ADT7470 Temperature Sensor Hub and Fan Controller
The 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.
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
| Security and Surveillance |
Data Sheets
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADT7470ARQZ Production | 16 ld QSOP | OTH 98 | -40 to 125C | 2.51 | 2.18 | Y |
| ADT7470ARQZ-REEL Production | 16 ld QSOP | REEL 2500 | -40 to 125C | 0 | 2.18 | Y |
| ADT7470ARQZ-REEL7 Production | 16 ld QSOP | REEL 1000 | -40 to 125C | 0 | 2.18 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-ADT7470EBZ | Evaluation Board | 99 | Y |
