OPA4171-Q1: PSRR

kura

Genius 4730 points

Part Number: OPA4171-Q1

Please check unit of PSRR in datasheet.

Is uV/V correct ?

over 3 years ago

0 kai klaas69 over 3 years ago

Guru 140200 points

Hi Kura,

Figure 6-10 of datasheet shows a PSRR of 120dB typical. 120dB equals 1µV / V. Therefore a maximum specification of 3µV / V can absolutely make sense.

Kai

0 Caro Walter over 3 years ago

TI__Mastermind 18907 points

Hey Kura,

Thanks for bringing up the confusing units, I will reach out to our systems team to have this fixed.

All the best,
Carolina

0 Michael Steffes over 3 years ago in reply to Caro Walter

Guru 48395 points

So Kura, what happened is the actual ATE output data is uV/V input referred offset voltage shift with supply voltage, that then converts to a 110dB minimum - that 3uV/V in the max column would be the test limit.

0 Caro Walter over 3 years ago in reply to Michael Steffes

TI__Mastermind 18907 points

Hey Kura,

This is a confirmed mistake on our part, thank you so much for catching it! This will be fixed in the newest revision of the datasheet.

All the best,
Carolina

0 kura over 3 years ago in reply to Caro Walter

Genius 4730 points

Caro-san

Thank you for your support.

What will the datasheet description change to?

0 kai klaas69 over 3 years ago in reply to kura

Guru 140200 points

What is your wish, Kura?

Kai

0 Caro Walter over 3 years ago in reply to kai klaas69

TI__Mastermind 18907 points

Hey Kura,

It is up to the systems engineer but I imagine the change will make both the typical and max spec the same units.

Therefore with that assumption, I believe typ: 1uV/V, max: ±3uV/V.

All the best,
Carolina

P.S. Kai sorry about editing your post, it was accidental!

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OPA4171-Q1: PSRR