In view of the very weak temperature sensor signal, high-precision, low-noise operational amplifiers and high-precision, low-power ADCs are needed. Operational amplifiers are available for selection: MS8551 or MS8601, which has the advantages of low offset (1uV), low noise (22nV√Hz), small package, etc. It has an absolute advantage among domestic brands.

ADC is available: MS1112 or MS1100, with high precision (16bit), multi-channel, low power consumption (<1uA), IIC interface, internally integrated 2.048V reference source, small package, etc.

MCUs are available: MS616F512, built-in LCD, 16-bit single-chip microcomputer, low power consumption, built-in low-voltage detection, minimum working (1.8V) and other advantages;

The temperature measurement program uses a full set of Ruimeng products, the application is more stable and the collocation is more reliable.

The schematic diagram is attached. If you need PCB drawing, please contact our FAE

額溫槍方案_V2.0.pdf

額溫槍方案_V1.0.PDF