Key Features
- 1-wire digital temperature sensor: DS18B20
- Up to 12 bits of precision from the onboard digital-to-analog converter
- Work great with any microcontroller using a single digital pin
- Each has a unique 64-bit ID burned in at the factory to differentiate them
- Uses the Dallas 1-Wire protocol
These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.
The only downside is they use the Dallas 1-Wire protocol, which is somewhat complex, and requires a bunch of code to parse out the communication. There's a great Arduino library for 1-Wire, but some microcontrollers do not have support for 1-Wire so be sure to check!
We toss in a 4.7k resistor, which is required as a pullup from the DATA to VCC line when using the sensor.
Item Specifics
1 - DS18B20 Sensor
1 - 4.7k resistor
Usable temperature range: -55 to 125°C (-67°F to +257°F)
9 to 12 bit selectable resolution
Uses 1-Wire interface- requires only one digital pin for communication
Unique 64 bit ID burned into chip
Multiple sensors can share one pin
±0.5°C Accuracy from -10°C to +85°C
Temperature-limit alarm system
Query time is less than 750ms
Usable with 3.0V to 5.5V power/data