MTCH112双通道接近/触摸控制器

　　The Microchip mTouch™ sensing MTCH112 DualChannel Proximity/Touch Controller provides an easy way to add proximity and/or touch sensor detection to any application. The device implements either two capacitive sensors or one sensor and one active guard driver. The optional device configuration through I2C™ allows presets to be loaded in a production environment. Automatic calibration routines are used by default to choose the best options， so user configuration is not required. The MTCH112 uses a sophisticated optimization algorithm to actively eliminate noise from the signal. While the noise level is being measured， the requirements for a proximity or touch detection are updated to reflect the degree of uncertainty in the readings. When a press is detected for the first time， the threshold is automatically calibrated to choose a smart threshold for the ‘release’ and next press. This creates a system that dynamically optimizes the signalto-noise ratio for its environment.