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HMC439 loop filter op-amp for wide bandwidth PLL

Question asked by anhchu_ite on May 29, 2018
Latest reply on Jul 18, 2018 by anhchu_ite



I am designing a wide bandwidth PLL (fout 38.4GHz, external divider-by-32, kVCO 0.6GHz/V, f_pfd=1.2GHz, bandwidth 150MHz) with HMC439 as phase-frequency detector. Can you put some suggestions on how to select the loop filter op-amp? Which op-amp parameters are important (GBW, supply voltage, slew rate)? Or can you suggest one op-amp for my design?


Many thanks and regards,