MAX31730AUB+

Specialized Overview

The MAX31730AUB+ is a precision temperature sensor featuring one local and three remote sensing channels. It operates within a supply voltage range of 3.0V to 3.6V and supports an operating temperature range from -40°C to +125°C. The device provides 12-bit resolution with 0.0625°C accuracy, achieving ±1°C remote measurement accuracy between 0°C and +100°C. It utilizes a 2-wire SMBus/I2C interface and includes series-resistance cancellation for up to 300Ω. The component is housed in a 10-pin µMAX package.

Specialized Feature Summary

• Features series-resistance cancellation to compensate for high resistance in circuit-board traces and external thermal diodes.
• Includes beta compensation to correct temperature-measurement errors caused by low-beta sensing transistors.
• Provides a highest temperature register to simplify and accelerate overtemperature notification processes.

Specialized Applications

• Monitoring temperatures of multiple external diode-connected transistors alongside internal sensor data.
• Implementing programmable temperature thresholds for system thermal management.
• Integrating with microcontrollers via SMBus or I2C protocols for digital temperature acquisition.

Specialized Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel specifications. Confirm that the intended application environment remains within the specified electrical limits and operating temperature ranges. Ensure compatibility with the required serial bus protocols before finalizing procurement decisions.

Specialized Selection Notes

Select this component when precise multi-channel temperature monitoring is required with integrated resistance and beta compensation. Consider the 10-pin µMAX package constraints for board space. Verify that the host system supports the necessary SMBus/I2C communication standards and can handle the open-drain THERM output configuration effectively.

Specialized Part Context

This part belongs to the Maxim Integrated MAX31730 family of 3-channel remote temperature sensors. It shares core functionalities with other variants in the series but differs in packaging and specific ordering suffixes. The AUB+ designation specifically identifies the 10-pin µMAX package configuration available through authorized distribution channels.

Specialized Replacement Considerations

Consult official Analog Devices documentation for confirmed substitute part numbers. Do not assume functional equivalence with generic temperature sensors without verifying pinout, interface compatibility, and electrical specifications.

Specialized FAQ

How does the device handle high series resistance in remote channels?

The MAX31730 incorporates a series-resistance cancellation feature that compensates for resistance values ranging from 0 to 300Ω in circuit-board traces and external thermal diodes.

What is the function of the ADD pin?

The ADD pin serves as an address-select input. It allows the selection of one of eight possible slave addresses by connecting it to ground or to a grounded resistor.

Can the THERM output be used for interrupts?

Yes, the THERM output can operate in interrupt mode. In this mode, it asserts low when a programmed threshold is crossed and remains asserted until cleared by reading the status register or responding to an Alert Response Address transmission.