CC2592: Impedance

A google search on "impedance cc2592 e2e" shows what we have answered other with similar question.

What is the background for the question?

People are still looking for appropriate answer but unfortunately they have not got the appropriate answer.
There some people who are really interested in core of the technical information rather then just integration, so he one of those and just want know the necessary information for better implementation.

To my knowledge we have not measured the input impedance, one reason is that it's difficult to measure a differential input impedance accurately. Secondly, the question is which impedance the PA connected the input want to see.

I can understand that some people want all details but to deviate from the reference design require a deep RF knowledge and a well equipped RF lab. If they have that they should be able to measure the impedance themself if needed.

1) want to see Impedance across RF_P and RF_N at input side
2) it's simple if we had well equipped RF lab,then we could have measured, without disturbing the community

As said, we don't have number.

If you had it, how would use the number?

As mentioned is the description of the thread we have calculated the impedance and asked for verification.
We don't want to use a fixed impedance balun ...we want to have impedance matching circuit with discrete components.
If we know the impedance value it will help us.

LDB182G4520C-110 is only used for the CC2592 standalone EMs. For all our reference designs with CC25xx/ CC25xx used together with CC2592, the RF pins on the wireless MCUs are connected directly to the RF_P/ RF_N pins on CC2592.

When you write that you want to replace LDB182G4520C-110 with a discrete network, what are you planning to use as input to CC2592?

we want to use CC2500 as input to cc2592.

Hello TER,

We have an 8 antenna structure operated via a SP8T switch. The unbalanced common port of the switch is connected to balanced CC2500 through a balun. The switch is connected to antenna through a microstrip line with 50 ohm of impedance. As we are using antenna structure for space diversity, transmission line lengths are approximately 6 to 7 cm. As the received signal is very low, we want to put LNA as soon as we received the signal so that noise will be reduced.

So we want to use CC2592 as LNA. The input of CC2592 is driven by a 50 ohm micro-strip line coming out of switch port.

Thanks
Venu

Our Application circuit is similar to as shown above.There will be single ended input to balun, But instead of balun we will be using discrete components for impedance matching.Hence we want to know input impedance of  cc2592

Have you looked at the reference design I pointed you to?

In cc2538-cc2592 reference design output of cc2538 and input to cc2592 is differential. Our application is different.
Kindly look at the above application circuit which I mentioned.
output of cc2500 is single ended and similar to the above circuit.

No, the output of CC2500 is differential. Why do you want to go from differential - single ended - differential to interface with CC2592?