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Capacitance-to-Digital Converter with Integrated Signal Processor

The PCap02 is a low power capacitance to digital converter and offers a high degree of flexibility. The advantages known from the patented PICOCAP concept are still prevalent. For example, the wide input range from a few fF up to a several hundred of nF and the versatile possibilities to configure the chip to achieve a high measurement rate up to 500,000 Hz or a low current consumption of only a few µA.

The PCap02 can be configured for highest sampling rates up to 500 kHz, lowest current consumption down to 2 uA or lowest noise of 15 aF (rms). The internal signal processor allows for power efficient and fast calculations, e.g. for sensor linearization or complex arithmetrics.

Block Diagram for the PCap02 Capacitance to Digital Converter

Key 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

Key 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)

PCap02 Product Facts

Channels 8
Noise 15 aF @ 10pF
Max. Rate 500000
Operating Supply Range 2.1 to 3.6
Interface SPI, I2C, PDM, PWM
CPU 48-bit
Memory 4k OTP
Ambient Temperature Range [°C] -40°C to +125°C
Package QFN32