ADC081C021: ADC081C021 ALERT voltage

KOJI HARADA

Prodigy 20 points

Part Number: ADC081C021

Tool/software:

Can ALERT pin withstand 5V or higher?

4 months ago

0 Joel Meraz 4 months ago

TI__Genius 9640 points

Hi Koji,

Yes, the ALERT pin is expected to be pulled up to VA. The maximum operating rating of VA is 5.5V, so ALERT will operate with that voltage at a maximum as well.

Regards,
Joel

+1 KOJI HARADA 4 months ago in reply to Joel Meraz

Prodigy 20 points

Hi Joel,

I expect this chip VA is driven 1.8V and an external pull-up is driven 5V for ALERT. Is it okay?

0 Joel Meraz 4 months ago in reply to KOJI HARADA

TI__Genius 9640 points

Hi Koji,

The minimum supply voltage VA is 2.7V relative to the GND pin, so this device will not operate at VA = 1.8V.

With that said, if VA is above 2.7V, say 3V, the ALERT pin will have similar guidance to that of the digital inputs. See below.

Therefore, it will be okay to operate with ALERT tied to 5V and VA from 2.7V to 5.5V.

Regards,
Joel

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ADC081C021: ADC081C021 ALERT voltage