FDC2112 - Texas Instruments

FDC2112 Capacitance-to-Digital Converter

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 m.

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 Liquid.