MAX31889

±0.25°C Accurate I2C Temperature Sensor

High-Precision I2C Temperature Sensor on a Battery Power Budget


Please check latest availability status for a specific part variant.

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.

MAX31889: Simplified Block Diagram MAX31889: Simplified Block Diagram Enlarge+

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

See parametric specs for Temperature Sensors (113)


Part NumberSensor TypeFunctionsInterfaceAccuracy
(±°C)
Parasite Pwr.Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX31889 NEW!LocalHigh Precision Temperature SensorI2C0.25NoYes-40 to +125
UDFN/6
$1.65 @1k

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.

MAX31889EVSYS: Evaluation System for the MAX31889
Request Reliability Report for: MAX31889 
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.

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