Product Summary

The DS18B20 Digital Thermometer provides 9 to 12-bit (configurable) temperature readings which indicate the temperature of the device. Information is sent to/from the DS18B20 over a 1-Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS18B20. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source. Because each DS18B20 contains a unique silicon serial number, multiple DS18B20 can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and process monitoring and control.

Parametrics

DS18B20 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: -0.5V to +6.0V; (2)Operating Temperature: -55℃ to +125℃; (3)Storage Temperature: -55℃ to +125℃.

Features

DS18B20 features: (1)Unique 1-Wire interface requires only one port pin for communication; (2)Multidrop capability simplifies distributed temperature sensing applications; (3)Requires no external components; (4)Can be powered from data line. Power supply range is 3.0V to 5.5V; (5)Zero standby power required; (6)Measures temperatures from -55℃ to +125℃. Fahrenheit equivalent is -67°F to +257°F; (7)±0.5℃ accuracy from -10℃ to +85℃; (8)Thermometer resolution is programmable from 9 to 12 bits.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS18B20
DS18B20

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20/T&R
DS18B20/T&R

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20+
DS18B20+

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $3.59
1-25: $2.39
25-50: $1.45
50-100: $1.42
DS18B20+PAR
DS18B20+PAR

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $3.59
1-25: $2.39
25-50: $1.45
50-100: $1.42
DS18B20+T&R
DS18B20+T&R

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1: $2.74
1-25: $2.06
25-50: $2.00
50-100: $1.81
DS18B20-PAR
DS18B20-PAR

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20-PAR/T&R
DS18B20-PAR/T&R

Maxim Integrated Products

Board Mount Temperature Sensors

Data Sheet

Negotiable 
DS18B20-PAR+T&R
DS18B20-PAR+T&R

Maxim Integrated Products

Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr

Data Sheet

0-1585: $1.27
1585-2000: $1.27