mucko
Member level 1
Hi All,
I am designing a mixed signal system board that consists of 3 grounds and each system needs different regulated power supplies (3.3,2.5V for DGND,15V and 2.8V for AGND). The main input voltage is 24V. PCB is 2 layer. I have designed ground layout as shown in the attached picture. My question is that, how to distribute power supply lines to these islands without causing any interference or current loop. Also,
how to place voltage regulators :
* 15V regulator in AGND plane or Power Plane
* What will be the return current in each cases above?
* How Analog power line (15V) must be routed ?
Regards.
I am designing a mixed signal system board that consists of 3 grounds and each system needs different regulated power supplies (3.3,2.5V for DGND,15V and 2.8V for AGND). The main input voltage is 24V. PCB is 2 layer. I have designed ground layout as shown in the attached picture. My question is that, how to distribute power supply lines to these islands without causing any interference or current loop. Also,
how to place voltage regulators :
* 15V regulator in AGND plane or Power Plane
* What will be the return current in each cases above?
* How Analog power line (15V) must be routed ?
Regards.