MAX31725

±0.5°C Local Temperature Sensors

Ultra-Accurate Temperature Sensor Offers ±0.5°C (max) Accuracy Over a Wide -40°C to +105°C Range


Please check latest availability status for a specific part variant.

Description

The MAX31725/MAX31726 temperature sensors accurately measure temperature and provide an overtemperature alarm/interrupt/shutdown output. These devices convert the temperature measurements to digital form using a high-resolution, sigma-delta, analog-to-digital converter (ADC). Accuracy is ±0.5°C from -40°C to +105°C. Communication is through an I2C-compatible 2-wire serial interface.

The I2C serial interface accepts standard write byte, read byte, send byte, and receive byte commands to read the temperature data and configure the behavior of the open-drain overtemperature shutdown output.

The MAX31725 features three address select lines with a total of 32 available addresses. The MAX31726 features two address select lines with a total of 16 available addresses and an active-low RESET input. The sensors have a 2.5V to 3.7V supply voltage range, low 600µA supply current, and a lockup-protected I2C-compatible interface that make them ideal for a wide range of applications, including PCs, electronic test equipment, and office electronics.

Both devices are available in an 8-pin TDFN package and operate over the -55°C to +150°C temperature range.

MAX31725: Typical Application Circuits MAX31725: Typical Application Circuits Enlarge+

Key Features

  • High Accuracy and Low-Voltage Operation Aids Designers in Meeting Error and Power Budgets
    • ±0.5°C Accuracy from -40°C to +105°C
    • 16-Bit (0.00390625°C) Temperature Resolution
    • 2.5V to 3.7V Supply Voltage Range
  • One-Shot and Shutdown Modes Help Reduce Power Usage
    • 925µA (max) Operating Supply Current
  • Extended Temperature Range Enables Measurements in High Temperature Systems (Measures Up to +150°C)
  • Digital Functions Make Integration Easier into Any System
    • Selectable Timeout Prevents Bus Lockup (Default Enabled for MAX31725; Default Disabled for MAX31726)
    • Separate Open-Drain OS Output Operates as Interrupt or Comparator/Thermostat Output
    • RESET Input (MAX31726)

Applications/Uses

  • Industrial
  • Networking
  • Servers
  • Telecom

See parametric specs for Temperature Sensors (113)


Part NumberSensor TypeAlarm OutputFunctionsInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX31725 LocalOvert-2-Wire/I2C/SMBusOne0.5NoProgrammable16Yes-55 to +150
TDFN/8
$1.34 @1k
MAX31726 Hardware Reset
TDFN/8

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.
Product Reliability Reports: MAX31725.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

Related Resources


MAX31825
1-Wire® Temperature Sensor with ±1ºC Accuracy

  • 1-Wire Interface Requires Only One Port Pin for Communication
  • Unique 64-bit Serial Code Stored in an On-Board ROM
  • External Resistor Selects Address for Location Identification

MAX31889
±0.25°C Accurate I2C Temperature Sensor

  • High Accuracy
  • Long Battery Life
  • Small Size

MAX86916
Integrated Optical Sensor Module for Mobile Health

  • Miniature 3.5mm x 7.0mm x 1.5mm, 14-Pin Optical Module
  • Optical-Grade Glass for Long-Term Optimal and Robust Performance
  • Ultra-Low-Power Operation for Mobile Device

MAX25205
Gesture Sensor for Automotive Applications

  • Low-Cost, Flexible Gesture-Sensing Solution for Automotive Applications
  • Low-Power, Low-Cost External CPU Processes Sensor Output
  • Supports Swipe, Rotation, and Proximity Gestures

MAX86170B
Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor AFE for Wearable Health

  • Complete Single-Channel Optical Data Acquisition System
  • Ultra Low-Power Operation for Wearable Devices
  • Excellent Top-End Dynamic Range > 91dB in White Card Loop-Back Test (Nyquist Sample-to-Sample Variance)

MAXREFDES103
MAXREFDES103#: Health Sensor Band