LTC2984

RECOMMENDED FOR NEW DESIGNS

Multi-Sensor High Accuracy Digital Temperature Measurement System with EEPROM

Data Sheet (Rev. C) Product Selection Table

Part Models: 3
1ku List Price: Starting From $25.22

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Overview

Directly Digitizes 2-, 3-, or 4-Wire RTDs, Thermocouples, Thermistors, and Diodes
On-Chip EEPROM Stores Channel Configuration Data and Custom Coefficients
Single 2.85V to 5.25V Supply
20 Flexible Inputs Allow Interchanging Sensors
Automatic Thermocouple Cold Junction Compensation
Built-In Standard and User-Programmable Coefficients for Thermocouples, RTDs and Thermistors
Measures Negative Thermocouple Voltages
Automatic Burn Out, Short-Circuit and Fault Detection
Buffered Inputs Allow External Protection
Simultaneous 50Hz/60Hz Rejection
Includes 15ppm/°C (Max) Reference (I-Grade)
Demo software with configuration checker and C-code generation tool

The LTC2984 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2984 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold junction temperatures and linearize the results. The device can also measure temperature with standard 2-, 3-, or 4-wire RTDs, thermistors, and diodes. It has 20 reconfigurable analog inputs enabling many sensor connections and configuration options. The LTC2984 includes excitation current sources and fault detection circuitry appropriate for each type of temperature sensor as well as an EEPROM for storing custom coefficients and channel configuration data.

The LTC2984 allows direct interfacing to ground referenced sensors without the need for level shifters, negative supply voltages, or external amplifiers. All signals are buffered and simultaneously digitized with three high accuracy, 24-bit ΔΣ ADC's, driven by an internal 10ppm/°C (maximum) reference.

Applications

Direct Thermocouple Measurements
Direct RTD Measurements
Direct Thermistor Measurements
Custom Sensor Applications

Part Models: 3
1ku List Price: Starting From $25.22

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2984CLX#PBF	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2984HLX#PBF	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2984ILX#PBF	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2021 - 21_0046 Transfer of LQFP and LQFP_EP from AEM to AET
		PCN21_0046_Form Material_Report Qualification Results Summary Other
LTC2984CLX#PBF	PRODUCTION
LTC2984HLX#PBF	PRODUCTION
LTC2984ILX#PBF	PRODUCTION
Nov 13, 2019 - 19_0267 LTC2983,LTC2984,LTC2986 and LTC2986-1 die revision change.
		PCN19_0267_Form Material_Report Qualification Results Summary
LTC2984CLX#PBF	PRODUCTION
LTC2984HLX#PBF	PRODUCTION
LTC2984ILX#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 2

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LTC2983	RECOMMENDED FOR NEW DESIGNS	Multi-Sensor High Accuracy Digital Temperature Measurement System
LTC2986	RECOMMENDED FOR NEW DESIGNS	Multi-Sensor High Accuracy Digital Temperature Measurement System with EEPROM

Tools & Simulations

Linduino 7

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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Evaluation Kits

LTC2984 Demo Board | LTC2984 Motherboard (DC2399) + 20-Input Breakout Board (DC2210), requires DC2026

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Product Details

The DC2420 is the starter kit for demonstrating the performance and ease of use of the LTC2984, which is a complete temperature measurement system on a chip. This kit includes the DC2399 (main demo circuit containing the LTC2984) and the DC2210 (a simple experiment circuit allowing bread boarding). In addition to the starter demonstration kit, sensor specific demonstration boards highlighting the performance of RTDs, thermistors, or thermocouples are also available.