XTR116: EOS Protection Issue

Tess Chen

Part Number: XTR116
Other Parts Discussed in Thread: XTR115

Hi Team,

Some failures comes up with the phenomena that device can not generate the right current with different input and loop current stays at maximum. FA report shows the failure is caused by the EOS. Could you please give some suggestions for XTR116 hardware protection design to help prevent the EOS? Thanks in advance.

Best Regards,

Tess Chen

over 5 years ago

0 kai klaas69 over 5 years ago

Guru 140200 points

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

0 Raymond Zhang1 over 5 years ago in reply to kai klaas69

TI__Guru* 77541 points

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 over E2E? if unable, please send it via my internal email.

Best,

Raymond

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

TI__Intellectual 2675 points

Hi Raymond,

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

Best Regards,

Tess

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

TI__Guru* 77541 points

Hi Tess,

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

Best,

Raymond

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XTR116: EOS Protection Issue