ADT7604

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

Thermal Measurement and Leak Sensing System

数据手册 (Rev. 0) 产品选型表
产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • 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
ADT7604
20-Channel, Data Center Thermal Measurement and Leak Sensing System
ADT7604 Typical Application ADT7604 Typical Temperature Measurement ADT7604 Pin Configuration ADT7604 Chip Illustration
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EVAL-ADT7604-AZ

Data Center Thermal Measurement and Leak Sensing System

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产品详情

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.
EVAL-ADT7604-AZ
Data Center Thermal Measurement and Leak Sensing System
EVAL-ADT7604-AZ Evaluation Board Angle View EVAL-ADT7604-AZ Evaluation Board Top View EVAL-ADT7604-AZ Evaluation Board Bottom View

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