OPA836: OPA836IRUNT as non-inverting amp with gain 1

Vlad Chekan

Part Number: OPA836

I want to use OPA836IRUNT as a non-inverting amplifier with a gain of +1. I shorted Output (pin1) and inverting input (pin 2). What I should do with pin 6,7,8,9? Can I leave open these pins?

over 1 year ago

0 kai klaas69 over 1 year ago

Guru 140200 points

Hi Vlad,

has already been answered:

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/946018/opa836-how-to-treat-unuse-fbx-pin-on-opa836

Kai

0 Vlad Chekan over 1 year ago in reply to kai klaas69

Prodigy 10 points

Thanks, for the answer.
I looked into it, but I have a PCB where pins 1 and 2 are shorted, and pin 9 is not connected anywhere.
Could this be a problem?

0 kai klaas69 over 1 year ago in reply to Vlad Chekan

Guru 140200 points

Hi Vlad,

hard to say whether it's a typo and should mean a short between pin 1 and pin 2 in table 9-1 of datasheet, instead of pin 1 and pin 9. Or if the short between pin 1 and pin 9 is intended to prevent a complete floating of the pins 6, 7, 8 and 9. Both would make sense. So let's wait what TI is saying to all this.

Kai

0 Vlad Chekan over 1 year ago in reply to kai klaas69

Prodigy 10 points

Thanks, Kai.
Let's wait until TI answering to this question.

+1 SimaJalaleddine over 1 year ago in reply to Vlad Chekan

TI__Mastermind 22480 points

Hello Vlad,

Kai is correct it should be a short between pin 1 and 2 as you initially have the setup. You may leave pin 6 to 9 on the RUN package floating.

Thank you,

Sima

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OPA836: OPA836IRUNT as non-inverting amp with gain 1