Forum Post: RE: ADS1198: ADA1198 sampling rate variation and signal attenuation w.r.t. sampling rate

Hi Alexander Thank you very much for your reply. 1. sampling rate variation looks like coming from varied handling of DRDY by the android sensor framework and we are now investigating it. we will come back if any further questions on this. 2. our input signal is a real muscle EMG signals captured by the sensors attached to the arm skin, so it is 15 to 25Hz. so if the sinc filter has attenuation roll-off, how can we improve it? the datasheet shows that it can be changed by changing DR bits in config1 resister but DR bits actually changes the sampling rate which we want to keep at 250Hz fixed. thank you in advance for your effort.