Thermal Monitor and Fan Speed (RPM) Controller ADM1033 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES 1 local and 1 remote temperature channel ±1.5°C accuracy on local and remote channels Automatic series resistance cancellation on remote Temperature channels > 1 kΩ Fast (up to 64 measurements per second) SMBus 2.0, 1.1, and 1.0 compliant SMBus address input/LOCATION input to UDID Programmable over-/undertemperature limits Programmable fault queue SMBusALERT output Fail-safe overtemperature comparator output Fan speed (RPM) controller Look-up table for temperature-to-fan-speed control Linear and discrete options for look-up table FAN_FAULT output THERM input, used to time PROCHOT assertions REF input, used as reference for THERM (PROCHOT ) 3 V to 5.5 V supply Small 16-lead QSOP package APPLICATIONS Desktop and notebook PCs Embedded systems Telecommunications equipment LCD projectors FUNCTIONAL BLOCK DIAGRAM ALERT Comp ANALOG MULTIPLEXER TACH SMBusALERT THERM SDA SCL GND V CC DRIVE ADM1033 NC LOCATION SMBUS ADDRESS MASK REGISTERS FAULT QUEUE THERM PERCENT TIMER FAULT QUEUE HYSTERESIS REGISTERS OFFSET REGISTERS CONVERSION RATE REGISTER CONFIGURATION REGISTERS BAND GAP REFERENCE BAND GAP TEMPERATURE SENSOR SRC BLOCK FAN SPEED COUNTER TEMPERATURE-TO- FAN-SPEED LOOK-UP TABLE MANUAL FAN SPEED CONTROL REGISTERS FAN RESPONSE TACH SIGNAL CONDITIONING FAN SPEED CONTROLLER ADC LIMIT COMPARATOR VALUE AND LIMIT REGISTERS STATUS REGISTER SERIAL BUS INTERFACE ADDRESS POINTER REGISTER NC NC D– D+ FAN_FAULT REF ALERT THERM 15 8 14 7 16 6 5 12 11 10 9 8 4 2 1 13 3 04937-0-001 NC = NO CONNECT Figure 1.
