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LM85

Part Number	LM85
Manufacturer	National Semiconductor
Description	Hardware Monitor
Published	Apr 25, 2005
Detailed Description	LM85 Hardware Monitor with Integrated Fan Control March 2003 LM85 Hardware Monitor with Integrated Fan Control General...
Datasheet	LM85 PDF File

Overview

LM85 Hardware Monitor with Integrated Fan Control March 2003 LM85 Hardware Monitor with Integrated Fan Control General Description The LM85, hardware monitor, has a two wire digital interface compatible with SMBus 2.
0.
Using an 8-bit Σ∆ ADC, the LM85 measures: – the temperature of two remote diode connected transistors as well as its own die – the VCCP, 2.
5V, 3.
3VSBY, 5.
0V, and 12V supplies (internal scaling resistors).
To set fan speed, the LM85 has three PWM outputs that are each controlled by one of three temperature zones.
The LM85 includes a digital filter that can be invoked to smooth temperature readings for better control of fan speed.
The LM85 has four tachometer inputs to measure...

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