DESCRIPTION

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

· It employs a resonant sensing architecture to maintain performance even in noisy environments like fluorescent light.

· The device supports a wide excitation frequency range (10kHz to 10MHz), enabling flexible system design.

· It is suitable for proximity sensing, gesture recognition, and liquid level sensing, including conductive liquids like detergent, soap, and ink.

· The FDC221x series offers up to 28-bit resolution, while the FDC211x series provides a fast sample rate of up to 13.3kSPS.

· It supports remote sensors and can track environmental changes like temperature and humidity.

FEATURES

· EMI-resistant architecture for reliable performance.

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

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

· Resolution: up to 28 bits.

· System noise floor: 0.3fF at 100SPS.

· Supply voltage: 2.7V to 3.6V.

· Low power consumption: active mode (2.1mA), sleep mode (35µA), shutdown (200nA).

· Interface: I2C.

· Operating temperature range: -40°C to +125°C.

APPLICATIONS

· Proximity sensing.

· Gesture recognition.

· Liquid level sensing for both non-conductive and conductive liquids (e.g., detergent, soap, ink).