MAX31855EASA+T

Sensor And Detector Interfaces Overview

The MAX31855EASA+T is a cold-junction compensated thermocouple-to-digital converter designed for K-type thermocouples. It digitizes signals into a signed 14-bit, SPI-compatible, read-only format with 0.25°C resolution. The device supports temperature readings from -270°C to +1800°C and provides ±2°C accuracy for K-type thermocouples between -200°C and +700°C. Operating on a 3.0V to 3.6V supply, it consumes up to 1500µA and functions within an ambient range of -40°C to +125°C in an 8-SOIC package.

Sensor And Detector Interfaces Feature Summary

• Integrated cold-junction compensation eliminates the need for external reference sensors.
• Built-in fault detection identifies open circuits or shorts to VCC and GND.
• Read-only SPI interface simplifies connection to microcontrollers.

Sensor And Detector Interfaces Applications

• Industrial process control
• HVAC systems
• Appliances

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix 'E' confirms K-type thermocouple compatibility, as other letters denote different types. Confirm the '+T' suffix indicates tape-and-reel packaging rather than tube. Ensure the component meets RoHS3 compliance standards required by the target assembly environment.

Sensor And Detector Interfaces Selection Notes

Select this part when using K-type thermocouples requiring integrated signal conditioning. Verify that the system power supply remains within the 3.0V to 3.6V range. Consider thermal management if self-heating affects cold-junction accuracy in enclosed spaces.

Sensor And Detector Interfaces Part Context

This component belongs to the MAX31855 family of high-precision thermocouple interfaces. Variants exist for J, N, T, S, R, and E-type thermocouples, distinguished by their middle letter. The MAX31855 integrates the ADC, cold-junction sensor, and digital controller into a single compact solution.

Sensor And Detector Interfaces Replacement Considerations

MAX31855KASA+T (Tube version)

Sensor And Detector Interfaces FAQ

How does the device handle thermocouple faults?

The MAX31855 detects open circuits and shorts to VCC or GND, setting specific bits in the output data register to indicate the fault condition.

What is the maximum serial clock frequency?

The serial clock frequency (fSCL) can reach up to 5 MHz.