DS18B20+PAR - Analog Devices

DS18B20+PAR Frequently Asked Questions (FAQs)

• What is the maximum cable length for the DS18B20+PAR?
  The maximum cable length for the DS18B20+PAR is 100 meters, but it's recommended to keep it as short as possible to minimize signal degradation and noise.
• Can I use multiple DS18B20+PAR sensors on the same bus?
  Yes, you can use multiple DS18B20+PAR sensors on the same bus, but each sensor must have a unique address. The DS18B20+PAR has a unique 64-bit serial code that allows multiple sensors to be connected to the same bus.
• How do I handle parasite power mode?
  In parasite power mode, the DS18B20+PAR derives its power from the data line. To handle this mode, ensure that the data line is pulled high to VCC through a resistor (typically 4.7kΩ) and that the VCC pin is left unconnected.
• What is the accuracy of the temperature measurement?
  The DS18B20+PAR has an accuracy of ±0.5°C from -10°C to +85°C, and ±1°C from -40°C to +125°C. However, this accuracy can be affected by factors such as sensor calibration, noise, and thermal gradients.
• How do I convert the temperature data to Celsius or Fahrenheit?
  The DS18B20+PAR returns temperature data in a 16-bit signed integer format, where 1 LSB represents 0.0625°C. To convert this to Celsius, simply multiply the integer value by 0.0625. For Fahrenheit, multiply the Celsius value by 1.8 and add 32.