PCAP01 Capacitance-to-Digital Converter Digital Signal Processor

The sensor data can be linearized on-chip and is provided via SPI or IIC digital serial interfaces. Additionally, the device offers IO’s for PWM/PDM signal outputs. Further IO’s can be used for interrupts, alarm level indication or for general purpose.

The sensor data can be linearized on-chip and is provided via SPI or IIC digital serial interfaces. Additionally, the device offers IO’s for PWM/PDM signal outputs. Further IO’s can be used for interrupts, alarm level indication or for general purpose.

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 6 aF at 5 Hz and 10 pF base capacitance, 17 bit resolution at 5 Hz with 100 pF base capacitance and 10 pF excitation
• High measurement rate, up to 500 kH
• Extremely low current consumption possible, down to 4 μA at 3 Hz with 13.4 bit resolution
• High stability with temperature, low offset drift (down to 30 aF per Kelvin), low gain
• Internal temperature measurement (25 mK resolution) or dedicated ports for precision temperature measurement with Pt1000 sensors (5 mK resolution)
• Serial peripheral interface (SPI compatible)
• Inter-Integrated Circuit Interface (I2C compatible)
• No need for a clock
• RISC processor core using Harvard architecture: ƒƒ48 x 48 bit RAM Data
• 4k x 8 bit volatile program memory for highspeed operation (40 to 100 MHz)
• 4k x 8 bit non-volatile (OTP) program memory
• Single power supply (2.1 to 3.6 V)
• QFN24 or QFN32 package