LMH6401: Variation of input resistance

Shota Mago

Expert 6580 points

Part Number: LMH6401

Hi team,

I'm an FAE supporting some industrial companies in Japan.

My customer uses LMH6401 and he asked me following questions.

Does input resistance change with secular change?
e.g. If an LMH6401 has 85Ω, will it keep 85Ω over years?
Does input resistance change with temperature?
Do you have actual variation data of input resistance?

I'm looking forward to hearing from you.

Best regards,

Shota Mago

over 5 years ago

0 Rohit Bhat over 5 years ago

TI__Genius 15975 points

Hi Shota-san,

To answer your questions:
1. I would think that unless you electrically overstress the inputs over years, the LMH6401 differential input resistance should hold fairly constant.
2. Yes, the input resistance would change with temperature as any given resistor depending upon the temperature coefficient of the material used to build the resistor.
3. Are you looking for actual variation data of input resistance across temperature, or different parts?

Best Regards,
Rohit

0 Shota Mago over 5 years ago in reply to Rohit Bhat

TI__Expert 6580 points

Hi Rohit-san,

Thanks for your quick reply.

My questions were almost solved.

As for variation data, I will check customer and let you know.

Best reagards,

Shota Mago

0 Shota Mago over 5 years ago in reply to Rohit Bhat

TI__Expert 6580 points

Hi Rohit-san,

In terms of variation data, the customer wants manufacturing variability of input resistor.

Also, could you provide the temperature coefficient of the material used to build the resistor?

Thans for your cooperation.

Best reagreds,
Shota Mago

0 Shota Mago over 5 years ago in reply to Rohit Bhat

TI__Expert 6580 points

Hi Rohit-san,

Would it be possible to provide variation data and temperature coefficient by June 26?
Thanks for your time and cooperation.

Best regards,
Shota Mago

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LMH6401: Variation of input resistance