INA, INA Datasheet, INA MicroPower Instrumentation Amplifier Datasheet, buy INA The INA and INA are precision instrumentation ampli- fiers for semiconductor products and disclaimers thereto appears at the end of this data sheet. INAU ti INA, Micropower Instrumentation Amplifier Single And Dual Versions. DESCRIPTION. Details, datasheet, quote on part number: INAU .
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The main point is to have the subcircuit that you want the component to use directly as the top. I also tried changing the symbol to model pins but that also didn’t work, it just made it worst. The gain that i Should have with no resistor applyng 2V at the imput terminal should be 10V and so on, Gain 5, if I apply 1V, should be 5 and so on And the 1K’s could probably be 10K, if you want to save some current. Message 20 of Basically do the same thing you did when creating the component the first time, but just with a different starting symbol, and of course using the fixed up model that you have.
As the thermocouple produces a very low voltage, I use an INAP instrumentation amplifier to amplify the voltage. The divider one is better from an error standpoint because the offset voltage from the divider is common mode input to the amplifier, so it will be cancelled. I have also created another component, but not wroking also. Multisim components require a single “.
Message 17 of Once again thank you. So I tried to add an offset to the thermocouple input. There’s an INA model in the database that you may want to try that has these pins modeled, however, it’s not supplied by TI directly, so you’ll have to take the results with a grain of salt.
electronics – Thermocouple signal amplification using INAP – Stack Overflow
I’ve done that in two ways:. Using an Op-amp and Using a voltage divider. You can get better parts than the INA part.
Since it will be the first thing in the listing, Multisim will see an 8 pin subcircuit, which just uses the 8-pin INAP defined below which in turn uses the other two op-amp subcircuits. If I change R35, I do see a little bit of a change, but not a lot.
It looks like the model datasheef actually okay now. I must have accidentally modified the symbol without noticing when I was picking it apart to find the problem.
By the way, if it helps at all, I’m comparing by doing a parameter sweep over the resistor value using the values mentioned above. You don’t need the 10K resistor on the input, as the 1K’s will do the same function. You need to either adjust the three subcircuits so that the correct one comes first and preferably nest the other two inside it – that will be important if you want to use ina1126 than one of the component in a circuitor just wrap all three.
Message 19 of I’m also sending my file so datawheet can also have a look. It might be a little difficult to see them but you should be able to see them. I have used the AD chip successfully in the past with good results. I’m starting to think that there’s an instalation problem with my software and maybe that’s what’s causing the problem now. If you show the pin names on the schematic in the Iina126 tab of the component properties you’ll be iha126 to see the differences.
So the first circuit is more accurate. So tomorrow I’ll get it reinstalled and try your suggestions again and I’ll get back to you.
Message 14 of So, here’s the trick in this case: The text file as provided isn’t really in the format that Multisim can work with it properly. I tried your suggestion but I’m still getting the same problem: But, is the second one correct? I’ve tested with the daatasheet circuit and I found the output of ina varying with thermocouple temperature. I tried your suggestions and it didn’t work. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.