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

I�C was made to communicate over short distances between printed circuit boards and is really a simple, 8-bit serial data bus. For diaphragm seal being, it isn’t only PCB-mountable pressure sensors that use the I�C signal for data transfer, but additionally pressure sensors remote from customer electronics.
Remote sensors will often have the benefit of being less sensitive to contaminated or aggressive media and having the ability to measure directly at the procedure. In the case of sensors mounted on the circuit board, the sensor element is, oftentimes, exposed right 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, as well as the pressure value, a temperature value and diagnostic information (for instance an integrity test of the info transfer) could be transmitted with a status byte.
Several pressure sensors could be connected to a bus line as ?slaves? to the client electronics that functions as a ?master?.
On the customer side, in contrast to the use of pressure sensors with analogue signals, the analogue-to-digital conversion of the pressure value for further signal processing is unnecessary since the pressure value has already been present in digital form. This contributes to faster and easier signal processing.
The electronics for communication can be constructed with standard components easily available on the market.
Often, I�C signal pressure sensors are also optimised to take less energy, making them perfect for battery-powered applications. In the WIKA portfolio, for example, this pertains to the MPR-1 pressure sensor module.
Boundary conditions by using I�C
Since I�C is not a fieldbus, long wire lengths aren’t recommended. The maximum wire length depends, in detail, on the operating environment and the corresponding disturbing influences. I�C communication 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. pressure gauge octa should also be noted that with any digitally processed signal, the response time because of discrete-time sampling will undoubtedly be somewhat slower than for an analogue, continuous signal.
Note
Your contact person will be happy to help you with any further questions on digital interfaces.
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