When the ADL5330 is powered on, the chip becomes very hot, but the current is still around 0.1A. And the gain adjustment is not very good,...

LINxuan888

When the ADL5330 is powered on, the chip becomes very hot, but the current is still around 0.1A. And the gain adjustment is not very good,... [Copy link]

Jacktang

The chip gets very hot when powered on

To determine whether the voltage-controlled variable gain amplifier is working, in this case, first check the power supply of the part, eliminate the power supply and then find other reasons.

tagetage

Current, Nominal ActiveVGN= 0 V 100mA VGN= 1.4 V 215 mA

Your current seems to be normal. If the current is normal, the heat is also normal.

tagetage

What is the operating frequency of your circuit? What brand are the high-frequency capacitors you use?

tagetage

If you are working at a high frequency above 1G, PCB layout and high-frequency component selection are very important. It is recommended that you carefully read the Evaluation Board, component selection and layout suggestions.

wangerxian

The circuit is the same as the recommended circuit, so it is a problem of PCB design.

呜呼哀哉

It is probably a PCB design problem. The thermal parameters of the chip were not carefully considered, which caused the static current of the chip to cause the temperature to rise. Perhaps it has entered thermal protection.