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      Description

ATLab¡¯s second generation touch sensor IC, DPI7 (ATA2508) provides a variety of applications with higher flexibility and better performance by new features including advanced AIC¢â, APIS¢â, touch strength output, sound generation and LED controls via I C communication. Its internal registers feature programmability to decrease hardware design complexity. Its advanced AIC¢â (Automatic Impedance Calibration) function can be easily configured to support different sensitivity between channels or to change calibration

interval or to stop/resume by a host. It also provides a strong new feature APIS¢â
(Adjacent Pattern Interference Suppression) to eliminate adjacent key or pattern interference. In addition, capabilities including touch-strength outputs, sound generation and twelve general purpose DIOs meet customer¡¯s specific requirements which give customers more flexibility and higher values.

 

      Key Features

     Patented fully digital architecture

     Twelve channels (40QFN,30SSOP), nine channels (32QFN,24SSOP) and six channels(20SSOP) available
     Programmable registers to characterize applications
     I2C for the host interface
     Different sensitivity assignment to each channel for design flexibility
     Configurable AIC¢â (Automatic Impedance Calibration)
     Eight bit resolution of touch strength data (256 step)
     APIS¢â: Mode1, Mode2, Mode3 (Adjacent Pattern Interference Suppression)
     Configurable twelve DIO pins as direct touch outputs, extended GPIOs or external interrupt inputs



      Specifications

     Touch Input Count: 12 Channel and 9 Channel

     Number of DIOs: up to 12

     Interface: I2C

     Operating Voltage: 2.5V ~ 5.5V

     Current: 0.12mA

     Response time: 0.2mSec ~ 40mSec

     ESD level: higher then 15KV(set), 8KV( Touch input, PKG)

     Calibration Configurable