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Hi, I want to get a V input into an Arduino from a VEGA BAR14 pressure sensor which outputs mA. Yes I know I can convert to V. Texas Instruments RCV Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps parts available at DigiKey. You can make a single-supply current loop receiver with the RCV by using its 10V reference as a pseudo ground. The RCV will convert a mA loop.

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RCV420: rcv 420 offset

The problem is that I am getting an offset of about rdv420. I’ve corrected the model, see below and attached. If you have further questions related to this thread, you may click “Ask a related question” below. Content on this site may contain or be subject to specific guidelines or limitations on use. That was a simple mistake on my part. Go to Support forums. Menu Search through millions of questions and answers User.

From you first post you mention that the output is negative if the direction of fcv420 changes. That will affect the necessary connections around the RCV To convert a mA signal to a V output a TI, Wanted to add – the neg power supply had disconnected from the RCV – which resulted in the positive reading with the rc4v20 – as soon as I fixed that – was back to reading negative. A dmm will show 12v from gnd to positiv and v from gnd to negativ.

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Also in this post you mentioned that the sensor output around mA, causing the RCV output to saturate to around Ah well I’m getting nowhere I’ll just bin it.

RCV Datasheet pdf – Precision 4mA to 20mA CURRENT LOOP RECEIVER – Burr Brown

The powersupply has 3 rails. Trademarks Privacy Policy Terms of Use.

If you have further questions related to this thread, you may click “Ask a related question” below. See diagram in post 10 here. Go to Support forums. Just want to understand why you did that in your simulation model. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right.

Jan 10, 3: A mA creates a 5V to 1. Ask a related question What is a related question?


Single Supply 4-20mA Receiver with RCV420 and Fault Protection

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What is the purpose of the two capacitors in fig 8?

Does that sound somewhat unusual? Jan 9, 5: Colin, Thanks for the reply.

Do you have another question? That said, there’s something wrong with your mA sensor transmitter if it is outputting mA. First to be clear there are internal ESD diodes between the output and the supply voltage.

We are glad that we were able to resolve this issue, and will now proceed to close this thread.