ITO ATB310: LOW POWER TOUCH CONTROLLER
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The ATB310 is a mixed signal chip that provides a digital interface to touch button panels that use analog piezo components.
Piezo touch interfacing is a new and exciting user interface technology that has significant advantages over both traditional mechanical buttons and other surface touch technologies such as capacitive touch sensing.
The piezo technology enables entirely new materials such as steel and leather for designers to use in their seamless user interfaces. Due to the inherent robustness of the piezo technology the user interface is vandal proof and waterproof and provides exceptional reliability in various environmental conditions.
The ATB310 is part of a family of piezo interfaces for low power applications. A similar device ATB210 is available for more cost sensitive applications that do not require ultra low power.
Supports up to 9 piezo buttons
Up to 30s duration
Event based protocol
Requires only few external components
Audio feedback to piezo speaker
Configurable delay and duration
Ultra low power: 1 μA typ.
Supply voltage 1.8 V to 3.6 V
Standard I2C (SMBus) serial communication
Serial lines are 5 V tolerant
External interrupt line for notifying the host
Open drain interrupt output
The interrupt line is 5 V tolerant
Wide operating temperature of –40 to +85 °C
Small footprint due to 24-pin QFN package