캐패시턴스 디지털 컨버터 -PCAP04
(CDC CLICK)
개요
- 본 제품은 캐패시턴스 디지털 컨버터 -PCAP04 입니다.
- capacitance-to-digital converter (CDC) PCAP04을 기반으로 디자인된 제품입니다.
- 온칩 데이터 처리를 위해 DSP를 내장하고 있습니다.
- 그라운드된 캐패시터와 플로팅 캐패시터를 디지털 포맷으로 변환할 수 있게 하여 줍니다.
- 20비트 분해능에 50Khz 샘플링 레이트를 가지고 있습니다.
특징
- CDC Click is a compact add-on board that allows your application do a conversion of capacitance to a digital format. This board features the PCAP04, a capacitance-to-digital converter (CDC) from ScioSense. It also includes an integrated digital signal processor (DSP) for on-chip data post-processing. The converter has high flexibility and allows you to convert grounded capacitors and floating capacitors to a digital format. It has up to 50KHz sampling rate in up to 20-bit resolution. This Click board™ makes the perfect solution for the development of measuring devices, industrial applications, sensitive equipment, and more.
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HOW DOES IT WORK?
CDC Click is based on the PCAP04, a capacitance-to-digital converter from ScioSense. It covers a wide capacitance input range from a few femtofarads to several hundreds of nanofarads. Configuring the PCAP04 for different capacitance measurement tasks, such as single and differential sensors in grounded or floating connections, is easy. The CDC Click is pre-assembled with 10pF capacitors on the PC0 – PC5 header to emulate capacitive sensors. They are connected as single sensors in floating mode. There is a GND connector for connecting the capacitive sensors in grounded mode. The typical value of the capacitive sensors that can be connected is in the range of 30pF to 3.5nF.
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The PCAP04 has four general-purpose input/output pins (PG prefix) and can be used as pulse-density/pulse-width modulation outputs. The PCAP04 features the RDC (resistance-to-digital converter) as well. The RDC unit is mainly intended for measuring temperature, using an internal sensor and reference, or using external resistors like the PT1000 onboard. You can, however, connect an external sensor over the PT1 and PTO connectors or any other resistance element. The DSP takes information from both the CDC and RDC, processes it, and makes it available to the host MCU. You can also add another temperature sensor or temperature reference on RT2. The auxiliary port (PCAUX – PCA on CDC Click) can be used for external compensation capacitance or external discharge resistor and guarding port. You can make a selection by soldering an R7 jumper.
CDC Click can communicate with the host MCU using a standard I2C interface or a 4-wire SPI serial interface. The selection can be made over the COMM SEL jumpers. The I2C is set by default and supports up to 100kHz of the bus frequency clock. The SPI clock frequency is up to 20MHz.
This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
Type Capacitive Applications Can be used for the development of measuring devices, industrial applications, sensitive equipment, and more On-board modules PCAP04 - capacitance-to-digital converter from ScioSense Key Features Capacitance-to-digital converter, resistance-to-digital converter, high flexibility, ultra-low power, high resolution, high speed, on-chip DSP for sensor algorithms, on-chip and external temperature measurement capabilities, and more Interface I2C,SPI ClickID Yes Compatibility mikroBUS™ Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V
문서
연관제품
- 연관제품 1
