Part Number:ADS1298
I had designed an EMG amplifier using ADS1298. I am having certain issues with the output. When measuring an internally generated test signal I am getting a square wave. When I am applying a sine wave signal between 1N and 1P and the gain setting is kept at 1, Electrode is normal operation, channel input is normal electrode, the shape of the sine wave is not correct.
In order to further check the hardware, I simply connected the 1N and 1P pins in the following patterns and i got the output
1P not connected(NC), 1N gnd, output 0V
1P NC, 1N 3.3V, output 1.2V
1P gnd, 1N NC, output 2.4V
1P 3.3V, 1N NC, output 1.2V
The schematic of the diagram, input waveform and the output waveform obtained are attached along with