ScioSense PCap04 capacitance-to-digital converter

PCap04 is a capacitance-to-digital converter with integrated digital signal processor (DSP) for on-chip data post-processing. Its front end is based on ams PICOCAP principle. This conversion principle offers outstanding flexibility with respect to power consumption, resolution and speed. PCap04 covers a wide capacitance input range. It is easy to configure the PCap04 for different capacitance measurement tasks. The on-chip DSP allows to implement sensor algorithms like linearization and temperature compensation, with data output in a digital or analog way.

Key features

• Up to 6 capacitors in grounded mode
• Up to 3 capacitors in floating mode
• Internal reference 1 to 31pF
• Integrated guarding operational amplifier

Additional features

• Up to 8 aF at 2.5 Hz and 10 pF base capacitance
• Up to 50 kHz sample rate
• 32-bit DSP
• SPI / IIC interface
• PDM / PWM outputs, GPIO
• Supply voltage 2.1/3.0 to 3.6 V (integrated 1.8 V regulator)
• QFN-24, WLCSP or dice

Applications

• Humidity sensors
• MEMS
• Motion sensors
• Proximity switches and sensors
• Bio-medical sensors