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PCAP04-AQFM-24

PCAP04-AQFM-24

ScioSense
Capacitance-to-Digital Converter 20 b I2C, SPI 24-QFN (4x4)
Active1,288 in stock
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Overview

The PCAP04-AQFM-24 is a high-precision capacitance-to-digital converter (CDC) featuring an integrated 32-bit DSP for on-chip data processing. It supports a wide range of capacitance measurements from fF to nF with up to 20-bit resolution, making it suitable for high-performance sensing applications.

Why Choose This Part

This device stands out for its ultra-low power consumption of 2.3 uA at 10 kHz and its integrated 32-bit DSP, which allows for complex filtering and linearization without taxing the host MCU. The inclusion of a guard driver and internal NVRAM for configuration simplifies PCB design and increases system reliability.

Applications

Liquid Level Sensing
Utilizing its high sensitivity to detect fluid levels through non-conductive tank walls using capacitive plates.
Industrial Pressure Sensors
Interfacing with MEMS capacitive pressure sensing elements where high resolution and temperature stability are required.
Proximity and Touch Control
Implementing advanced human-machine interfaces with support for multiple sensor electrodes and guard driving.
Material Moisture Analysis
Measuring the dielectric constant changes in materials to determine moisture content in agricultural or industrial processes.

Key Specifications

Type Capacitance-to-Digital Converter
Mounting Type Surface Mount
Data Interface I2C, SPI
Package / Case 24-VFQFN Exposed Pad
Voltage - Supply 2.1V ~ 3.6V
Resolution (Bits) 20 b
Number of Channels 6
Operating Temperature -40degC ~ 125degC
Voltage Supply Source Single Supply
Supplier Device Package 24-QFN (4x4)

Getting Started

Engineers should utilize the PCAP04-EVA-KIT evaluation system to tune sensor parameters and develop DSP firmware. The device is configured via I2C or SPI, and ScioSense provides a dedicated software tool for generating the required configuration files for the internal NVRAM.

Also Consider

FDC2214 TITexas Instruments - A 28-bit resolution alternative that offers high immunity to electromagnetic interference for noise-sensitive environments.
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