UC1825A-SP: UC1825A-SP 1.25V internal voltage

Hello Jason,

We do not have data on the actual offset voltage itself. However, we have data showing the error amplifier output which should be the same as the 1.25V offset due to the virtual short between the pins. You can find the radiation data concerning this parameter on page 48 of the radiation report at www.ti.com/.../snaa272.pdf.

Over temperature we have measured the following. Note that these are our samples that we measured and are not guarantees.

	Minimum measured	Typical	Maximum measured
25C	1.162	1.218	1.253
125C	1.131	1.162	1.192
-55C	1.116	1.143	1.162

I will see if we have any data related to lifetime or other internal parameters.

Thanks,

Kyle

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Hi Kyle,

I could not open the snaa272.pdf file. Could you send the rad data for me jason.nguyen@microsemi.com

Thanks
Jason

Hi Jason,

Sorry, a period was placed at the end of the URL. You can remove the period or try again: www.ti.com/.../snaa272.pdf

I can send an email if it still doesn't work.

Thanks,
Kyle

Hi Kyle,

Sorry for late response,  I was out on vacation. Yes, I am able to review the Rad data. Is there any way we could predict how much variation on this 1.25V parameter due to aging effect ?

Thanks

Jason

Hello Jason,

Glad I was able to answer your question. I had to remove the data on the post but I emailed it to you for your reference.

I also just want to point out that on the datasheet it says, "Current limit threshold is assured to a tolerance of 5%". This 5% is due to the internal device variation and could potentially be greater due to external component variation. See Icl under electrical characteristics for how this value was determined.

Thanks,
Kyle