PCAP04-ASDF

ADCs/DACs - Special Purpose Overview

The PCAP04-ASDF is a specialized capacitance-to-digital converter (CDC) from ScioSense, part of the PICOCAP family. It integrates a 32-bit CPU and digital signal processor for on-chip data post-processing, including linearization and temperature compensation. The device supports up to six capacitive channels in grounded mode or three in floating mode, with an input range spanning from femtofarads to hundreds of picofarads. It operates on a single supply voltage between 2.1V and 3.6V and features I2C and SPI digital interfaces. The component is housed in a 24-VFQFN package and functions within a temperature range of -40°C to +125°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 32-bit CPU and DSP for sensor algorithms like linearization and temperature compensation
• Supports up to 6 capacitive channels in grounded mode or 3 in floating mode
• Wide capacitance input range from several fF to hundreds of pF
• Digital output via SPI/I2C and analog output via PDM/PWM

ADCs/DACs - Special Purpose Applications

• Density and level sensors
• Humidity sensing
• Capacitive touch applications

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'ASDF' against official ScioSense documentation, as standard listings often use suffixes like 'AQFT'. Confirm availability status, as some variants may be discontinued or subject to supply limitations. Ensure the ordering code matches the required interface and package configuration for your design.

ADCs/DACs - Special Purpose Selection Notes

Select this component when high-resolution capacitance measurement with integrated signal processing is required. Consider the 24-QFN package constraints and verify that the 2.1V to 3.6V supply range aligns with the system power architecture. Evaluate the need for internal vs. external reference capacitors based on the target resolution and speed requirements.

ADCs/DACs - Special Purpose Part Context

The PCAP04 belongs to ScioSense's PICOCAP series of capacitance-to-digital converters. It is designed for applications requiring precise measurement of small capacitance changes. The device distinguishes itself by combining high-resolution ADC functionality with embedded processing capabilities, reducing the burden on the main system microcontroller.

ADCs/DACs - Special Purpose FAQ

What is the maximum sampling rate of the PCAP04?

The PCAP04 supports a maximum sampling rate of up to 50,000 SPS.

Does the PCAP04 support differential measurements?

Yes, the device can be configured for differential measurements, supporting up to 3 capacitive channels in floating mode.

What types of output interfaces are available?

The PCAP04 provides digital output via SPI and I2C, as well as analog output options using PDM or PWM signals.