Hi,our pcb is smaller and we don't want place negative voltage on pcb.Can I set the HMC8410 Vgg voltage to 0V?There isn't more information about the Vgg voltage range.Thanks.
I talked with someone from design who estimated that a quiescent Idd near 300 mA could result if operating with Vgg1=0V. As asingla correctly pointed out, under that condition you would probably burn up the device.
If you are using the die version of the part then it might be possible to effectively generate a "negative" Vgg1 voltage (i.e. a Vgg1 more negative than the device ground) while using only a positive supply by "floating" the part such that Vgg1 connects to your system ground while the device ground is lifted above ground by placing it on the upper plate of a capacitor. This concept is presented in the attachment to the EZ thread linked below:
You need to adjust the Vgg for getting Idq = 65 mA. In Figure 33 of the datasheet you can see that the Vgg voltage for this current will be around -0.53V. It is mandatory to place a negative voltage. If not, you will probably burn the device. In page 13 of the datasheet you will find the recommended bias sequencing and the typical application circuit.
Ok and thanks for your help.However I found that the chip HMC902 Vgg can setted 0V for 80mA Idd
Ok and thanks for your help.
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