I am working on a high speed data aquistion system. The low power RF signal of interest is DC coupled and therefore I was thinking of using the HMC544A as a switch. The datasheet looked promising (DC - 4GHz) until I have found the section that DC blocks are required. Using DC block capacitors is not an option. Would it be worth a try to leave out the DC blocks?
Thanks and best regards,
HMC544 requires DC blocking capacitors at RF port when RF lines have DC voltage of 0 V.
Can you provide me with the following information? I will check if you can use HMC544A without DC blocking capacitor in your application.
- DC voltage level of RF signal
- Minimum frequency of operation
- Maximum RF signal power
thanks for your help!
I checked with my system and the following conditions will apply:
- DC voltage level of RF signal --> up to 1.5V
- Minimum frequency of operation --> Down to 0Hz
- Maximum RF signal power --> Max. 17dBm
I hope this will help you.
Thanks in advance for your help!
We have no RF switches including HMC544A that will handle DC bias of 1.5 V at the RF ports.