TRF1208: Matching network for 8.3GHz with AFE7953

Abhishek Parikh

Part Number: TRF1208
Other Parts Discussed in Thread: AFE7950EVM

Dear TI E2E community,

We've followed design https://www.ti.com/lit/ds/symlink/trf1208.pdf?ts=1715089136740 page 30 for Transmitter impedance matching network with TRF1208.

Effectively we're getting very bad output like -20dB less compared to expected.

Below is snap of our design.

Any help will be appreciated.

Regards,

Abhishek

over 1 year ago

0 Hruday Kumar Mudireddy over 1 year ago

TI__Expert 4550 points

Hi Abhishek,

Can you share which components are populated and which are DNI in above schematic?

Also, what is the output signal you are measuring in dBm when you run DAC at full scale?

Regards,

Hruday

0 Abhishek Parikh over 1 year ago in reply to Hruday Kumar Mudireddy

Prodigy 205 points

Dear Hruday,

We're getting -10dBm signal while running at full scale on our custom board, while we have tested it on AFE7950evm without TRF1208 and same config it's giving 3dBm power.

As described in https://www.ti.com/lit/ds/symlink/trf1208.pdf?ts=1715089136740

Page 30 TRF1208 datasheet we have followed reference circuit with 8.2GHz.

Regards,

Abhishek

0 Hruday Kumar Mudireddy over 1 year ago in reply to Abhishek Parikh

TI__Expert 4550 points

Abhishek,

I am closing this thread as we took the conversation offline. Please feel free to reach out if you have any questions through email.

Regards,

Hruday

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TRF1208: Matching network for 8.3GHz with AFE7953