PSoC4100SP:Power supply VDDA ≠ VDDD

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RyYo_1406951
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Please answer below.
The same question is written in English and Japanese.

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※PSoC 4100S and PSoC 4100S Plus: PSoC 4 Architecture TRM, Document No. 002-10621 Rev. *G 21

・English
It is described as "VDDD and VDDA should be shorted externally.
"In the PSoC4100SP, can you not set “VDDA (5.0 V) ≠ VDDD (3.3 V)”?

・Japanese(日本語)
"VDDD and VDDA should be shorted externally."と記載されています。
PSoC4100SPでは、"VDDA(5.0V) ≠ VDDD(3.3V)"といった設定はできないのでしょうか?

Regards,

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1 Solution
Takashi_M
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1000 replies posted 500 solutions authored 750 replies posted

The separate power supply (e.g. VDDA=5V, VDDD=3.3V) is acceptable for not only PSoC4100S Plus, but also other PSoC devices.

This is for better analog performance in a mixed-signal circuit design. In this case, we have to make sure that VDDD ≤ VDDA.

Please see the following documentation.

AN88619 PSoC 4 Hardware Design Considerations Section 4.1 Power Pin Connections

https://www.cypress.com/file/141176/download

and

AN57821 PSoC 3, PSoC 4, and PSoC 5LP Mixed-Signal Circuit Board Layout Considerations Section 5 Multiple Power Domains

https://www.cypress.com/file/136286/download

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1 Reply
Takashi_M
Moderator
Moderator
Moderator
1000 replies posted 500 solutions authored 750 replies posted

The separate power supply (e.g. VDDA=5V, VDDD=3.3V) is acceptable for not only PSoC4100S Plus, but also other PSoC devices.

This is for better analog performance in a mixed-signal circuit design. In this case, we have to make sure that VDDD ≤ VDDA.

Please see the following documentation.

AN88619 PSoC 4 Hardware Design Considerations Section 4.1 Power Pin Connections

https://www.cypress.com/file/141176/download

and

AN57821 PSoC 3, PSoC 4, and PSoC 5LP Mixed-Signal Circuit Board Layout Considerations Section 5 Multiple Power Domains

https://www.cypress.com/file/136286/download

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