Click here to ask about the production status of specific part numbers. MAX31825 1-Wire Temperature Sensor with 1C Accuracy General Description Benefits and Features The MAX31825 temperature sensor provides 8-bit to 1-Wire Interface Requires Only One Port Pin for 12-bit Celsius temperature measurements with better than Communication 1C accuracy from 0C to +70C and 1.75C from -45C Unique 64-bit Serial Code Stored in an On-Board to +145C. ROM External Resistor Selects Address for Location The sensor communicates over a 1-Wire bus that, by Identification definition, requires only one data line (and ground) for Can Be Powered from Data Line communication with a microcontroller. In addition, the sen- Power Supply Range Is 1.6V to 3.6V (External sor can derive power directly from the data line (parasite Power), 2.3V to 3.6V (Parasite Power) power), eliminating the need for an external power sup- Measures Temperatures from -45C to +145C ply. Better than 1C Accuracy from 0C to +70C Each sensor has a unique 64-bit serial code, which allows Better than 1.75C Accuracy from -45C to +145C multiple MAX31825 ICs to reside on the same 1-Wire bus. Alarm Output for Detection of Temperature Faults In addition, it includes two address input pins that, using Temperature Resolution is Selectable from 8 to 12 an external resistor and pin-strapping, allow one of 64 dif- Bits ferent addresses to be selected to identify each sensor s Converts Temperature to 10-Bit Digital Word in 80ms physical location. Therefore, it is simple to use one micro- (max) processor to control many devices distributed over a large User-Definable Alarm Settings area. 4kV HBM ESD Protection The MAX31825 is available in a 6-bump WLP package. Available in a 6-Bump WLP The power supply voltage range is from 1.6V to 3.6V for Ordering Information appears at end of data sheet. external power supplies, and from 2.3V to 3.6V for para- site power. The operating temperature range is from -45C to +145C. Applications Industrial Equipment Communications Equipment Data Center Equipment Consumer Equipment 19-100748 Rev 1 10/20 MAX31825 1-Wire Temperature Sensor with 1C Accuracy Typical Application Circuit TO OTHER 1-WIRE DEVICESTO OTHER 1-WIRE DEVICES VVDDDD VV PUPU VVPUPU 4.7k4.7k 4.7k4.7k DQDQ ALARMALARM I/OI/O MCUMCU MAX31825MAX31825 VV DDDD ADD0ADD0 RADDRADD GNDGND ADD1ADD1 www.maximintegrated.com Maxim Integrated 2