ScioSense PCap04 Capacitance-to-Digital Converters

ScioSense PCap04 Capacitance-to-Digital Converters (CDCs) feature an integrated Digital Signal Processor (DSP) for on-chip data post-processing. The converter front-end is based on the PICOCAP principle, which offers outstanding flexibility concerning power consumption, resolution, and speed. These CDCs cover a wide capacitance input range from a few femtofarads to several hundred nanofarads. The on-chip DSP allows implementing sensor algorithms like linearization and temperature compensation, with data output in a digital (SPI or I2C) or analog (PDM/PWM) way. ScioSense PCap04 CDCs feature up to six capacitors in grounded connection, three capacitors in floating connection, and an integrated guard driver. Typical applications include position, pressure, force, proximity, acceleration, humidity, inclination, angle, and level sensors.

Features

  • High flexibility
  • Up to 6 capacitors grounded and 3 capacitors floating
  • Easy adaption to various applications
  • Internal reference 1pF to 31pF
  • Internal guard driver
  • High resolution/high speed
  • On-chip DSP for sensor algorithms
  • Signal post-processing
  • 32-bit DSP
  • SPI/I2C interface
  • PDM/PWM outputs, GPIO
  • On-chip and external temperature measurement capability
  • Moisture Sensitivity Level (MSL) 3

Applications

  • Position sensors
  • Pressure sensors
  • Force sensors
  • Proximity sensors
  • Acceleration sensors
  • Inclination sensors
  • Humidity sensors
  • Dewpoint sensors
  • Tilt sensors
  • Angle sensors
  • Level sensors
  • Wireless

Specifications

  • 1pF to 100nF capacitance range
  • Up to 8aF at 2.5Hz and 10pF base capacitance
  • Up to 50kHz sample rate
  • Up to 20-bit resolution
  • 3k ROM code, 1K NVRAM
  • 96 x 32-bit RAM
  • 2.1/3V to 3.6V supply voltage
  • Operating current down to 3μA
  • Operating temperature ranges
    • -40°C to +85°C for PCap04-B
    • -40°C to +125°C for PCap04-A
  • QFN24 or die (1.588mm x 1.46mm) dimensions

Block Diagram

Block Diagram - ScioSense PCap04 Capacitance-to-Digital Converters
Đã phát hành: 2018-08-21 | Đã cập nhật: 2022-12-06