ADM1034 datasheet(3/40 Pages) AD

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ADM1034

Rev. 0 | Page 3 of 40

GENERAL DESCRIPTION

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 communicates 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 over-

temperature as an output and times THERM assertions as

an input. Pin 8 can be configured as a reference for the

THERM (PROCHOT) input.

ADM1034 Datasheet(PDF) 3 Page - Analog Devices