The Application Study Of Silicon Piezoresistive Sensor's Smart Compensation And Calibration System Based On MAX1457

Silicon piezoresistive sensors are widely used for pressure measure. Consistency, temperature shift and non-linearity are ubiquitous because of semiconductor's inherent characteristics. Compensation and calibration are needed for piezoresistive sensor's output voltage. Based on studying traditional compensating technique, in virtue of the smart analog-digital-mixed signal conditioning technique, the smart error compensation system is designed with MAX1457 as its core. The issues of consistency, temperature shift and non-linearity are solved by the system which is composed of hardware and software. An output error factor of Silicon piezoresistive sensor is achieved within 0.2%. The main contents to be studied and solved are shown as follows: designing scheme of the error compensation system, studying and designing the signal conditioning circuit, designing the data-acquisition circuit, designing and realizing the MAX1457 software development system.The compensating circuit is designed in virtue of the signal conditioning chip MAX1457 as its core. The data-acquisition circuit is designed in virtue...