TRF1213: S-parameter model (D2D or D2S)

Kazuto Odajima

Intellectual 290 points

Part Number: TRF1213
Other Parts Discussed in Thread: AFE7950, TRF1208, TRF1108

Tool/software:

I am currently developing a combination of AFE7950 and TRF1213.

I would like to perform DAC-side simulation, so could you provide me with a D2D or D2S S-parameter model?

I was only able to download S2D from the website.

11 months ago

0 Hruday Kumar Mudireddy 11 months ago

TI__Expert 4820 points

Hi Kazuto-San,

TRF1213 cannot be used for D2D or D2S application as it has internal 50ohm termination on one of the input pins. It is suitable for S2D application.

Regards,

Hruday

0 Kazuto Odajima 11 months ago in reply to Hruday Kumar Mudireddy

Intellectual 290 points

Hi Hruday,

Does that mean that TRF1213 cannot be used on the TX side of AFE7950 in the same way as TRF1208?

I was thinking of replacing TRF1208 with TRF1213 because the relationship between Gain and P1dB did not match the required performance.

Is there any way to use TRF1213 with D2S?

Regards,

Kazuto Odajima

0 Srinivas Seshadri 11 months ago in reply to Kazuto Odajima

TI__Prodigy 290 points

Hi Odajima-san,

Yes that's correct. The TRF1213 support only S2D operation.

For D2S operation you can consider the TRF1108. You can consider backing off the DAC or adding a pad between AFE7950's DAC and TRF1108 if Gain exceeds P1dB.

Regards,
Srinivas

0 Kazuto Odajima 11 months ago in reply to Srinivas Seshadri

Intellectual 290 points

Hi Srinivas,

Thank you for your suggestion.

It seems that TRF1108 can be used without changing the power supply voltage from 5V.

However, this device is planned to be used in the X band, and TRF1108 cannot be used in the DC to 8GHz frequency range.

Is there any risk in using it in the X band?

If it cannot be used in the X band, the PWB will need to be modified, but we plan to change to TRF1208.

Regards,

Kazuto Odajima

0 Srinivas Seshadri 11 months ago in reply to Kazuto Odajima

TI__Prodigy 290 points

Hi Odajima-san,

Section 5.6 of the TRF1108 datasheet specifies s-parameters till 12GHz and linearity/noise till 10GHz. Please review these performance curves. If the performance is acceptable for your application, certainly it can be used in X-band, since the performance is specified in the datasheet.

Regards,
Srinivas

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TRF1213: S-parameter model (D2D or D2S)