ADS4246: ADS4246 power on sequence

lei zhou1

Part Number: ADS4246

I want to confirm whether the ADS4246IRGCT have power on sequence requirement for AVDD and DRVDD? No power on sequence description in the datasheet, it is mean no power on sequence requirement for ADS4246IRGCT?

Thanks.

over 5 years ago

+1 Kang Hsia over 5 years ago

TI__Guru* 84005 points

Hi,

there are no specific power up sequence for the two rails. Please do be aware of the following absolute maximum ratings between the two rails

0 lei zhou1 over 5 years ago in reply to Kang Hsia

Intellectual 280 points

Thanks Hsia.

0 lei zhou1 over 5 years ago in reply to Kang Hsia

Intellectual 280 points

Thanks Hsia.

0 lei zhou1 over 5 years ago in reply to Kang Hsia

Intellectual 280 points

Thanks Hsia.

0 lei zhou1 over 5 years ago in reply to Kang Hsia

Intellectual 280 points

Hi Hsia, I have two questions need your help:

1. I found duplicated Pin42 and missed pin44 in ADS4246 package, one pin42 mapping to DA2M, another pin42 mapping to DA4M, I think it is a mistake, DA4M should be mapping to pin44, is that right? Hope your answer, thanks.

2. ADS4246 analog input drive circuit have transformer, what's the role of transformer? My design is yellow diagram, is it necessary to use transformer here?

0 Kang Hsia over 5 years ago in reply to lei zhou1

TI__Guru* 84005 points

Hi Lei,

lei zhou1 said:
1. I found duplicated Pin42 and missed pin44 in ADS4246 package, one pin42 mapping to DA2M, another pin42 mapping to DA4M, I think it is a mistake, DA4M should be mapping to pin44, is that right? Hope your answer, thanks.

Yes, DA4M should be mapped to pin 44

lei zhou1 said:
2. ADS4246 analog input drive circuit have transformer, what's the role of transformer? My design is yellow diagram, is it necessary to use transformer here?

please refer to datasheet for detail:

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ADS4246: ADS4246 power on sequence