About SStad.3

SStad.3 · 2021-08-11

Hi everyone,I designed my own board for the St25ru3993. Now I am trying to ramp up the RF Field. But before I can do that i need to check if the PLL is locked and the oscilator signal is stable. So i read the AGC and internal status display register....

SStad.3 · 2021-05-04

How to match the output of the internal power amplifier to 50OHM? The Datasheet doesn't provide the output impedance. I know the eval board provides a schematic for the matching, but i don't want to simply copy and paste. I would like to understand. ...

SStad.3 · 2021-09-15

Should I be able to measure some voltage at the external part of the loop filter?

SStad.3 · 2021-09-15

Ok, so I tested your recommendations. I think the problem is that the 0xA5 and 0xA4 commands are not producing an interrupt. Other commands like Soft_Init do produce interrupts. So I guess the VCO commands are not working. If I assume that it is wor...

SStad.3 · 2021-08-27

SStad.3 · 2021-08-27

Hi Bart,I'm writing my own Code by manipulating the registers via SPINow I configured the IC for the TXCO. The status register indicates that the reference frequency is stable.I tried the Automatic VCO segment selection direct command, but the IC nev...

SStad.3 · 2021-05-28

So my layer stackup is 0.17mm of fr4 vs. 0,25mm fr4 of the eval board. But you recommend staying with the same dimensions for the diff pair? Trace widht is 0,8mm and spacing 0,15mm for the eval board. I calculated a width of 0,64mm and spacing 0,3mm ...

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Strange Values in AGC and internal status display register.

ST25RU3993 internal power amplifier matching to 50OHM

Re: Strange Values in AGC and internal status display register.

Re: Strange Values in AGC and internal status display register.

Re: Strange Values in AGC and internal status display register.

Re: Strange Values in AGC and internal status display register.

Re: ST25RU3993 internal power amplifier matching to 50OHM