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ADF4212L power up sequence through rate

Hi,

As a local distributor, our customer is facing to error when starting up ADF4212L. By studying in the customer's side, they found VDD1=VDD2=3.3V might be a cause when it relatively slow / long ramp-up period, as shown in below at yellow line indicates.

It seems there is no description defined in datasheet in regard to power up, so if you provide required specification how long, how fast, how steep or any to achieve normal start up of this PLL device. Other words, the customer may be able to see good result when shorten above ramp-up period, but feeling needs to confirm what is defined power up sequences.

Any of your comments or supports would be very much appreciated.

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  • Hello,

    We need more information to figure out what may be the reason for the issue that the customer is experiencing. You mentioned that the customer face an error - but unfortunetely we don't know what this error is, neither if it is on RF channel or IF channel, as there is no explanation what this error looks like. I would appreciate if you could provide some more detailed information so that we could investigate this case.

    As a first-hand advice, i would like to ask you to clear all bits (programm to 0) in Register 0 (IF R counter latch) and write 0x2 to Register 2 (RF R counter latch) after the part is powered up, and only after that is done to write all you register with current settings. Does the error still appear after this sequence? And what is the error?

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  • Hello,

    We need more information to figure out what may be the reason for the issue that the customer is experiencing. You mentioned that the customer face an error - but unfortunetely we don't know what this error is, neither if it is on RF channel or IF channel, as there is no explanation what this error looks like. I would appreciate if you could provide some more detailed information so that we could investigate this case.

    As a first-hand advice, i would like to ask you to clear all bits (programm to 0) in Register 0 (IF R counter latch) and write 0x2 to Register 2 (RF R counter latch) after the part is powered up, and only after that is done to write all you register with current settings. Does the error still appear after this sequence? And what is the error?

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