Hi
In my project, I have a board that includes an ESP32, 4 ADS1115 chips, a SEN55 sensor, and 9 Alphasense gas sensors. All components are powered by a 5V supply coming from another external electronic board. However, there is some noticeable noise on the 5V line."

I know that Alphasense recommends ...

You can design a simple LC low-pass power filter designed to clean a 5V input supply.You can use A ferrite bead or inductor (L1) that blocks high-frequency interference. Two capacitors 10 µF, bulk and C2,100 nF, high-frequency bypass—shunt noise to ground at different frequency ranges. Together ...

If you want a very clean 5 V, I'd start with a switched mode power supply at around 7 V. If you don't have one, use a DC/DC converter to go down to 5 V. Then add a lineair voltage converter to do the last inch from 7 V to 5 V. Make sure you have enough headroom for the LVC to do it's job properly ...

Hi everyone

What is the best 5V input filter circuit to reduce ripple and noise before powering a mixed-signal board with an ADC like ADS1115?

I want to clean the 5V input at the power entry point. Any recommended capacitor values, types, or LC filter suggestions?

any suggestions or example ...

Hello

I'm designing a custom PCB using an ESP32 that communicates over I²C with multiple devices (SEN55 air quality sensor and 4 ADS1115 ADCs) Currently all devices are connected to the same SDA and SCL lines.

Each device datasheet suggests pull-up resistors on SDA and SCL (SEN55 recommends 4.7kΩ ...