The core differences between digital sensors and analog sensors are mainly reflected in five dimensions: signal output mode, anti-interference ability, accuracy, intelligence level, and cost. Digital sensors output discrete digital signals through internal analog-to-digital converters, which have high precision, strong anti-interference and programmable characteristics; Analog sensors directly output continuous analog signals, which is lower in cost but more susceptible to environmental interference.
Signal output mode
Digital sensors: convert physical quantities into discrete digital signals through built-in analog-to-digital converters (ADCs) and output them in binary form
Analog sensor: directly outputs continuously changing voltage/current signals, which are linearly related to physical quantities.
Accuracy and anti-interference capability
Digital sensors:
Adopting digital error compensation technology, the accuracy can reach within 0.02%;
Digital signal transmission has strong anti-interference ability and supports long-distance transmission.
Analog sensors:
Due to factors such as circuit noise and temperature drift, the accuracy is relatively low;
The signal attenuation is significant and the transmission distance is limited.
Functional scalability
Digital sensors:
Built in microprocessor and data storage module, supporting calibration, filtering, and data preprocessing;
Digital systems can be directly connected through communication interfaces such as I2C/SPI.
Analog sensors:
The function is single and requires an external ADC module to achieve digital processing.
