Need solutions to resolve issue related to multiple adc channels

[1979]

Hi to all team members.

I am using nrf51822 working at 16 MHZ clock. 

I have interface  3 sensors ECG, SPO2 and GSR sensor analog output to nrf51822 on 3 respective channels(P0.02, P0.04 and P0.05).

Individual sensors connected to user body gives perfect adc reading.

But when user connect more than one sensor to his body than reading of another adc channel get disturb. We are getting improper adc result respective to voltage. 

Can you please suggest me the solutions for this as early as possible to resolve this issue. As i have to release product resolving this issue.

Thanks and regards, 

Ronak Jain

[Jørgen Holmefjord]

Hi,

Can you post some more details on exactly what the issue is?

• What values are you measuring and what do you expect to get?
• How do you configure the ADC, and how do you trigger the sampling?
• Do you get correct connecting/reading if reading a single channel at a time?
• How do you power the board?
• Is this a custom board? If it is, have you reproduced the issue on the nRF51 DK?

Best regards,
Jørgen