I was developing a project with Ad8232. I made the pcb from the data sheet. and I am recording the output with arduino. But all I read is noise. Can anybody tell what is wrong with my circuit.
Thank you for using the AD8232 for your project.
I think we'll need more details regarding your circuit in order to help you out effectively. Can we get the voltage levels/configuration on the AD8232 inputs (VCC, RA, LA, etc.)? And how are you measuring using the output using your Arduino?
Though, one thing to quickly try out is to tie the SDN pin to your VCC as this is mentioned on the page 21 of the datasheet.
Best Regards, Dann
Many thanks for your time. I had connected Vcc to 3.3V and RA, LA and RL with ECG test leads to my body using those sticky ECG pads. One thing I should mention though. This part of the circuit is being made on flexible, transparent substrate, (PU) which do not have any ground plane in the bottom side. Also the2.5mm female jack for RA, LA and RL is not place very close but connection is made from the PCB substrate to the female jack using unshielded wires (around 10cm) and then the ECG leads are connected tot he female jack. Could this the source of noise? Also I tried to read the voltage level at the LOD+ and LOD- pins using a multimeter, I only read 0V even when the leads are disconnected.
I was measuring the output through a Arduino. Even the voltage was being supplied from 3.3v output pin of arduino. and ground is common.
Hi Dibyendu007 ,
I have the same problem as https://ez.analog.com/amplifiers/instrumentation-amplifiers/f/q-a/542674/ad8232-output-questions