Touch key Controller
Features
Super anti-EMC interference, can prevent the antennas of transmitting equipment such as walkie-talkies with power up to 5W from being close to the touch point from interfering.
Extremely simple peripheral circuit, the simplest application only requires a reference capacitor. (Depending on customer requirements, if you need to improve ESD and EMC, you need to connect a resistor to each button).
Water-proof and flood-resistant, patches of water droplets covering the touch panel will not affect the effective recognition of the keys.
Ultra-wide operating voltage range 3.0V-5.5V, can be used in currently widely used 3.3V systems and 3.0V battery systems.
Power supply voltage change adaptation function, built-in voltage compensation circuit, automatically compensates when the power supply voltage changes within the working range, without affecting the normal operation of the chip.
Automatically adapt to changes in ambient temperature and humidity, and the application of slow environmental adaptation technology allows the chip to work continuously for an unlimited time without any sensitivity differences.
Adjustable sensitivity, the sensitivity can be adjusted by external capacitor capacity to adapt to different designs.
Provides a binary code direct output interface to facilitate user system docking.
Quick initialization after power-on. Within about 300mS, the chip can detect environmental parameters including automatic adaptation, and the key detection function starts to work.
Sensitivity automatically adapts. If the parasitic capacitance of each key lead is different due to different lengths, it can automatically detect and adapt to the same sensitivity of different keys.
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