PCAP02 Capacitance-to-Digital Converter

The PCAP02 works with both grounded and floating single and differential sensors. Ground capacitors mitigate for stray capacitance inside the chip. Floating capacitors compensate for both internal and exterior stray capacitances. A pre-charge cycle increases the utility of MEMS sensors while simultaneously providing short-circuit safety. Temperature can be sensed using either internal or external thermistors (platinum or others). The chip requires firmware to process the raw measurement data and transform it into appropriate results.

ScioSense offer two versions of open-source firmware, one for pure compensates capacitance ratios and one for fully linearized and temperature compensated results.

FEATURES

• Wide Input Range (fF to nF)
• Low Noise (15 aF rms)
• High Update Rate up to 500 kHz
• Low Current Consumption down to 2 uA
• Internal Signal Processor

BENEFITS

• Enables Platform Designs (one part – different configurations)
• Enables Compact Designs Due to Internal Signal Processor
• Allows for Low Power Designs (Example, wireless applications)
• Enables Multi-Channel Designs (up to 8 sensors)