LTC2986HLX-1#PBF

Thermal Management Overview

The LTC2986HLX-1#PBF is a multi-sensor high accuracy digital temperature measurement system with EEPROM, manufactured by Analog Devices Inc. It features a 48-lead LQFP package and operates on a single supply voltage ranging from 2.85V to 5.25V. The device provides 0.1°C accuracy and 0.001°C resolution across ten flexible analog input channels. It supports direct digitization of standard thermocouples (Types B, E, J, K, N, S, R, T), RTDs, thermistors, and diodes. The integrated SPI interface facilitates communication, while the onboard EEPROM stores channel configuration data and custom coefficients.

Thermal Management Feature Summary

• Directly digitizes various sensor types including thermocouples, RTDs, thermistors, and diodes without external linearization circuitry
• Includes on-chip EEPROM for storing channel configuration data and user-defined coefficients
• Performs automatic cold junction compensation using internal sensors or external connected devices
• Features built-in fault detection for burn-out, short-circuit conditions, and simultaneous 50Hz/60Hz noise rejection

Thermal Management Applications

• Universal multi-sensor temperature measurement systems requiring high accuracy
• Industrial process control applications utilizing diverse sensor arrays
• Automotive thermal management systems certified under AEC-Q100 standards
• Medical equipment requiring precise temperature monitoring and diagnostics

Thermal Management Procurement Notes

Verify the specific H-grade operating temperature range (-40°C to 125°C) against application requirements. Confirm that the -1 suffix indicates the inclusion of non-volatile EEPROM storage for persistent configuration. Ensure the LQFP-48 package dimensions align with PCB layout constraints. Validate power supply stability within the 2.85V to 5.25V specification during operation.

Thermal Management Selection Notes

Select this component when designing systems that require mixed sensor inputs such as thermocouples and RTDs simultaneously. The H-grade variant is suitable for environments with elevated temperatures up to 125°C. Consider the -1 version if permanent storage of calibration data or custom sensor tables is necessary. Evaluate the 10-channel capacity against the total number of measurement points required in the design.

Thermal Management Part Context

This part belongs to the LTC2986 family, which includes software and pin-compatible versions like the LTC2983 and LTC2984 offering higher channel counts. The HLX-1 designation specifies the high-temperature grade, LQFP packaging, and EEPROM integration. It serves as a comprehensive solution for replacing discrete signal conditioning and ADC circuits in complex temperature monitoring architectures.

Thermal Management Replacement Considerations

LTC2986ILX-1#PBF

Thermal Management FAQ

How does the device handle thermocouple cold junction compensation?

The LTC2986 automatically measures the cold junction temperature using an internal diode or an externally connected sensor such as an RTD, thermistor, or active analog sensor, then applies the necessary correction algorithms.

What is the function of the Q1, Q2, and Q3 pins?

These pins are external bypass connections for the integrated charge pump. They must be connected to capacitors to support the internal circuitry that allows measurement of negative thermocouple voltages relative to ground.