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Q&A about EPAD of ADA4666-2

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about EPAD of ADA4666-2

QYQ on Nov 13, 2020

Hi,

I need some help.

As below picture picked from the datasheet. it said EPAD can connect to V- or leave floating, does ADA4666-2 also work if connected EPAD to GND?

I mistakenly connected EPAD and GND, it sees the consumption of current rised.

I will make a change in the next design, and want to know what is the potential risk in my current circuit.

Best Regards,
Leo

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ARoxas
Nov 13, 2020 in reply to QYQ +1 verified
Hi,

It could possibly cause undesired running currents through the die in undesired and destructive paths.

0 ARoxas

on Nov 13, 2020 4:52 AM 7 months ago
Hi Leo,

On your circuit, where did you connect your V-? Is it shorted to GND?

Highly recommended is connect EPAD to V-.
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0 QYQ on Nov 13, 2020 5:00 AM 7 months ago in reply to ARoxas

Hi,

The power condition of my circuit is below.

V+ is +3.3V,

V- is -7.5V

Does the IC get damage when connecting EPAD with GND?

Thanks,
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+1 ARoxas

on Nov 13, 2020 5:27 AM 7 months ago in reply to QYQ
Hi,

It could possibly cause undesired running currents through the die in undesired and destructive paths.
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