Other Parts Discussed in Thread: ADS1292, INA118, LP5907
Hi,
I am using an ADS1292R for reading EMG signals with 3 Electrodes, I made a PCB which connects to a microcontroller (Teensy), the system is battery powered.
I have used a signal generator to inject signals from 10uV to 10 mV to the ADS1292 and also connected the electrodes to a muscle. First, I have observed that a gain of 12 is not enough, part of the signal is in the noise level. Second, When I use the electrodes on me I notice the signals has an offset even though I use the OFFSETCAL command.
So here are my questions:
1. Could you guys advice on how to do a pre-amplication stage?
2. Is the INA118 a good option ?
3. What about the RLD signal? How do I route it to the INAMP?
Here is the Schematic of the sensor board:
Best Regards.
Carlos