DollaTek 5Pcs MPR121 Breakout V12 Proximity Capacitive Touch Sensor Module

• Low power operation.
• 1.71V to 3.6V supply operation.
• 29μA supply current at 16 ms sampling interval period.
• 3μA Stop mode current.
• 12 capacitance sensing inputs.

The MPR121 also has eight LED control pins. When these pins are not configured as electrodes, they can be used to drive LEDs. There are four jumpers at the bottom of the array, all of which are set (closed) by default. An address jumper connects the ADD pin to ground, which means that the chip's default I2C address will be 0x5A. If you need to change the chip address (shortening ADD on another pin), be sure to open the jumper first. The jumpers also connect SDA, SCL and the interrupt pin to 10k return resistors. If you do not need the booster resistors, you can open the jumpers by cutting the trace that connects them. There is no regulation on the board, so the supplied voltage should be between 2.5 and 3.6 VDC. The VREG pin is connected to ground via a 0.1 µF capacitor. That is, you can not use the MPR121 in low voltage mode (1.71-2.75VDC), unless the array is changed. Features: Low power operation Operation in power supply from 1.71 V to 3.6 V. 29 μA supply current at a sampling interval period of 16 ms. 3 μA in the process of shutdown mode. 12 capacitance sensing inputs 8 inputs are multifunctional for LED driver and GPIO. Full Touch Detection Automatic configuration for each detection input. Auto-calibration for each detection input. Touch threshold/release and anti-bounce for touch detection. I2C interface, with interrupt output. MPR121: 3mm x 3mm x 0.65mm Operating temperature range from -40°C to +85°C. Package includes: 5 x DollaTek 5pcs MPR121 Proximity Touch Capacitive Sensor Module V12