ADM1034 Datasheet | onsemi

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. The ADM1034 can monitor and control the speed of two cooling fans. The user can program a target fan speed, or else use the look-up table to input a temperature-to-fan speed profile. The look-up table can be configured to run the fans at discrete speeds (discrete mode) or to ramp the fan speed with temperature (linear mode). The ADM1034 municates over a 2-wire SMBus 2.0 interface. An 8-level LOCATION input allows the user to choose between SMBus 1.1 and SMBus 2.0. An ALERT output indicates error conditions. The THERM I/O signals overtemperature as an output and times THERM assertions as an input. Pin 8 can be configured as a reference for the THERM (PROCHOT) input. Features - 1 Local and 2 Remote Temperature Channels - 1C Accuracy on Local and Remote Channels - Automatic Remote Temperature Channels, Up to 1 k W - Fast (Up to 64 Measurements per Second) - SMBus 2.0, 1.1, and 1.0 pliant - SMBus Address Input/LOCATION Input to UDID - Programmable Over/Undertemperature Limits - Programmable Fault Queue - SMBus ALERT Output - Fail-Safe Overtemperature parator 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 - Telemunications Equipment - LCD...