describe

This ti validation design is applicable to electrocardiogram (ECG). ECG is a method of measuring cardiac electrical activity, which requires high-precision analog front-end instrument gain stage, filtering and high-resolution digital conversion. This design adopts a certain method to design a lead I ECG measurement system from multiple discrete analog components. Through an instrument front-end using opa2333, ultra-low power consumption is optimized and digitized by 18 bit ads8881.

characteristic

18 bits, 10ksps sampling rate

200Hz ECG signal

Optimization: ECG

Power: 1.5MW when avdd = 3.3V

Using ads8881 (18 bit, 1msps SAR ADC), opa2333 (input / INA), opa313 + ref3330 (Reference)

Schematic / block diagram

Data acquisition module implemented by discrete lead I ECG (for ECG system)

Data acquisition module implemented by discrete lead I ECG (for ECG system)

Data acquisition module implemented by discrete lead I ECG (for ECG system)

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