PICOCAP PCAP02 FEATURES

Capacitance-to-Digital Converter with Integrated Signal Processor

FEATURES

• Up to 8 capacitances in grounded mode
• Up to 4 capacitances in floating mode (potential-free and with zero bias voltage)
• Compensation of internal (grounded) and external parasitic capacities (floating)
• High resolution: Up to 23 aF at 5 Hz and 10 pF base capacitance (corresponds to 18.7 bits resolution)
• High measurement rate, up to 500 kHz
• Extremely low current consumption possible, down to 2 µA at 3 Hz with 13.1 bit resolution
• Internal temperature measurement (25 mK resolution) or dedicated ports for precision temperature measurement with Pt1000 sensors (5 mK resolution)
• Serial peripheral interface (SPI compatible), now with multi-slave capability
• Inter-Integrated Circuit Interface (I2C compatible), now with auto-increment
• Integrated reference capacitor (1pF to 31pF)
• Enlarged set of discharge resistor up to 1 MOhm (for humidity sensors)
• Two internal discharging resistor sets to operate two different sensors (Combo sensors)
• Pre-Charge option for slow charging to reduce mechanical stress (for MEMS sensors)
• Integrated low-power clock and high-speed oscillator
• Self-test capability for differential sensors (for e.g. MEMS)
• RISC processor core using Harvard architecture: ƒƒ80 x 48 bit RAM Data
• 4k x 8 bit volatile program memory for highspeed operation (40 to 85 MHz)
• 4k x 8 bit non-volatile (OTP) program memory
• Integrated 128 bytes EEPROM for calibration data
• PDM and PWM output up to 16 bit
• Single power supply (2.1 to 3.6 V)
• QFN32 package or Dice