LMH6518: Power Down 5V only

Antenna_Head

Genius 11915 points

Part Number: LMH6518

To save power, customer would like to power down analog 5V when signal chain is not in use, but leave 3.3V applied to VDD (digital).

Is this OK? Data sheet doesn't seem to mention power sequencing that I can see.

0 Hasan Babiker31 over 5 years ago

Hello,

Will look into this for you and let you know.

Best,

Hasan Babiker

0 Chuck Duey over 5 years ago

This would be disconnecting the +5V Analog using a FET. No active pull down other than what happens inside the LMH6518.

0 Hasan Babiker31 over 5 years ago in reply to Chuck Duey

Hello Chuck,

As long as there is no pull-down on the analog supply (VCC), it is fine to power only the digital supply (VDD).

Best,

Hasan Babiker

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