ADT7490: Remote Thermal Monitor and Fan Controller with PECI Interface

The ADT7490 is a thermal monitor and multiple PWM fan controller for noise-sensitive or power-sensitive applications requiring active system cooling. The ADT7490 includes a local temperature sensor, two remote temperature sensors including series resistance cancellation, and monitors CPU temperature with a PECI interface. The ADT7490 can drive a fan using either a low or high frequency drive signal, and measure and control the speed of up to four fans so they operate at the lowest possible speed for minimum acoustic noise.

Features
  • 1 local on-chip temperature sensor
  • 2 remote temperature sensors
  • 3-current external temperature sensors with series resistance cancellation (SRC)
  • PECI interface for CPU thermal information and support of up to 4 PECI inputs on one pin
  • 3 high frequency or low frequency PWM outputs for use with 3-wire or 4-wire fans
  • 4 TACH inputs to measure fan speed
  • OS independent automatic fan speed control based on thermal information
  • Dynamic TMIN control mode to optimize system acoustics
  • Default startup at 100% PWM for all fans for robust operation
Applications
  • Thermal Management
End Products
  • Notebook and Desktop Computers
  • Servers
  • Game Consoles
  • RFID Reader
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Remote Thermal Monitor and Fan Controller with PECI InterfaceADT7490/D (758kB)6Jan, 2016
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QSOP24 NB492B-01 (63.4kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
ADT7490ARQZLast ShipmentsPb-free Halide freeQSOP-24492B-013Tube56
ADT7490ARQZ-R7Last ShipmentsPb-free Halide freeQSOP-24492B-013Tape and Reel1000
ADT7490ARQZ-REELActivePb-free Halide freeQSOP-24492B-013Tape and Reel2500$0.85
Specifications
ProductData Transmission StandardICC Max (mA)VCC Min (V)VCC Max (V)T Min (°C)T Max (°C)
ADT7490ARQZ-REELSMBus533.6-40125
Remote Thermal Monitor and Fan Controller with PECI Interface (758kB) ADT7490
QSOP24 NB PACVGA200