DAC900: About the configuration of DAC900

Yatao Ling1

Part Number: DAC900

Hi TI expert,

I wonder if DAC900's VA(analog supply) and VD(digital supply) can both be +3.3V? I have this question because DAC900's datasheet says that its VA and VDs' typical values are both +5V.

Besides, can DAC900's pin 25 be connected to digital ground?

I have such two qustions just because that I want to build a PCB having the TSSOP-28 footprint suitable for TI's DAC900 and ADI's AD9740. I have a third question, is this ok, if I feed DAC900 with clock rate of 150MHz and AD9740 with 200MHz. AD9740's link is given here, https://www.analog.com/media/en/technical-documentation/data-sheets/AD9740.pdf

Regards

Yatao

over 5 years ago

0 Yusuf%20Agoro over 5 years ago

TI__Expert 4880 points

Yatao,

I have forwarded your question to a device expert. They should be with you shortly.

Thanks

Yusuf

0 Yatao Ling1 over 5 years ago in reply to Yusuf%20Agoro

Expert 1840 points

Hi Yusuf
I'll wait.

Regards
Yatao

0 jim s over 5 years ago

TI__Guru* 91947 points

Yatao,

You can use +3.3V for both supplies. You can connect pin 25 to GND but would recommend leaving it unconnected per the data sheet. You can clock the device at 150MHz. Not sure what you are asking in your last question. Is this regarding the Lecroy pulse generator the AD9740 is showing in the data sheet for a clock source? If so, I do not see a problem using this.

Regards,

Jim

0 Yatao Ling1 over 5 years ago in reply to jim s

Expert 1840 points

Hi Jim,
thx!
Actually, my last question is whether AD9740 can be fed with 200MHz clock?

Regards
Yatao

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DAC900: About the configuration of DAC900