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Thanks for the feedback :-)

Kai

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

Hi Yasin,

may I ask, how you did solve it?

Kai

Thank you for reply. I have solved . 

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…

HI Annie,

The XTR111 and XTR300 do not work for HART as they use a chopping current-mirror architecture to reduce device offset and the switching frequency interferes with the HART communication protocol.  This noise can be filtered noise on non-HART applications;…

Hi Yasin,

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

Kai

Hi Tess,

I am going to close this inquiry. Please contact me via my internal email. 

Best,

Raymond

Hi Raymond,

Thanks, I have sent to you a e-mail for details.

Best Regards,

Tess

Hi Tess,

In addition to Kai's comments, XTR116/XTR115 are 2-wire 4-20mA current loop transmitter. Pin 4 at Io has to be able to float, see the schematic on p1 of the datasheet. Pin 3 or Iret has to be referenced to  pin 4. Could you post the schematic…

Hi Tess,

can you specify the EOS? And from where is it enetering the circuit?

Have you seen figure 4 of datasheet and the protection measures discussed there?

Kai

Hi David,

As Kai indicated that Iret or pin3 and pin4 have to be floating. XTR115, XTR116 and XTR117 are all 2-wire, 4-20mA current loop transmitters. 

Also, see 4-20mA Basic.pdf file in the attachment link below.  

https://e2e.ti.com/support/amplifiers…

Hi Raghavendra,

The XTR117 device must not be exposed to over-currents and over-voltages above the Absolute Maximum Ratings as shown on page 2 of the device datasheet to avoid permanent damage. 

The "2-wire 4-20mA Transmitter, EMC/EMI Reference Design…

Hi Kazuya,

We offer 4-20mA current loop transmitters such as the XTR111 (3 wire) and the XTR117, XTR116 and XTR115 family of 2-wire current output 4-20mA loop transmitters. These of course only offer current output and their functionality is not equivalent…

Pablo,

Thank you for letting us know, let us know if you have other questions.

Kai,

Many Thanks for your inputs,

Best Regards,

Luis

Hello Kai,

Thank you for your comments.
I checked everything you said.
ISO7310C current is 1.8mA:

Finally I replaced 10nF output capacitor by 100nF and the overshoot disappeared.

Best regards,
Pablo

Hi Pablo,

two issues come into my mind. There could sit too much undesired stray capacitance across the barrier between GND1 and GND2. Or the low pass filter labelled with "Rflt Cflt" is not properly working.

Can you measure the voltage across…

Hi,

Something to consider is that there are critical digital input voltages that result in the DAC7611 drawing more current.

My suspicion is that the slower ramp rates when using 5.6kΩ resistors result in the VREG output of the XTR116 to collapse or…

Hi Ismail,

Is the issue occurring on several XTR116 devices or just one device?  If this is occurring on one device, is it possible to replace the device?  

If the issue is showing on a few devices, could you please post the complete schematic and PCB layout…

Hi Ismail,

regarding C18, see figure 5 of datasheet!

Kai

The IRET pin has no connection to the GND of the current loop. I designed the circuit by following the forums that they should not be combined.

DAC and MCU are powered by XTR116. However, because the XTR116 draws too much current, I disabled these connections…

HI Ismail,

The expected current consumption of the XTR116 is less than 250uA. It is important to highlight that the XTR116 is a two-wire transmitter. 

Questions:

- In the schematic above, it is not clear if IRET is floating with respect to loop Ground…