Part Number: LMG1020
Hello,
I'm carefully reading the decoupling recommendations of the LMG1020.
In the datasheet :
Figure 16 presents a layout of LMG1020 with a 0.1 µF feed-through capacitor (C1) and a larger 1uF capacitor (C3) for decoupling. In this design, the feed-through capacitor C1 is placed in a shunt-through manner for lower noise decoupling, and C3 is placed next to C1.
After reading some documentation about the "shunt-through manner" to use a feed-through capacitors (https://product.tdk.com/en/techlibrary/solutionguide/3tf04.html), is appears to be a good idea. But it's just impossible to do that and place both capacitors terminal very close to the LMG1020.
The Figure 16 is effectively showing a feed-through capacitor connected as mentioned, but it looks like the capacitor is inverted : the central pad (commonly used as GND) is the Vdd, and the 2 externals pads are GND. I have never seen this usage of this kind of capacitor. It solves the layout challenge but is it really a good idea?
The devkit use a 0603, 470nF feed-through capacitor rated to 4A, used in the classical manner.
Any light appreciated :)
Thanks
