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# application note AN1593 for the ADHV4702

Category: Datasheet/Specs

I have a question regarding application note AN1593 for the ADHV4702.

Q1: VCC and VEE fluctuate constantly. DGND connection
Should I create and connect a VCC-VEE intermediate potential separately?

(With VEE, I am concerned that the maximum absolute rating is VEE to VCC-12V and the margin is 0.)
2: To what potential should EXPAD be connected?

Thank you.

## Top Replies

• Hi  san,

The author of the article explains that the DGND is only needed as reference for the SD, TMP and RADJ pin same as what we've shown before.

Having the DGND connected to ground(0V) will violate…

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• Hi,

Can you please clarify what you mean when you ask if you should create and connect a VCC-VEE potential? Where do you mean to connect with respect to Figure 1?

The recommendation is for the exposed pad to be connected to the

Thanks,
Karen

• I'm looking at an example circuit for AN-1593.
For example, when trying to output ±250V, the power supply voltage of the circuit is about ±300V and Vcc of the ADHV4702-1 is about 270V.
Also, VEE may exceed 0V.
The datasheet says EXPAD should be connected to DGND.
Also, the maximum absolute rating is VEE to VCC-12V.
Margin=0, should VEE=DGND?
Or is it better to make an intermediate potential and connect it?
Or should I leave it open
(In that case, I wonder if the withstand voltage of EXPAD against VCC and VEE is okay)

Supplement: I also ask local manufacturers

ez.analog.com/.../kwatanab23

• I'm looking at an example circuit for AN-1593.
For example, when trying to output ±250V, the power supply voltage of the circuit is about ±300V and Vcc of the ADHV4702-1 is about 270V.
Also, VEE may exceed 0V.
The datasheet says EXPAD should be connected to DGND.
Also, the maximum absolute rating is VEE to VCC-12V.
Margin=0, should VEE=DGND?
Or is it better to make an intermediate potential and connect it?
Or should I leave it open
(In that case, I wonder if the withstand voltage of EXPAD against VCC and VEE is okay)

Supplement: I also ask local manufacturers

ez.analog.com/.../kwatanab23

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