Pressure sensor with I�C communication ? possibilities and boundary conditions

I�C was designed to communicate over short distances between printed circuit boards and is really a simple, 8-bit serial data bus. For the time being, it isn’t only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but also pressure sensors remote from customer electronics.
Remote sensors usually have the benefit of being less sensitive to contaminated or aggressive media and having the capacity to measure directly at the procedure. Regarding sensors mounted on the circuit board, the sensor element is, oftentimes, exposed directly to the medium. With remote sensors, steel or ceramic generally serve because the wetted surface.
I�C circuit
The I�C bus, alongside both supply lines, requires only two further lines:
SCL (serial clock line)
SDA (serial data line)
Additional possibilities through I�C
The I�C bus is a well-known standard in electronics, offering additional possibilities for communication with a pressure sensor than having an analogue signal:
In the data protocol, in addition to the pressure value, a temperature value and diagnostic information (for example an integrity test of the data transfer) can be transmitted with a status byte.
Several pressure sensors could be linked to a bus line as ?slaves? to the client electronics that functions as a ?master?.
On the client side, as opposed to the use of pressure sensors with analogue signals, the analogue-to-digital conversion of the pressure value for further signal processing is unnecessary because the pressure value has already been within digital form. This plays a part in faster and easier signal processing.
The electronics for communication could be constructed with standard components easily available on the market.
Often, I�C signal pressure sensors are also optimised to consume less energy, making them ideal for battery-powered applications. In the WIKA portfolio, for instance, this applies to the MPR-1 pressure sensor module.
Boundary conditions with the use of I�C
Since I�C is not a fieldbus, long wire lengths aren’t recommended. The utmost wire length depends, in detail, on the operating environment and the corresponding disturbing influences. I�C Blissful is most beneficial used in projects where in fact the pressure sensor or the pressure sensor module is integrated into the customer product and thus protected against external influences. It will also be noted that with any digitally processed signal, the response time because of discrete-time sampling will be somewhat slower than for an analogue, continuous signal.
Note
Your contact person will undoubtedly be happy to help you with any more questions on digital interfaces.
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2 thoughts on “Pressure sensor with I�C communication ? possibilities and boundary conditions”

  1. Le courrier électronique n’est pas sûr et il peut y avoir des maillons faibles dans le processus d’envoi, de transmission et de réception des courriers électroniques. Si les failles sont exploitées, le compte peut être facilement piraté.

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