XTR117: How connect the XTR117 input potantiometer?

Bekir Aslan

Prodigy 120 points

Part Number: XTR117

Hi,

I want to drive the XTR117 entry with a simple pot.

I could not find application notes and schemes in this direction.

How to connect the potentiometer in the scheme.

Aslan.

i.hizliresim.com/AGYARv.png

over 5 years ago

0 Raymond Zhang1 over 5 years ago

TI__Guru* 77521 points

Hi Bekir,

Enclosed is a XTR117 simulation, input voltage is from 0-5Vdc, output current is from 4-20mA. The output current is driving into the pot, where Vout = Iout*Pot_R.

XTR117 E2E 02242020.TSC

Please let us this will work for you.

Best,

Raymond

0 Raymond Zhang1 over 5 years ago in reply to Raymond Zhang1

TI__Guru* 77521 points

Hi Bekir,

Please use this XTR117 simulation. Other one did not simulate 0V and 4mA well. If you want use potentiometer as the input, you have to DC bias the resistor similar to input voltage from 0-5V in place of Vin source. 0V at input will give you 4mA constant output current, 5V at input will give you 20mA constant current.

.XTR117 Simulation 02242020.TSC

Best,

Raymond

0 Bekir Aslan over 5 years ago in reply to Raymond Zhang1

Prodigy 120 points

Hi,

I could not run the simulation file.

my problem is Vin 0-5V. (adjustable)

How can Vin supply be made simply?

can it be done with the potentiometer in the picture?

Best,

Aslan.

https://imgyukle.com/i/n1CtYR
i.imgyukle.com/.../n1CtYR.png

0 Raymond Zhang1 over 5 years ago in reply to Bekir Aslan

TI__Guru* 77521 points

Hi Aslan,

Enclosed is the simulation with 5kOhm potentiometer. I simulated the circuit with 0%, 50% and 99% of settings in 5kOhm, and it works ok. Please keep in mind, depending on the type of potentiometer you used, the wipe position may not be accurate, so you may not get the accurate result as the simulation.

XTR117 with potentiometer 02252020.TSC

Best,

Raymond

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XTR117: How connect the XTR117 input potantiometer?