FDC2112

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community FDC2212, FDC2214, FDC2112, FDC2114 SNOSCZ5A – JUNE 2015 – REVISED JUNE 2015 FDC2x1x EMI-Resistant 28-Bit,12-Bit Capacitance-to-Digital Converter for Proximity and Level Sensing Applications 1 Features 1 EMI-Resistant Architecture Maximum Output Rates (one active channel): – 13.3 ksps (FDC2112, FDC2114) – 4.08 ksps (FDC2212, FDC2214) Maximum Input Capacitance: 250 nF (at 10 kHz with 1 mH inductor) Sensor Excitation Frequency: 10 kHz to 10 MHz Number of channels: 2, 4 Resolution: up to 28 bits System Noise Floor: 0.3 fF at 100 sps Supply Voltage: 2.7 V to 3.6 V Power Consumption: Active: 2.1 mA Low-Power Sleep Mode: 35 uA Shutdown: 200 nA Interface: I2C Temperature range: -40°C to +125°C 2 Applications Proximity Sensor Gesture Recognition Level Sensor for Liquids, including Conductive ones such as Detergent, Soap, and Ink Collision Avoidance Rain, Fog, Ice, Snow Sensor Automotive Door and Kick Sensors Material Size Detection 3 Description Capacitive sensing is a low-power, low-cost, highresolution contactless sensing technique that can be applied to a variety of applications ranging from proximity detection and gesture recognition to remote liquid level sensing. The sensor in a capacitive sensing system is any metal or conductor, allowing for low cost and highly flexible system design. The main challenge limiting sensitivity in capacitive sensing a...