V/3.3V

 Package: 176PINS, LQFP_20×20 mm, pitch0.4mm

 Tools that support application development:

 Touch panel parameter detector and generator

 Touch panel performance tester

 Mass production test kit

 Reference driver code and guidance files for host-side software development