ADM1023: System Temperature Sensor, ACPI-Compliant, High Accuracy

The ADM1023 is a 2-channel digital thermometer and under- and overtemperature alarm for use in personal computers and other systems requiring thermal monitoring and management. Optimized for the Pentium® III, the higher accuracy allows systems designers to safely reduce temperature guard banding and increase system performance. The device can measure the temperature of a microprocessor using a diode-connected PNP transistor, which may be provided on-chip with the Pentium III or similar processors; or it can be a low-cost, discrete NPN/PNP device such as the 2N3904/2N3906. A novel measurement technique cancels out the absolute value of the transistor's base emitter voltage so that no calibration is required. The second measurement channel measures the output of an on-chip temperature sensor to monitor the temperature of the device and its environment.

Features
  • On-chip and remote temperature sensing
  • Offset registers for system calibration
  • 1°C accuracy and resolution on local channel
  • 0.125°C resolution/1°C accuracy on remote channel
  • Programmable over/under temperature limits
  • Programmable over/under temperature limits
  • 2-wire SMBus serial interface
  • 200 µA max operating current (0.25 conversions/second)
  • 1 µA standby current
  • 3 V to 5.5 V supply
Applications
  • Thermal Management
End Products
  • Notebook and Desktop Computers
  • Servers
  • Game Consoles
  • RFID Readers
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QSOP-16492-01 (58.5kB)A
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
ACPI-Compliant, High Accuracy Microprocessor System Temperature MonitorADM1023/D (230.0kB)10
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
ADM1023ARQZLast ShipmentsPb-free Halide freeQSOP-16492-011Tube98
ADM1023ARQZ-R7Last ShipmentsPb-free Halide freeQSOP-16492-011Tape and Reel1000
ADM1023ARQZ-REELActivePb-free Halide freeQSOP-16492-011Tape and Reel2500$4.3332
Specifications
ProductSensor TypeData Transmission StandardICC Max (mA)VCC Min (V)VCC Max (V)T Min (°C)T Max (°C)Temperature Error (°C)
ADM1023ARQZ-REELLocal & RemoteSMBus0.235.50120±1
ACPI-Compliant, High Accuracy Microprocessor System Temperature Monitor (230.0kB) ADM1023
QSOP-16 CM2009