The LM63 is a remote diode temperature sensor with integrated fan control. The LM63 accurately measures: (1) its own temperature and (2) the temperature of a diode-connected transistor, such as a 2N3904, or a thermal diode commonly found on Computer Processors, Graphics Processor Units (GPU) and other ASIC's. The LM63 remote temperature sensor's accuracy is factory trimmed for the series resistance and 1.0021 non-ideality of the Intel 0.13 µm Pentium 4 and Mobile Pentium 4 Processor-M thermal diode. The LM63 has an offset register to correct for errors caused by different non-ideality factors of other thermal diodes.
The LM63 also features an integrated, pulse-width-modulated (PWM), open-drain fan control output. Fan speed is a combination of the remote temperature reading, the lookup table and the register settings. The 8-step Lookup Table enables the user to program a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise.
Intel is a trademark of Texas Instruments. Pentium is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
|Part number||Order||Device type||Interface||Local sensor accuracy (Max) (+/- C)||Temp resolution (Max) (bits)||Operating temperature range (C)||Supply voltage (Min) (V)||Supply voltage (Max) (V)||Supply current (Max) (uA)||Features||Remote channels (#)||Addresses||Rating||Package Group||Package size: mm2:W x L (PKG)|
||Fan Controller||SMBus||3||8||0 to 125||3||3.6||2000||1 PWM output with an 8-step lookup table, 1 tachometer input, ALERT, TCRIT||1||1||Catalog||SOIC | 8||8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)|
||Fan Controller||I2C, SMBus, 2-Wire||3||11||-40 to 125||3||3.6||825||
1 tachometer input
remote diode beta compensation
|1||1||Catalog||WSON | 10||10WSON: 9 mm2: 3 x 3 (WSON | 10)|