LMG3410: Voltage at RDRV Pin

Marcel Kossek

Prodigy 70 points

Part Number: LMG3410

Hi,

we would like to control the slew rate of the LMG3410 through a digital potentiometer.

In the Data Sheet it is not that clear, is there a current mirror connected to Pin RDRV?

Which voltage can i expect at that Pin?

Kind regards Marcel

over 6 years ago

0 Serkan Dusmez over 6 years ago

TI__Intellectual 805 points

Hello Marcel,
The voltage on the RDRV pin is about 1.25V. We have not tested the operation with a digital potentiometer. Does it consist of a ladder resistor arrays or act as a current source? If it is the ladder type with passive resistors, there should not be any problem. If it works like a current source, the closed loop frequency would become important.
Regards,
Serkan

0 Marcel Kossek over 6 years ago in reply to Serkan Dusmez

Prodigy 70 points

Thanks for your fast response, Serkan!
Yes it will be probably a ladder resistor array.

Regards,
Marcel

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LMG3410: Voltage at RDRV Pin