ADT7604

RECOMMENDED FOR NEW DESIGNS

20-Channel, Data Center Thermal Measurement and Leak Sensing System

Thermal Measurement and Leak Sensing System

Data Sheet (Rev. 0) Product Selection Table

Part Models: 6
1ku List Price: Starting From $19.56

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Overview

Directly Digitizes:
- Copper Trace Temperature Sensors
- Liquid Leakage Sensing
- 2-, 3-, or 4-Wire RTDs
- Thermistors
Zero-Config Startup through On-Chip EEPROM
Single 2.85V to 5.25V Supply
No Negative Supply Required

20 Single-Ended/10 Differential Inputs Allow
Interchanging Sensors
Built-in Standard and User-Programmable
Coefficients for RTDs and Thermistors
Automatic Open-Circuit, Short-Circuit, and Fault Detection
Buffered Inputs Allow External Filtering
Simultaneous 50Hz/60Hz Rejection

The ADT7604 measures a wide variety of temperature sensors and digitally outputs the result, in °C, °F, or Ω, with 0.1°C accuracy and 0.001°C resolution. The device measures temperature with standard 2-, 3-, or 4-wire RTDs and thermistors. It has 20 reconfigurable analog inputs enabling many sensor connections and configuration options. The ADT7604 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 ADT7604 features accurate temperature measurement with copper trace sensors, which are thin copper traces integrated into PCBs or laminate substrates, and can be placed in mechanically hard-to-reach places to sense thermal hotspots. The ADT7604 also accurately measures resistive leak sensors for safety monitoring in liquid-handling systems.

The ADT7604 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 two high-accuracy, 24-bit Δ-Σ ADCs.

APPLICATIONS

AI/HPC Data Center Liquid Cooling Systems
Server Rack Thermal Management
Industrial Process Control and Monitoring
CDU and Coolant Distribution Unit Monitoring

Part Models: 6
1ku List Price: Starting From $19.56

Documentation

Data Sheet 1

ADT7604: 20-Channel, Data Center Thermal Measurement and Leak Sensing System Data Sheet (Rev.0) 05/26/2026

User Guide 1

EVAL-ADT7604-AZ User Guide: Data Center Thermal Measurement and Leak Sensing System (Rev.0) 05/26/2026

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
ADT7604ASTZ	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
ADT7604ASTZ-RL	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
ADT7604BSTZ	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
ADT7604BSTZ-RL	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
ADT7604CSTZ	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
ADT7604CSTZ-RL	48-Lead LQFP (7mm x 7mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Evaluation Kits

Data Center Thermal Measurement and Leak Sensing System

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Product Details

The EVAL-ADT7604-AZ features the ADT7604 20-channel, data center thermal measurement and leak sensing system with EEPROM. The ADT7604 measures a wide variety of temperature sensors and digitally outputs the result in °C, °F, or Ω with 0.1°C accuracy and 0.001°C resolution. All signals are buffered and simultaneously digitized with two high-accuracy, 24-bit Δ-Σ ADCs.

The ADT7604 features accurate temperature measurement with copper trace sensors, which are thin copper traces integrated into PCBs or laminate substrates, and can be placed in mechanically hard-to-reach places to sense thermal hotspots. The ADT7604 also accurately measures resistive leak detectors for safety monitoring in liquid-handling systems.

The EVAL-ADT7604-AZ is a thermal measurement evaluation board with two copper trace sensors, two leak detectors, a 1kΩ thermistor and a PT-100 RTD. When connected to a DC2026C Linduino demo circuit and a host PC, the EVAL-ADT7604-AZ reports temperature, resistance, and fault status from multiple types of sensors through the graphical user interface (GUI).

The copper trace sensors require a one-time calibration prior to operation. The leak detection sensors can be configured to report either raw resistance between the metal traces or the percentage of sensor coverage. See the Calibration sections for detailed setup procedures.

The GUI supports the evaluation of all onboard sensors as well as external custom sensors: a custom copper trace sensor connected to J1 and a custom leak detection sensor connected to J3.

The ADT7604 is available in a 48-lead plastic LQFP package. The ADT7604 data sheet gives a complete description of this part, its operation, and applications information. The ADT7604 data sheet must be read in conjunction with this user guide to properly use the evaluation circuit EVAL-ADT7604-AZ.