MAX31850
Cold-Junction Compensated, 1-Wire Thermocouple-to-Digital Converters
Accurate 1-Wire Thermocouple-to-Digital Converter ICs Ease Design Effort and Lower System Cost
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Overview
Features and Benefits
- Integration Reduces Design Time and Lowers System Cost
- 14-Bit, 0.25°C Resolution
- Integrated Cold-Junction Compensation
- Available for Multiple Thermocouples Types: Supports K-, J-, N-, T-, and E-Type (MAX31850); S- and R-Type (MAX31851)
- Detects Thermocouple Shorts to GND or VDD
- Detects Open Thermocouple
- 1-Wire Multiddrop Capability Simplifies Multisensor Systems
- 1-Wire Interface (Read-Only); Power Can Be Obtained from Interface (Parasite-Powered Mode)
Product Details
The MAX31850/MAX31851 cold-junction compensated, 1-Wire® thermocouple-to-digital converters perform cold-junction compensation and digitize the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The converters resolve temperatures to 0.25°C, allow readings as high as +1768°C and as low as -270°C, and exhibit thermocouple accuracy of 8 LSBs (2°C) for temperatures ranging from -200°C to +700°C.
Communication with the master microcontroller is over a 1-Wire bus that by definition requires only one data line (and ground) for communication. Operating power can be obtained directly from the data line (“parasite power”), eliminating the need for an external power supply.
Each device has a unique 64-bit serial code, which allows multiple units to function on the same 1-Wire bus. Therefore, it is simple to use one microcontroller (the master device) to monitor temperature from many thermocouples distributed over a large area.
Four location address inputs simplify mapping of individual units to specific locations.
Applications
- Appliances
- HVAC
- Industrial
- Medical
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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MAX31850 Reliability Data1/12/2023PDF21K
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX31850JATB+ | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX31850JATB+T | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX31850KATB+ | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX31850KATB+T | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX31850TATB+ | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX31850TATB+T | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| Wafer Fabrication Data | MAX31850 Reliability Data |
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.