EMC1063-1-ACZL-TR(2007) Ver la hoja de datos (PDF) - SMSC -> Microchip

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EMC1063-1-ACZL-TR
(Rev.:2007)

1°C Triple Temperature Sensor with Hotter of Two Zones

SMSC -> Microchip 

1°C Triple Temperature Sensor with Hotter of Two Zones

Datasheet

The External Diode 1 channel has the REC functionality disabled for use in monitoring an AMD K8

processor. The External Diode 2 channel defaults to REC functionality disabled but can be enabled by

writing to the Configuration 2 Register (see Section 4.5). If the External Diode 2 channel is connected

as a diode-connected transistor as shown in Figure 3.3, resistance error correction should be enabled

to minimize series resistance and improve accuracy

3.7

Programmable Ideality Factor

The EMC1063 default is for a diode ideality factor of 1.008 which is common for a 2N3904 diode and

for many processor transistors. When a diode or transistor is used that has a different ideality factor

value than 1.008 a temperature error is induced that is a linear function of temperature. Previous

solutions for this mismatch in ideality factor has been to supply a programmable offset to the

temperature reading which corrects the error at a single temperature but causes a residual error at all

other temperatures. The EMC1063 ideality factor register corrects this mismatch error at all

temperatures (see Section 4.7).

APPLICATION NOTE: When monitoring a substrate transistor or CPU diode and beta compensation is enabled, the

Ideality Factor should not be adjusted. Beta Compensation automatically corrects for most

ideality errors.

3.8

Diode Faults

The EMC1063 detects a fault if the DP pin is left floating or is shorted to VDD. In the case of a diode

fault, the corresponding status bit will be set and the output data will be set at 400h.

SMSC EMC1063

15

DATASHEET

Revision 1.37 (02-05-07)

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