AFE5809: AFE5809 power plane and sequence

Elanthiraiyan Baskaran

Part Number: AFE5809

Hi,

1. AFE5809 datasheet says, avoid power planes under INM, INP, and ACT pins. Is it OK to have power plane till the input pins? (ie., from connector to AFE input)

2. If power sequences not met (within +/- 10 ms ) what will be the trade off?

Regards,

Elanthiraiyan B

over 5 years ago

0 Praveen Aroul over 5 years ago

TI__Mastermind 49956 points

Hello Elanthiraiyan,

Due to the Thanksgiving holidays, we will get back to you by early next week.

0 Xiaochen (Sean)Xu over 5 years ago in reply to Praveen Aroul

TI__Expert 6040 points

Hi Elanthiraiyan,

1. for the power planes, as long as the vias for INP, INM, ACT pins don't have power planes under it, it is OK. you can have power plane till the input pins.

2. when power sequence is not met, the long term reliablity may be affected some. because some nodes see unexpected voltage when certain power is not on. short term functionality/performance should not be affected.

Thanks!

Data converters

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AFE5809: AFE5809 power plane and sequence