Features and Benefits
- Monitors up to 10 Remote Temperature Sensors
- 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
- SMBALERT Interrupt Signals Failures to System Controller
- Tristate ADDR Pin Allows up to 3 Devices on a Single Bus
- Temperature Decoder Interprets TMP05/TMP06 Temperature Sensors and Communicates Values over I2C Bus
- Limit Comparison of All Monitored Values
Product DetailsThe ADT7470 controller is a multichannel temperature sensor and PWM fan controller and fan speed monitor for noise sensitive systems requiring active system cooling. It is designed to interface directly to an I2C bus and control/monitor the fans using a service processor. The aim is to quickly develop systems that are modular and can easily be expanded depending on the system’s cooling requirements. The device can monitor up to ten temperature sensors. It can also monitor and control the speed of four fans so that they operate at the lowest possible speed for minimum acoustic noise. A FULL_SPEED input is provided to allow the fans to be “blasted” to 100% via external hardware control, under extreme thermal conditions or on system startup. An SMBALERTinterrupt communicates error conditions such as fan underspeed, fan failure to the system service processor. Individual error conditions can then be read from status registers over the I2C bus. In the event of a fan failure condition, any or all PWM outputs can be programmed to automatically adjust to 100% to provide failsafe cooling.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
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).
Features & 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
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.
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.