Dear Sir ,
HMC5445 has the positive(Vdd) and negative (Vgg) power supply.
Does it need to care about power sequence (Even I knew my working voltage such as vdd=5V/vgg=-1 has the best performance) ?
According to internal document ," MMIC AMPLIFIER BIASING PROCEDURE", that points out it should be adjustment the negative power supply first in procedure .
So could you help me to clarify this question, tks!
YEs you should follow power up and down sequence.
Please refer to the FAQ on the link below, especially Q5 and Q6.
FAQ on Hittite Microwave RF/MW Amplifiers from ADI