NAU7802 PCB layout

Thread Starter


Joined Mar 28, 2020
I think I've done everything I can to make my PCB as quiet as possible... I hope. Note that there is a switch mode power supply on the board but far away. Any suggestions/tips for how I can improve the layout? There is nothing on layer 4 bottom in this area. The ADC is measuring a load cell. The lead wires will be maybe 2 inches long.

Also, I'm wondering why this chip is so inexpensive considering a good instrumentation amplifier chip starts at $10. Even with a perfect PCB layout with a perfect input signal and running inside a faraday cage could this chip produce even close to a 24-bit resolution? I'm thinking that a better 16-bit ADC might be worth considering. Thanks.