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MAX31722, MAX31723

Digital Thermometers and Thermostats with SPI/3-Wire Interface

Industry's First Low-Voltage 3-Wire/SPI Temperature Sensors Enable Easy Implementation Into Low-Power Systems
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Status Explanations for product status codes

Part Number Status
MAX31722 Active: In Production. See Ordering Information for details.
MAX31723 Active: In Production.


The MAX31722/MAX31723 digital thermometers and thermostats with an SPI™/3-wire interface provide temperature readings that indicate the device temperature. No additional components are required; the devices are truly temperature-to-digital converters. Temperature readings are communicated from the device over an SPI interface or a 3-wire serial interface. The choice of interface is selectable by the user. For applications that require greater temperature resolution, the user can adjust the readout resolution from 9 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be detected quickly. The thermostat has a dedicated open-drain output (active-low TOUT). Two thermostat operating modes, comparator and interrupt, control thermostat operation based on user-defined nonvolatile trip points (THIGH and TLOW). Both devices feature a 1.7V to 3.7V supply rail.

Data Sheet

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An evaluation board is available: MAX31723PMB1 MAXPMBAE

Key Features

  • Temperature Measurements Require No External Components
  • Measures Temperatures from -55°C to +125°C
  • MAX31722 Thermometer Accuracy is ±2.0°C
  • MAX31723 Thermometer Accuracy is ±0.5°C
  • Thermometer Resolution is Configurable from 9 to 12 Bits (0.5°C to 0.0625°C Resolution)
  • Thermostat Output with User-Defined Nonvolatile Thresholds
  • Data is Read from/Written to by SPI (Modes 0 and 2) or 3-Wire Serial Interface
  • 1.7V to 3.7V Power-Supply Range
  • Available in 8-Pin μMAX® Package

Key Specifications:

Temperature Sensors
Part Number Sensor Type Alarm Output Functions Interface Accuracy
Parasite Pwr. Temp. Thresh. Temp. Resolution
Oper. Temp.
See Notes
MAX31722  Local Overt
Single Temperature Alarm
Standalone Thermostat
2 No Programmable (NV) 12 -55 to +125 $1.02 @1k
MAX31723  0.5 $1.80 @1k
See All Temperature Sensors (111)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX31722, MAX31723: Functional Diagram
Functional Diagram

More Information

New Product Press Release   2012-02-09 ]

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Information Index

Document Ref.: 19-5629 Rev 0; 2010-11-16
This page last modified: 2010-11-16