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HMC870 HMC871

Question asked by ADIguy on Jun 16, 2015
Latest reply on Jun 19, 2015 by kcheng6974



The HMC870, and HMC871 data sheets recommended a power sequence that conflicts with the Absolute Max Spec Table.The HMC870 and HMC871 both recommended a power up sequence as follows:

1). Set Vgg -2v;

2). Set Vctl +1;

3). Set Vdd +5.

However, the absolute max ratings section of data sheet states that Vctl is (Vdd-7) to Vdd (v). This implies that Vctl can't be established

until after Vdd is applied. What is the solution and how do I resolve this? Thanks.


Best Regards.