TRF3750

KOUICHI NAKAJIMA

I have a question about the sequence of TRF3750.
I understand that it is discontinued.
I am using the following conditions
REF=10MHz
RF=100MHz
Normally REF/RF, with power applied to the
Serial data is transmitted, but
If REF is input after the serial data
Is there any particular problem?

over 2 years ago

0 Kang Hsia over 2 years ago

TI__Guru 71219 points

Hi Kouichi-san,

KOUICHI NAKAJIMA said:
If REF is input after the serial data
Is there any particular problem?

No, there should not be any problems. The SPI bus is operating on the SPI clock domain, independent of REFIN

0 KOUICHI NAKAJIMA over 2 years ago in reply to Kang Hsia

Prodigy 20 points

Thank you for your response.
One more question.
Can the VCO input also be after the serial data?

0 Kang Hsia over 2 years ago in reply to KOUICHI NAKAJIMA

TI__Guru 71219 points

Kouichi-san,

I do not think it is also an issue. I would recommend you to initialize the synthesizer after the VCO (RF) input stabilizes.

0 KOUICHI NAKAJIMA over 2 years ago in reply to Kang Hsia

Prodigy 20 points

Thank you for your response.
I asked the question because the operational sequence was different from the internal inspection sequence.

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TRF3750