Capacitive touch technology has developed rapidly due to its ability to support multi-touch, touch screen wear resistance, long service life and other advantages, and its products have been widely used; currently, touch chips have become the core of modern electronic products One of the components, it has a wide range of application scenarios from mobile phones, tablets, smart watches, smart door locks, to washing machines, automobiles and other fields.
The working principle of the touch chip is realized by sensing the capacitance changes caused by human touch; when the human body approaches the surface of the touch screen, it will cause the capacitance between the touch screen and the human body to change, and form a new electric field distribution. The chip will respond according to this The capacitance changes to calculate the specific touch position and operation gesture. This process requires the use of a series of advanced sensor technologies, signal processing, algorithm optimization and other technologies to achieve high precision and sensitivity.
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Touch chips usually support a wide operating voltage range and integrate high-resolution touch detection modules and dedicated signal processing circuits to ensure that the chip has sensitive automatic identification and tracking functions for environmental changes. It also has built-in special algorithms to achieve waterproofing, anti-interference and other requirements. .
The capacitive touch chip - GTX314L provided by Gongcai.com is one of the fourteen-channel GreenTouch3LPTM capacitive touch products that supports I2C interface. It has super anti-interference ability, power-off memory function, over-temperature and over-current protection, and can Withstand repeated key presses.
Product Description:
GTX314L can perform 14-channel capacitive sensing under the operation of GreenTouch3LPTM engine. The operating voltage range is: 1.8V ~ 5.5V; low power consumption; the internal control register is read and written through the I2C interface. Under the influence of various noises and environmental changes, Reliability is ensured; the CTRL pin of the GTX314L provides switchable chip ID for parallel operation of several chips on the same I2C bus.
characteristic:
●14-channel cap.sensing input
●Embedded GreenTouch3LP engine
- Analog compensation circuit
- Embedded digital noise filter
- Smart sensitivity calibration
- Low power booster
●Support I2C interface
●Provide interrupt function
●Provide slideshow mode
●Provides "register write lock" function
●Wide supply voltage range: 1.8V ~ 5.5V
●Package: QFN-24L (4.00 x4.00x0.75, e = 0.50)
South Korea's Green Core GTX314L chip uses a special integrated circuit inside, which has a high power supply voltage rejection ratio, which can reduce the occurrence of key detection errors. This feature ensures that the chip still has high reliability in applications with adverse environmental conditions and has more powerful The anti-interference ability complies with the national strong current test label and can pass high voltage test and injection current test. The effect is very obvious.
Pin definition:
Pin description:
