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


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
Part Number Sensor Type Alarm Output Functions Interface Channels Accuracy
(±°C)
Parasite Pwr. Temp. Thresh. Temp. Resolution
(bits)
Multi Droppable Oper. Temp.
(°C)
Package/Pins Budgetary
Price
See Notes
MAX31726  Local Overt Hardware Reset 2-Wire/I2C/SMBus One 0.5 No Programmable 16 Yes -55 to +150
TDFN-EP/8
$1.28 @1k
MAX31725  -
TDFN-EP/8
See All Temperature Sensors (112)
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.

Quality and Environmental Data

Product Reliability Reports: MAX31725.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

Software
Munich_GUI

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