DESCRIPTION

· The FDC2x1x is a multi-channel, high-resolution capacitance-to-digital converter designed for capacitive sensing applications.

· It employs a resonant sensing architecture that maintains performance even in the presence of fluorescent light.

· The device supports a wide excitation frequency range, offering flexibility in system design, especially for sensing conductive liquids.

· The FDC221x series is optimized for high resolution up to 28 bits, while the FDC211x series offers a fast sample rate up to 13.3kSPS.

· It allows for the use of remote sensors and can track environmental changes over time.

FEATURES

· EMI-resistant architecture ensures reliable operation in noisy environments.

· Maximum output rates: 13.3kSPS (FDC2112, FDC2114), 4.08kSPS (FDC2212, FDC2214).

· Maximum input capacitance: 250nF at 10kHz with 1mH inductor.

· Sensor excitation frequency range: 10kHz to 10MHz.

· Number of channels: 2 or 4.

· Resolution: up to 28 bits.

· System noise floor: 0.3fF at 100SPS.

· Supply voltage: 2.7V to 3.6V.

· Power consumption: active: 2.1mA, low-power sleep mode: 35µA, shutdown: 200nA.

· Interface: I2C.

· Temperature range: –40°C to +125°C.

APPLICATIONS

· Proximity sensing for detecting objects without physical contact.

· Gesture recognition for user interface applications.

· Level sensing for liquids, including conductive ones like detergent, soap, and ink.