circuit
Full Member level 2
I am designing a four layer board with layer 1 and 4 for signal and 2 is ground plane and 3 is power plane ( followed this from analog devices eval board which i am partly replicating in my design since I am using the same ADC chip)
I am having a single 6V power coming in to the board using an adapter and this i am splitting into the required analog an digital vdd's using appropriate voltage regulators. there are 2 analog vdd's and 2 digital vdd's in my system. say analog 2.5V and digital 3.5V for my sensor and analog 3V and digital 3V for my ADC.
Now i have to split the power plane into 4 islands intellegently such that I can place the components and directly put a via from their respective pins to the voltage plane. Here should I have the analog planes together and digital planes together ? (I am having only one ground plane )
ADC has to be positioned at the end of the board with the digital signals going to a connector which sits on another board. Sensor has all its outputs on one side. i am attatching the way i have to place the components
I will run the board at a max clock of 20 MHz
I am having a single 6V power coming in to the board using an adapter and this i am splitting into the required analog an digital vdd's using appropriate voltage regulators. there are 2 analog vdd's and 2 digital vdd's in my system. say analog 2.5V and digital 3.5V for my sensor and analog 3V and digital 3V for my ADC.
Now i have to split the power plane into 4 islands intellegently such that I can place the components and directly put a via from their respective pins to the voltage plane. Here should I have the analog planes together and digital planes together ? (I am having only one ground plane )
ADC has to be positioned at the end of the board with the digital signals going to a connector which sits on another board. Sensor has all its outputs on one side. i am attatching the way i have to place the components
I will run the board at a max clock of 20 MHz