DAC53004: Wake-up time after VOUT-PDN

Aurelie Duval

Part Number: DAC53004

Hello,

We are working with the DAC53004 in a force-sense configuration with a MOSFET as explained in the application note https://www.ti.com/lit/an/slaae28a/slaae28a.pdf?ts=1697094019325&ref_url=https%253A%252F%252Fwww.google.com%252F.

We are doing pulse of 250us at 50Hz. When the pulse is not active, hence when the DAC output channel is not active, we power down the channel (VOUT-PDN). There is no indication in the datasheet on how much time it needs to wake-up after this power down? We noticed that it was longer than expected (around 60us).

Do you have any information about that?

Best Regards,

over 1 year ago

0 Paul_Frost over 1 year ago

TI__Guru 53573 points

Hi Aurelie,

we will need to confirm with our design team for this information. We will inquire, please give me a day or two..

Paul Frost

0 Aurelie Duval over 1 year ago in reply to Paul_Frost

Prodigy 150 points

Hi Paul,

Did you get any feedback from your design team ?

Best Regards,

Aurélie

0 Katlynne Jones over 1 year ago in reply to Aurelie Duval

TI__Mastermind 33928 points

Hi Aurélie,

I just asked for a follow-up this morning.

Do you know if you see the same powerup delay when there is no load connected to the output? Can you share a screenshot of the output after you send the powerup command up until the output reaches the target voltage?

Best,

Katlynne Jones

0 Aurelie Duval over 1 year ago in reply to Katlynne Jones

Prodigy 150 points

Hi Katlynne,

I made the measurement and the delay stays the same:

The blue is the CS of the DAC and the pink is the OUT of the DAC.

Best,

Aurélie

0 Katlynne Jones over 1 year ago in reply to Aurelie Duval

TI__Mastermind 33928 points

Hi Aurélie,

Thanks for checking that the delay is not load dependent. I heard back from the designer that the minimum time expected by design is 50us, so this seems to be an expected time for the device to exit power down mode.

Best,

Katlynne Jones

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DAC53004: Wake-up time after VOUT-PDN