ADM1034

Thermal Monitor and Fan Speed (RPM) Controller ADM1034 FEATURES 1 local and 2 remote temperature channels ±1°C accuracy on local and remote channels Automatic remote temperature channels, up to 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_FAULToutput 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 VCC 6 ADM1034 DRIVE1 1 DRIVE2 3 MANUAL FAN SPEED CONTROL REGISTERS TEMPERATURE-TOFAN-SPEED LOOK-UP TABLE FAN SPEED CONTROLLER FAN RESPONSE SMBUS ADDRESS SERIAL BUS INTERFACE ADDRESS POINTER REGISTER STATUS REGISTER ALERT THERM MASK REGISTERS LIMIT COMPARATOR FAULT QUEUE 16 SCL 15 SDA 8 FAN_FAULT 14 ALERT 7 THERM TACH1 2 TACH2 4 TACH SIGNAL CONDITIONING REF 8 LOCATION 13 D1– 9 D1+ 10 D2– 11 D2+ 12 SRC BLOCK BAND GAP TEMPERATURE SENSOR ANALOG MULTIPLEXER FAN SPEED COUNTER ADC VALUE AND LIMIT REGISTERS FAULT QUEUE HYSTERESIS REGISTERS OFFSET REGISTERS BAND GAP REFERENCE CONVERSION RATE REGISTER CONFIGURATION REGISTERS 5...