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About OPT3 of TRF37B75

yoshihiro hirata
Expert 1425 points
Other Parts Discussed in Thread: TRF37B75

Please tell me OPT3 of TRF37B75 when we use TRF37B75 at 30MHz and VCC=5V.

We referred to Figure 7. OIP3 vs Frequency of datasheet P.7.
However, we couldn't get exact value of OPT3. For example 32.4dBm...
We consider that it is important value for our system.

Best regards,

Yoshihiro Hirata

  • 0
    TI__Genius 13935 points

    Hello Hirata-san,

    I will have to research this.  I am supporting this product but it was designed in another group.  The datasheet specifies the frequency range as 40MHz to 4000MHz.  This may mean that the part has not been measured at 30MHz yet.  According to the datahseet plots the OIP3 drops rapidly at low frequencies.  I do not know if this is due to the coupling capacitors or the RF choke, but performance should be better at lower frequency if the recommended values are increased.  

    What frequency range do you requre?  Is high frequency performance important as well? 

     

    Regards,

    Loren

     

  • 0 in reply to Loren Siebert 1
    Expert 1425 points
    Hi Loren-san,

    Thank you for your reply.

    >What frequency range do you requre?
    --> Frequency range is 100kHz to 30MHz.

    Regards,
    Yoshihiro Hirata
  • 0 in reply to yoshihiro hirata
    Expert 1425 points

    Loren-san,

    Please let me your situation.

    Best regard,
    Yoshihiro Hirata

  • 0 in reply to yoshihiro hirata
    TI__Intellectual 2100 points
    Hi team,My customer who is Furuno is interesting TRF37B75.
    They would like to confirm OIP3 at 30MHz.
    So, could you please share the OIP3 data at 30MHz, if you have?
    It is very helpful for me to promote this device.
    or if you have any more fitting devices please let me know.
    Cutomer requirement specification is as below.Power supply:5V single
    Gain setting: 8 to 10dB OP1: 14dBm or more @1.6 to 30MHz
    Could you please reply your comment?Thank you and best regards,Yuki