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ADM1023ARQZ 데이터시트(PDF) 1 Page - ON Semiconductor |
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1 / 16 page © Semiconductor Components Industries, LLC, 2010 May, 2010 − Rev. 9 1 Publication Order Number: ADM1023/D ADM1023 ACPI-Compliant, High Accuracy Microprocessor System Temperature Monitor The ADM1023 is a 2−channel digital thermometer and under/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. The ADM1023 communicates over a 2−wire serial interface compatible with SMBus standards. Under/overtemperature limits can be programmed into the device over the serial bus, and an ALERT output signals when the on−chip or remote temperature is out of range. This output can be used as an interrupt or as an SMBus ALERT. FEATURES • Next Generation Upgrade of ADM1021 • 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/Undertemperature Limits • Programmable Conversion Rate • Supports System Management Bus (SMBus) ALERT • 2−Wire SMBus Serial Interface • 200 mA Max Operating Current (0.25 Conversions/Second) • 1 mA Standby Current • 3.0 V to 5.5 V Supply • Small 16−Lead QSOP Package • Pb−Free Packages are Available APPLICATIONS • Desktop Computers • Notebook Computers • Smart Batteries • Industrial Controllers • Telecomm Equipment • Instrumentation http://onsemi.com See detailed ordering and shipping information in the package dimensions section on page 15 of this data sheet. ORDERING INFORMATION xxx = Specific Device Code # = Pb−Free Package YYWW = Date Code XXX = Assembly Lot ID MARKING DIAGRAM 1 QSOP−16 CASE 492 1023A RQZ #YYWW XXX 1 2 3 4 5 6 7 8 ADM1023 TOP VIEW 14 13 12 11 10 9 VDD D+ D– GND ADD1 NC NC ADD0 GND NC ALERT SDATA NC 16 15 NC STBY SCLK |
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