ADC31JB68: How to protect the analog input against over voltage?

Rodrigo Bernardo

Part Number: ADC31JB68

Hi, since the ADC31JB68B has a small input range (1.7Vpp) I did not find any kind of TVS or zener that I could use to protect it against over voltage.

I would like to know if you have any suggestion?

Thank you,

Rodrigo

over 3 years ago

0 Amy over 3 years ago

TI__Genius 15321 points

Hi Rodrigo,

I am checking into this and will get back to you soon.

Regards, Amy

0 Rob Reeder over 3 years ago in reply to Amy

TI__Mastermind 37740 points

Hi Rodrigo,

Here are a few suggestions:

MBRS410ET3GOSCT

RB851YT2RCT

DLM-10SM

If SFDR is critical to your application, you may have to try out a few different types to make sure they don't add too much distortion, especially as the input signal gets closer to fullscale.

Regards,

Rob

0 Rodrigo Bernardo over 3 years ago in reply to Rob Reeder

Prodigy 190 points

Hi Rob, thanks for the suggestions.

The DLM-10SM is very interesting, but it is too expensive.

I will try to clip the over voltage with maybe two schottkys in series for each polarity, like the example below:

Regards,

Data converters

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ADC31JB68: How to protect the analog input against over voltage?