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.

FEATURES

1 local and 1 remote temperature channel

±1.5°C accuracy on local and remote channels

Automatic series resistance cancellation on remote

Temperature channels > 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 V to 5.5 V supply

Small 16-lead QSOP package

APPLICATIONS

Desktop and notebook PCs

Embedded systems

Telecommunications equipment

LCD projectors