ADT7470

PRODUCTION

Temperature Sensor Hub and Fan Controller

Data Sheet (Rev. E) Product Selection Table
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Overview

  • Monitors and Controls Speed of up to 4 Fans Independently
  • PWM Outputs Drive each Fan under Software Control
  • FULL_SPEED Input Allows Fans to be Blasted 100% by External Hardware
  • Tristate ADDR Pin Allows up to 3 Devices on a Single Bus
  • Monitors up to 10 Remote Temperature Sensors
  • SMBALERT Interrupt Signals Failures to System Controller
  • Temperature Decoder Interprets TMP05 / TMP06 Temperature Sensors and Communicates Values over I2C Bus
  • See datasheet for additional features

The ADT74701 controller is a multichannel temperature sensor and PWM fan controller and fan speed monitor for systems requiring active cooling. It is designed to interface directly to an I2C® bus. The ADT7470 can monitor up to 10 daisy-chained TMP05 temperature sensors. It can also monitor and control the speed of four fans, in automatic or in manual control loops.

A FULL_SPEED input is provided to allow the fans to be blasted to maximum speed, via external hardware control, under extreme thermal conditions or on system startup. An SMBALERT interrupt communicates error conditions such as fan under speed and over temperature measurements to the system service processor. Individual error conditions can then be read from status registers over the I2C bus.

APPLICATIONS

  • Servers
  • Networking and telecommunications equipment
  • Desktops
ADT7470
Temperature Sensor Hub and Fan Controller
ADT7470 Functional Block Diagram ADT7470 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

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Evaluation Kits

EVAL-ADT7470

ADT7470 Evaluation Board

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Features and Benefits

  • On-board and remote temperature sensing
  • On-board and remote fan control
  • No calibration necessary
  • Programmable over/under temperature limits
  • USB serial interface
  • Supports SMBus Alert
  • 3 V to 5.5 V supply
  • 16-lead QSOP

Product Details

The ADT7470 evaluation board is a multi-functional board which includes fan control and monitoring functions in addition to temperature sensing using on board TMP05's. All I/O functionality of the ADT7470 can be exercised without using any external components.


Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).
EVAL-ADT7470
ADT7470 Evaluation Board

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