Analog IC / Capacitive Sensing (screen)

IT7257: Self-Cap Touch Controller for Wearable Device

The IT7257 is a 13/22-channel capacitance sensor detection controller companioned with one ITO film screen
module to implement multi-touch functionality. It integrates one single electrode 13/22-channel
capacitance-to-digital converter (CDC), one high performance low-power-consumption RISC CPU, flexible
memory support, and many powerful hardware functions. The internal CDC has one automatic calibrate and
compensates engine to remove effect from environmental change.

The IT7257 supports I2C interface only. The serial interface is to communicate with the host.

The IT7257 is available in 24/32-pad XQFN package. It needs one power 2.8V-3.3V source, and IO voltage
level can operate at 1.8V-3.3V.

 

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