ADM1033ARQ-REEL7 Просмотр технического описания (PDF) - Analog Devices

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ADM1033ARQ-REEL7

Thermal Monitor and Fan Speed (RPM) Controller

Analog Devices 

GENERAL DESCRIPTION

The ADM1033 is a remote and local temperature sensor and fan

controller. Its remote channel accurately monitors the

temperature of a remote thermal diode, which can be a discrete

2N3904/6 or located on a microprocessor die. The device can

monitor its own ambient temperature as well.

The ADM1033 is also used to monitor and control the speed

of a cooling fan. The user can program a target fan speed, or use

the look-up table to input a temperature-to-fan speed profile.

The look-up table can be configured to run the fan at discrete

ADM1033

speeds (discrete mode) or to ramp the fan speed with tempera-

ture (linear mode).

The ADM1033 communicates over a 2-wire SMBus 2.0 inter-

face. An 8-level LOCATION input allows the user to choose

between SMBus 1.1 and SMBus 2.0.

The ALERT output indicates error conditions. In addition, the

THERM I/O signals overtemperature as an output and times

THERM assertions as an input. Pin 8 can be configured as a

reference input for the THERM (PROCHOT) input.

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