TTP229 16-Channel Capacitive Touch Digital keypad Module

This is TTP229 16-Way Capacitive Touch Switch Digital Touch Sensor Keypad Module.

This capacitive touch sensor module uses the TTP229 integrated circuit, making it easy to add capacitive touch input to your project. It features 16 sensitive touch pads that make an ideal replacement for the old fashioned keypads.

Capacitive touch allows electronics to sense when your finger is within a few millimeters of a surface to simulate a button “press” just like how the pushbutton works. Capacitive sensing may be used in any place where low to no force human touch sensing is desirable.

This is a 16 switch based easy to use capacitive touch sensing module, This 16 switch digital touch sensor module is based on a touch sensing IV TTP229. This device has a built-in regulator for the touch sensor. We can add interfaces through the non-conductive dielectric material.

TECHNICAL SPECIFICATION

• Operating voltage 2.4V to 5.5V
• Built-in Voltage regulator
• Stand-by current at 3V: 0.25uA at 8 Hz Sampling Rate
• Operating current 2.5uA typically in 16-key mode. Operating current 2.0uA for 8-key mode.
• Stable touch detection of the human body
• 16-channel maximum touch key sensing
• Two different operating modes: independent 8 Channel O/P and I2C interface 16 Key Mode
• 2 wires I2C interface for both 16 key and 8 key mode
• Onboard LEDs to indicate which pad is being touched
• 2 Wires serial interface can select active high or low by option
• Provides two kinds of sampling rate: slow sampling rate 8Hz and fast sampling rate 64Hz
• Optional maximum key-on time about 80sec
• Auto calibration at power-up (keypad must not be touched for 0.5 seconds after power-up)