XTR116: XTR116 measuring problem

Yasin ALYAPRAK

Part Number: XTR116

Hi ,

I created the circuit below :

I can control between 16-20 ma normally.
On the DAC side, I can monitor that the voltage is between 0-4095.No problem. But I have never seen less than 16ma. And I can see VCOMPLIANCE more than +7.5 V.

Where am I doing wrong. ?Thank you.

over 5 years ago

0 kai klaas69 over 5 years ago

Guru 140200 points

Hi Yasin,

the XTR116 can only deliver a current of < 3.7mA at pin 8. How much current do you draw?

Kai

0 Luis Chioye over 5 years ago in reply to kai klaas69

TI__Guru 55466 points

Hi Yasin,

As Kai has mentioned, the minimum output current of the XTR116 is the quiescent current consumption of the XTR116 and the consumption of the complete two-wire driver circuit.

Please review the blog below.

2-Wire 4-20mA Sensor Transmitters: Sensor and Transmitter Current Consumption Limitations (Part 3)

https://e2e.ti.com/blogs_/b/precisionhub/archive/2015/01/13/two-wire-4-20ma-transmitters-background-and-common-issues-part-3

Thank you and Regards,

Luis

0 Yasin ALYAPRAK over 5 years ago in reply to Luis Chioye

Prodigy 30 points

Thank you for reply. I have solved .

0 kai klaas69 over 5 years ago in reply to Yasin ALYAPRAK

Guru 140200 points

Hi Yasin,

may I ask, how you did solve it?

Kai

0 Yasin ALYAPRAK over 5 years ago in reply to kai klaas69

Prodigy 30 points

I realized that digital ısolator was drawing too much current.I removed the isolator.After that It is work perfectly

0 kai klaas69 over 5 years ago in reply to Yasin ALYAPRAK

Guru 140200 points

Thanks for the feedback :-)

Kai

Amplifiers

Amplifiers forum

XTR116: XTR116 measuring problem