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AFE7769: AUXADC PINS USE CASE

NIMESH M

Prodigy 80 points

Part Number: AFE7769

Hi Team,

For this AFE7769, Could you please explain the exact use case of the pins AUXADC1 - AUXADC6.

over 2 years ago

0 Kevin Dai over 2 years ago

TI__Intellectual 2070 points

Hi Nimesh,

The functionality of AUXADC1 - AUXADC6 is explained in section 9.3.14 of the AFE7769 datasheet. Please let us know if you have any questions after reading it.

0 NIMESH M over 2 years ago in reply to Kevin Dai

Prodigy 80 points

Hi Kevin dai,

In our design, we have an E-FUSE TPS16530RGE. We designed its IMON pin for VIMON=4V & IMON=0.616A.

Can we connect that IMON pin of TPS16530RGE to the AUXADC Pins of AFE7769D for current monitoring purposes? could you please confirm please refer to the attached image.

0 Kevin Dai over 2 years ago in reply to NIMESH M

TI__Intellectual 2070 points

Nimesh,

Just to clarify, you are asking about AFE7769D, not 69 right?

0 NIMESH M over 2 years ago in reply to Kevin Dai

Prodigy 80 points

Hi Kevin Dai,

yes i am asking about AFE7769D.

+1 Kevin Dai over 2 years ago in reply to NIMESH M

TI__Intellectual 2070 points

Nimesh,

The AUX ADC pins should be able to monitor the 4v voltage supply coming from TPS16530RGE.

Kevin

0 NIMESH M over 2 years ago in reply to Kevin Dai

Prodigy 80 points

Hi Kevin Dai,

So as per the discussion we had, I have given connections like this

we are using 4 such TPS16530RGE in our design. So I used 4 AUXADC pins for connection and the other 2 AUXADC I grounded. This will be okay right? please give your feedback.

0 Kevin Dai over 2 years ago in reply to NIMESH M

TI__Intellectual 2070 points

Yes, connecting the 2 unused AUXADC to ground should not cause any issues. In fact, in the AFE7769 EVM schematic, thats how the AUXADC pins are connected.

Kevin