Design Support


This article discusses the thermal noise source of electrocardiogram (ECG) applications based on the ADS1298 and ADS1298R family of multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs). This report offers several observations on identifying the major sources of thermal noise in an ECG system, and makes several recommendations regarding how to improve thermal noise performance.