3 Pin Temperature Sensor DS18B20 Programmable Resolution 1- Wire Digital Thermometer GXCAS18B20 9-12bits TO-92

3pin Temperature Sensor DS18B20 Programmable Resolution 1-Wire Digital Thermometer GXCAS18B20 9-12bits TO-92

GX1820 is perfectly compatible with DS18B20, which is more accurate and shipments exceed 10 million. Many Chinese grain A -level suppliers use this chip as food, tobacco, port, water temperature and other fields.

The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to +/-0.5C over the range of –10°C to +85°C. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1–wire bus; thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment or machinery, and process monitoring and control systems.

PIN DESCRIPTION GND - Ground DQ - Data In/Out VDD - Power Supply Voltage NC - No Connect

It is always used for temperature sensor assembly, welded to silicone cable then encapsulated in stainless steel tube .

- Unique 1-Wire interface requires only one port pin for communication

- Each device has a unique 64-bit serial code stored in an onboard ROM

- Multidrop capability simplifies distributed temperature sensing applications

- Requires no external components

- Can be powered from data line. Power supply range is 3.0V to 5.5V

-Measures temperatures from –55°C to +125°C (–67°F to +257°F)

- +/-0.5C accuracy from –10°C to +85°C

- Thermometer resolution is user-selectable from 9 to 12 bits

- Converts temperature to 12-bit digital word in 750ms (max.)

- User-definable nonvolatile (NV) alarm settings

- Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)

- Available in 8-pin SO (150mil), 8-pin SOP, and 3-pin TO-92 packages

- Software compatible with the DS1822

- Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system

1. Data collector
2. Transmitter
3. Automation process control
4. Automotive industry
5. Building control & HVAC
6. Electricity
7. Measurement test
8. Medical beauty equipment
9. Grain monitoring
10. The tobacco industry

11. Water temperature thermal energy control

12. Cold chain warehousing

13. body temperature humidifier

14. Smart agricultural equipment

15. Overseas cabinet room base station

16. White home appliances

Comparision between DALLAS MAXIM DS18B20 and GX18B20 (GALAXY-CAS)