Capacitive sensing with grounded capacitor sensors is a very low-power, low-cost, high-resolution contact-less sensing technique that can be applied to a variety of applications ranging from proximity sensing and gesture recognition to material analysis and remote liquid level sensing. The sensor in a capacitive sensing system is any metal or conductor, allowing for low cost and highly flexible system design.
The FDC1004 is a high-resolution, 4-channel capacitance-to-digital converter for implementing capacitive sensing solutions. Each channel has a full scale range of ±15pF and can handle a sensor offset capacitance of up to 100pF, which can be either programmed internally or can be an external capacitor for tracking environmental changes over time and temperature. The large offset capacitance capability allows for the use of remote sensors.
The FDC1004 also includes shield drivers for sensor shields, which can reduce EMI interference and help focus the sensing direction of a capacitive sensor. The small footprint of the FDC1004 allows for use in space-constrained applications. The FDC1004 is available in a 10-pin WSON and VSSOP package and features an I2C interface for interfacing to an MCU.
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El módulo de evaluación FDC1004 se usa para evaluar el convertidor capacitivo a digital FDC1004 de 4 canales. Los módulos de evaluación presentan una placa de circuito impreso (PCB) divisible compuesta por tres secciones: un convertidor USB a I²C basado en el microcontrolador MSP430F5528, el (...)
This reference design uses our capacitive-to-digital converter technology to provide a high-precision method to wake up systems when human interaction occurs. TIDA-00220 demonstrates techniques for an alternative sensor design, environmental compensation and electromagnetic interference protection.
Este diseño de referencia, que utiliza FDC1004EVM, proporciona una detección de nivel de líquido capacitiva robusta y precisa. TIDA-00317 demuestra el diseño y la configuración del sensor para mitigar las interferencias de capacitancia parásitas del entorno del sistema.
This system conserves power and extends backlight life by dynamically adjusting the backlight brightness relative to the environment's ambient light. A capacitive proximity sensor wakes up the system when a user is close to save even more power.
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This reference design showcases proximity sensitivity using our FDC1004 evaluation module (EVM) for an automotive kick-to-open application within a plastic bumper. This design also showcases test results that include exposure to mud and water on the bumper to determine the impact of common (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| WSON (DSC) | 10 | Ultra Librarian |
| VSSOP (DGS) | 10 | Ultra Librarian |
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