HMC863ALC4 dc supply

Hi IBMOTO,

              Pin 1 is VGG and Pin7 is VDD. If you are using the customer EVB then, yes Pin 1 and Pin 7 of J3 are the only way to apply dc to the chip

Regards,

Jim B

Thank you for answer.

But what is the function of 6 orders pins of J3 ?

Hi IBMOTO,

                       This board is used for multiple products.  Pins 2, 4, 6, 8 are ground, Pins 3-5 are unused in this HMC863A application. So there are traces connecting to pins 3-5 for use with different products.

Regards,

Jim B 

I don't understand well,

One day, I ask some question about HMC864ALC4 supply.

You answer my here    HMC863ALC4 and HMC752ALC4 supply voltage - Q&A - RF and Microwave - EngineerZone (analog.com).

In your explications, you used 2 volages generators to supply equipment.

To supply VGG, you used  negative born of volatge generator and you put positve born on the GND.

I would like to know, 

It is one GND J3 pins that you connect to positive born of voltage generator ?

Hi IBMOTO,

        Yes, connect the + of the power supply used for the gate to pin 2,4,6, or 8 of J3.

and the drain + goes to pin 7 and - of the drain power supply goes to pin 2, 4, 6, or 8.

Regards,

Jim B

Thank You Mister Jim, I am glad.

My last question consern amplifier LNA ( HMC752ALC4).

What pins I must use for GND when I supply VDD. and the order hand VGG  ?

Hi IBMOTO,

                        For the HMC752, GND is the pin directly below VG2. Drain and gate pins are labeled.

Regards,

Jim B

Hi IBMOTO,

                        For the HMC752, GND is the pin directly below VG2. Drain and gate pins are labeled.

Regards,

Jim B

I can't see well, can you please circle the GND in the figure?

When you say '' Drain and gate pins are labeled. '', what does mean that ?

VDD and VGG have the same GND ?

Use the same pin on the EVB for the -of the drain supply and the + of the gate supply.

Ground pin is circled in red.

THANK YOU SINCERLY FOR ALL ANSWERS