CC2500/CC2592 : connection and thermal pad

Benjamin Bages

Other Parts Discussed in Thread: CC2500, CC2592, CC2538

Hi everyone,

I have two questions about CC2500 and CC2592.

1) Should I connect thermal pad of CC2500RGP and CC2592RGV to ground ?

2) Moreover, could I directly connect CC2500 to CC2592 or is it necessary to add components on RF_P and RF_N like inductors or capacitors ? I don’t find schematic about those two devices together.

Thank you for your responses and have a nice day!

Best regards,

Benjamin

over 11 years ago

0 PM over 11 years ago

TI__Mastermind 27145 points

Hi,

Yes, the paddles of CC2500 and CC2592 should be grounded.

Yes, it is better to add a matching circuit in between them. You can optimize on the proto types.

Thanks,

0 Benjamin Bages over 11 years ago in reply to PM

Prodigy 30 points

Hi PM,

Thank you to have spent time to answer me.

An other question, how can I determinate the matching circuit value between CC2500 and CC2592? Have you got typical value for them ?

Thank you and have a nice day!

Benjamin

0 Eirik V over 11 years ago in reply to Benjamin Bages

TI__Guru 56590 points

Hello Benjamin,

My suggestion to you would be to make a prototype board based on the CC2538-CC2592EM design and test the performance both with the matching network between the chips and without. Look at how the matching has been implemented on the CC2538-CC2592EM - both sides of CC2592. The shunt component between the transceiver and CC2592 is not used, but we found that if you place CC2592 closer to CC2538 than we do in the current reference design, a shunt inductor was needed to compensate some of the inductance lost in the traces.

0 Benjamin Bages over 11 years ago in reply to Eirik V

Prodigy 30 points

Hello Eirik,

Thank you for your response.

Distance between the two pads of CC2500 and CC2592 is 2.5mm and i can place them closer.

In fact, I have completly followed the schematic of CC2538-CC2592EM and I wonder:

1) if it was the same schematic by changing CC2538 to CC2500 ie the same impedence matching between CC2500/CC2592 and between CC2592/ANT.

2) Do you think inductor is needed ? If yes, which value? What does DNM mean ?

Thank you to have spent time to anwser me.

Benjamin

0 Eirik V over 11 years ago in reply to Benjamin Bages

TI__Guru 56590 points

Hello Benjamin,

Read the following thread for more info:

http://e2e.ti.com/support/wireless_connectivity/f/964/t/342972.aspx

"DNM" means "Do Not Mount".

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CC2500/CC2592 : connection and thermal pad