External 90º Hybrid for HMC525ALC4

Hi Ghozal,

Yes you could 50 ohm terminate an IF port and use the other IF port... Or better you could use any double balanced mixer from our portfolio:

www.analog.com/.../10711

Thanks,

Taz

Hi, thanks for your answer. But I can't see the complete link which you've given in your comment. So, is it ok to use one port without external 90º Hybrid? Are there any consequences if I don't use it?

Thanks,

Ghozali Hadi

Hi,

Using only one IF port without the hybrid would mean that you would have 3dB additional conversion loss. The hybrid is needed for image rejection. However you would lose the image rejection capability if using only one IF port.

I think for your application these mixers would fit better:

HMC1048A (only for downconversion)

HMC129A.

HMC218B,

HMC219B,

HMC557A,

HMC787A,

LTC5548,

LTC5552.

Thanks,

Taz

Hi,

Using only one IF port without the hybrid would mean that you would have 3dB additional conversion loss. The hybrid is needed for image rejection. However you would lose the image rejection capability if using only one IF port.

I think for your application these mixers would fit better:

HMC1048A (only for downconversion)

HMC129A.

HMC218B,

HMC219B,

HMC557A,

HMC787A,

LTC5548,

LTC5552.

Thanks,

Taz

Ok, many thanks Taz,

Ghozali Hadi

Hi Taz,

I want to ask another question. I am interested in using LTC5548. But when I checked the eval-board it uses balun TC1-1-13M+ whose range is 4.5MHz-3GHz while my expected IF is in 10kHz-100kHz. Is it possible for me to request custom LTC5548 board with a balun in 10kHz-100kHz range? 

Thanks,

Ghozali Hadi

Hi shsiao,

Can you comment on the above question regarding the LTC5548?

Thanks,

Taz

Hi,

Custom evaluation board should be requested through your local ADI sales office. However, you can purchase standard evaluation board online at:

https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/dc2461a.html#eb-documentation

Thank you.

Hi shsiao,

Thanks for your reply. Actually I'm also considering replacing the balun manually using T1-6-KK81+ or TT1-6-KK81+ but I'm not sure about the matching impedance because both of them have different configurations with TC1-1-13M+. Do you know how to match impedance using T1-6-KK81+ or TT1-6-KK81+?

Thanks,

Ghozali Hadi