GX18B20 is a domestic digital temperature sensor chip with high adaptability and high performance. It can replace the imported DS18B20 chip 1:1 compatibly, without modifying the original circuit and program, and realize zero threshold replacement. It is the preferred device for domestic upgrading of industrial temperature measurement and civil temperature control scenes. The digital temperature sensor chip supports 9-12bit programmable temperature measurement resolution, and with the programmable nonvolatile storage unit, the upper and lower alarm thresholds of temperature can be set by user, which meets the requirements of various precise temperature measurement and over-limit warning.
In the design of communication and power supply, the digital temperature sensor chip GX18B20 adopts a mature single-bus communication protocol, and only one signal line with ground wire can complete data transmission with the upper computer, and the wiring is simple and efficient. At the same time, it supports parasitic power supply mode, which can directly get power through data lines without external power supply, and is suitable for narrow installation space scenes. Each digital temperature sensor chip is equipped with an independent 64-bit serial number, which supports multi-chip single-bus networking. Only one processor is needed to control multi-channel temperature measurement nodes distributed in a large area, and the distributed temperature measurement ability is outstanding, which is widely suitable for HVAC environment control, building equipment monitoring, grain temperature measurement, industrial process control and other scenarios.
In terms of performance, this digital temperature sensor chip is far superior to imported products of the same type. It adopts the advanced technology of 0.18um EEPROM, and the temperature measuring range covers -55℃~+125℃. Under the normal working conditions of -10℃~70℃, the temperature measuring accuracy can reach 0.4℃. In the 12-bit high-precision mode, the temperature conversion time is as low as 750ms, the conventional conversion speed is stable at 320-500ms, and the static power consumption is only 0.75uA, which is excellent in energy saving. The chip has strong anti-interference ability, with HBM electrostatic protection reaching 8000V and MM protection reaching 800V, which greatly improves the stability of equipment operation.
Compared with MAXIM DS18B20, GX18B20 has achieved an all-round upgrade of accuracy, power consumption and protective performance by virtue of the advantages of domestic technology, and at the same time greatly reduced the procurement and mass production costs, with better compatibility, strong electrostatic protection capability and high reliability. GX18B20 digital temperature sensor chip supports MSOP8, SOP8, TO-92, TO-92S, and is suitable for multiple applications such as board-level temperature measurement, water temperature probe, instrument temperature measurement, indoor temperature control, etc. Relying on tens of millions of stable mass production capacity, it can effectively guarantee the mass supply of various projects, and it is a cost-effective alternative to domestic temperature measurement chips.
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