Digital Capacitive Sensor Interface

Overview

Key Features

• Trimmable input capacitance range, for flexibility and dynamic range optimization
• Wide operating temperature range: -40 to 125°C
• Extended operating supply voltage range: 1.71 to 3.6V
• Internal high-accuracy and low-drift temperature sensor with very low RMS noise: 0.01°C @14-Bit resolution
• Low RMS capacitance noise (1pF input range): 0.4fF @ 14-Bit resolution
• On-chip processing engine for linearization and temperature
• compensation – provides the end-user with a fully calibrated output
• Programmable resolution settings for each measurement mode:
• 8 to 14-Bit for the temperature sensor and the capacitance interface
• Update mode with programmable update rates from 5ms to 5s
• Calibrated analog output features, for both the capacitance and temperature
• sensors
• Ultra-low sleep current: 10nA
• 2-wire Digital I2C bus interface
• Fully calibrated analog outputs for both temperature and capacitance measurements
• Two programmable alarm outputs.

Applications

• Pressure, Humidity, and
• Temperature Monitoring
• Home Automation Control
• VAC / VAV
• Pressure Transmitters
• IoT Environmental Sensing
• Level Sensing

Technical Specifications