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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Mentions Tags More Cancel. And, yes; regarding the negative output; from the circuit diagram I expected to see negative for a negative flow; but since it didn’t explicitly say that in the actual specs. Sep 9, 2: This is covered in the “Theory of Operation” section of the datasheet.
Jan 10, 9: If you have a related question, please click the ” Ask a related question ” button in the top right corner. TI, Wanted to add – the neg power supply had disconnected from the RCV – which resulted in the positive reading with the simulator fcv420 as soon as I fixed that – was back to reading negative.
The output goes zero for 0 mA. The middle point is gnd. Use of the information on this site may require a license from a third party, or a license from TI.
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In the fifth post it mentions internal diodes and why they were not included in this device. We are glad that we were able to resolve this issue, and will now proceed rrcv420 close this thread.
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I want to combine the overload protection for the RCV as showed in http: From you first post you mention that the output is negative if the direction of current changes.
Not sure why you think adding this chip would be better. Since it is basically still a difference amplifier if you change the polarity of the input signal then the output signal will change polarity rcv240 well.
In the later post is sounds like you had a connection issue so I’ll disregard this comment. This is an example. To convert a mA signal to a V output a Go to Support forums. Menu Search through millions of questions and answers User.
You need a dual symetric 12volt regulated power supply for that chip. Can I use the same 24v supply I am using for the sensor, with a common ground? Ah well I’m getting nowhere I’ll just bin it.
No license, either express or implied, by estoppel or otherwise, is granted by TI. A simple 51ohm current to voltage resistor and measured with Arduino’s internal 1. Your third post mentions the connection issues in the 2nd post. The problem is that I am getting an offset of about 1. If current is flowing the opposite was as intended – is this ‘normal’? Ask a new question Ask a new question Cancel. The powersupply has 3 rails. In the second post you mention that you achieved a positive output signal, but it wasn’t correct.
All content and materials on this site are provided “as is”. Thanks, useful to know. If you have further questions related to this thread, you may click “Ask a related question” below.
Thanks Again, John W. Menu Search through millions of questions and answers User.
Content on this site may contain or be subject to specific guidelines or limitations on rcvv420. The XTR is a two-wire mA transmitter which must be allowed to float relative to system GND in order for the part to regulate its internal voltages as necessary for correct current transmission.
Best regards, Ian Williams. Mentions Tags More Cancel. The over-range comparator is set 24mA and the under-range comparator is set at 2mA.
Mentions Tags More Cancel. Then mentions you’re measuring the input impedance using an Ohmmeter and you rcv20 a result in Volts? Ask a related question What is a related question?