Highly integrated analog front-end signal conditioning circuit diagram

 　　The circuit shown in the figure below is a complete and highly integrated analog front-end industrial-grade signal conditioner that utilizes a 16-bit differential input PulSAR ADC to digitally convert ±10 V industrial-grade signals. This circuit uses only two analog components to provide a high-impedance instrumentation amplifier input, level translation, attenuation, and differential conversion with high common-mode rejection (CMR) performance. Due to its high level of integration , this circuit saves printed circuit board space and provides a cost-effective solution for common industrial applications.

　　In process control and industrial automation systems, typical signal levels are up to ±10 V. Signal inputs from sensors such as thermocouples and load cells are smaller, so large common-mode voltage swings are often encountered, This requires flexible analog inputs that can handle small and large differential signals with high common-mode rejection while having high impedance inputs.