Thermal Monitor and Fan Speed (RPM) Controller

The ADM1034 is a dual−channel remote− and local−temperature sensor and fan controller. The remote channels monitor the temperature of two remote thermal diodes, which may be discrete 2N3904/6s or may be located on a microprocessor die. The device also monitors its own ambient temperature.

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_FAULT Output

• THERM Input, Used to Time PROCHOT Assertions

• REF Input, Used as Reference for THERM (PROCHOT)

• 3.0 V to 5.5 V Supply

• Small 16−Lead QSOP Package

• This is a Pb−Free Device

APPLICATIONS

• Desktop and Notebook PCs

• Embedded Systems

• Telecommunications Equipment

• LCD Projectors