ADM1034 Datasheet - ON Semiconductor

ADM1034 Thermal Monitor and Fan Speed (RPM) Controller

DRIVE1 Pin Drives Fan 1. Open-drain output. Requires a pullup resistor. Fan 1 Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan speed. DRIVE2 Pin Drives Fan 2. Open-drain output. Requires a pullup resistor. Fan 2 Fan Speed Measurement Input. Connects to the fan’s TACH.

ADM1034 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 tempe.

ADM1034 Features

* 1 Local and 2 Remote Temperature Channels

* 1C Accuracy on Local and Remote Channels

* Automatic Remote Temperature Channels, Up to 1 kW

* Fast (Up to 64 Measurements per Second)

* SMBus 2.0, 1.1, and 1.0 Compliant

* SMBus Address Input/LOCATION Input to UDID

* Progra

ADM1034-ONSemiconductor.pdf