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±0.25°C Accurate I2C Temperature Sensor

High-Precision I2C Temperature Sensor on a Battery Power Budget

Product Details

The MAX31889 operates from a 1.7V to 3.6V supply voltage, and is a low-power, high-accuracy digital temperature sensor with ±0.25°C accuracy from -20°C to +105°C and ± 0.65°C accuracy from -40°C to +125°C. The MAX31889 has 16-bit resolution (0.005°C).

The device uses a standard I2C serial interface to communicate with a host controller. Two GPIO pins are available. GPIO1 can be configured to trigger a temperature converison, while GPIO0 can be configured to generate an interrupt for selectable status bits.

The MAX31889 includes a 32-word FIFO for the temperature data and also includes high and low threshold digital temperature alarms. The device is available in a 2mm x 2mm x 0.8mm, 6-pin, µDFN package.

Key Features

  • High Accuracy
    • ±0.25°C Accuracy from -20°C to +105°C
    • ±0.65°C Accuracy from -40°C to +125°C 
  • Long Battery Life
    • 1.7V to 3.6V Operating Voltage
    • 68µA Operating Current During Measurement
    • 0.55µA Standby Current
  • Small Size
    • 2mm x 2mm x 0.8mm, 6-Pin µDFN
  • Safety and Compliance
    • High and Low Temperature Alarms
  • I2C Digital Interface
    • Configurable Convert Temperature Input Pin
    • Configurable Interrupt Output Pin
    • 32-Word FIFO for Temperature Data
    • 4 I2C Addresses Available—More Addresses Available by Request
    • Unique ROM IDs Allow Device to Be NIST Traceable

Applications/Uses

  • Internet of Things (IoT) Sensors
  • Precision Temperature Monitoring
  • RTD Replacement
Parametric specs for Temperature Sensors
Sensor Type Local
Interface I2C
Functions High Precision Temperature Sensor
Accuracy (±°C) 0.25
Parasite Pwr. No
Oper. Temp. (°C) -40 to +125
Package/Pins UDFN/6
Budgetary
Price (See Notes)
$1.65 @1k
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Simplified Block Diagram

MAX31889: Simplified Block Diagram MAX31889: Simplified Block Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX31889 evaluation system (EV system) provides a single platform to evaluate the MAX31889, a temperature sensor with ±0.3°C accuracy. The EV system consists of two boards connected through headers, a MAX32630FTHR microcontroller board, and the MAX31889 EV kit board. The MAX32630FTHR contains the firmware necessary to use the PC GUI program and also provides power to the MAX31889 EV kit board. The MAX31889 EV kit board ships with jumpers preinstalled to allow quick evaluation of the MAX31889.

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Features

  • Easy to Reach Test Points
  • Fully Assembled and Tested
  • Windows® 7, 8, and 10-Compatible Software

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Support & Training

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
Interface I2C
Functions High Precision Temperature Sensor
Accuracy (±°C) 0.25
Parasite Pwr. No
Oper. Temp. (°C) -40 to +125
Package/Pins UDFN/6
Budgetary
Price (See Notes)
$1.65 @1k

Key Features

  • High Accuracy
    • ±0.25°C Accuracy from -20°C to +105°C
    • ±0.65°C Accuracy from -40°C to +125°C 
  • Long Battery Life
    • 1.7V to 3.6V Operating Voltage
    • 68µA Operating Current During Measurement
    • 0.55µA Standby Current
  • Small Size
    • 2mm x 2mm x 0.8mm, 6-Pin µDFN
  • Safety and Compliance
    • High and Low Temperature Alarms
  • I2C Digital Interface
    • Configurable Convert Temperature Input Pin
    • Configurable Interrupt Output Pin
    • 32-Word FIFO for Temperature Data
    • 4 I2C Addresses Available—More Addresses Available by Request
    • Unique ROM IDs Allow Device to Be NIST Traceable

Applications/Uses

  • Internet of Things (IoT) Sensors
  • Precision Temperature Monitoring
  • RTD Replacement

Description

The MAX31889 operates from a 1.7V to 3.6V supply voltage, and is a low-power, high-accuracy digital temperature sensor with ±0.25°C accuracy from -20°C to +105°C and ± 0.65°C accuracy from -40°C to +125°C. The MAX31889 has 16-bit resolution (0.005°C).

The device uses a standard I2C serial interface to communicate with a host controller. Two GPIO pins are available. GPIO1 can be configured to trigger a temperature converison, while GPIO0 can be configured to generate an interrupt for selectable status bits.

The MAX31889 includes a 32-word FIFO for the temperature data and also includes high and low threshold digital temperature alarms. The device is available in a 2mm x 2mm x 0.8mm, 6-pin, µDFN package.

Simplified Block Diagram

MAX31889: Simplified Block Diagram MAX31889: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal