DAC5652-EP: Radiation endurance and performances at 250MSPS

Victor Centazzo

Part Number: DAC5652-EP
Other Parts Discussed in Thread: DAC5675A-SP

Hi,

I would be interested to use the DAC5652-EP converter for a space radar, because it is dual-channel, its architecture is quite simple, it has a satisfying resolution and it looks having a moderate power consumption at the sampling rate of 250MSPS. However I need some informations I have not found in the datasheet :

1 : Do you know for what temperatures this DAC can work at 250MSPS?

2 : How much power does it consume at this sampling rate ?

3 : Do you have a report which could give its radiations tolerance? I'm looking for a DAC which would have low criticality for an ionizing dose>30krad and with a LET>40MeV. I see the DAC5675A-SP matches with these conditions, but it has only one channel and it looks having a consequent power consumption at 250MSPS. This is why I would prefer to choose the DAC5652-EP, but I need to be sure it will be safe to use it.

Thank you for your help.

Regards

Victor

over 1 year ago

0 Rob Reeder over 1 year ago

TI__Mastermind 25980 points

Hi Victor,

Questions 1 and 2, please refer to the datasheet.

I will work on question 3 and get back to you.

Thanks,

Rob

0 Victor Centazzo over 1 year ago in reply to Rob Reeder

Prodigy 30 points

Hi Rob,

Thank you for your answer. The datasheet gives its electrical characteristics for only 200MSPS. This document tells it is "not production tested" for the best sample rating (275MSPS).

Regards,

Victor

0 Rob Reeder over 1 year ago in reply to Victor Centazzo

TI__Mastermind 25980 points

Hi Victor,

We don't have any radiation testing on “EP” devices.

Radiation characterization for SEE (single event effects) or TID (total ionizing dose) are only performed and reports provided for “SEP” or “SP” which are space-grade devices.

I will need to look further into your sampling rate comment. Please give me a few days.

Thanks,

Rob

0 Rob Reeder over 1 year ago in reply to Rob Reeder

TI__Mastermind 25980 points

Hi Victor,

I apologize for the delay, please only use the rated/tested/characterized sampling rate of 200MSPS for this device per the datasheet.

Sorry for the confusion.

Regards,

Rob

0 Victor Centazzo over 1 year ago in reply to Rob Reeder

Prodigy 30 points

Hi Rob,

Thanks for your feedback. I'm sorry, I don't understand why the datasheet announces a typ sampling rate of 275MSPS (page 8), when it is recommended to use this device at 200MSPS.

Regards,

Victor

0 Rob Reeder over 1 year ago in reply to Victor Centazzo

TI__Mastermind 25980 points

Hi Victor,

Unfortunately, I cannot give you a good answer for that. This is an older part and there is no body around that originally released this device.

We obviously need to update this datasheet to cause less confusion.

Thank you for bringing this to our attention.

Regards,

Rob

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DAC5652-EP: Radiation endurance and performances at 250MSPS