EMC1043-3-ACZL-TR SMSC, EMC1043-3-ACZL-TR Datasheet - Page 24

• Manufacturer Part Number: EMC1043-3-ACZL-TR
• Description: Board Mount Temperature Sensors QUAD TEMP SENSOR
• Manufacturer: SMSC

Specifications of EMC1043-3-ACZL-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

APPLICATION NOTE: When measuring a 65nm Intel CPUs, the Ideality Setting should be the default 12h. When
Revision 1.44 (04-14-08)
4.8
29h
2Ah
010001
010010
010011
010100
010101
010110
010111
0
0
0
ADDR
SETTING
2
Diode 1 Beta
Configuration
Diode 2 Beta
Configuration
REGISTER
The Beta Configuration Registers have a factory programmed power-on default based on the beta of
the PNP substrate transistor that is being monitored as the external diode. The default value of the
Diode 2 Beta Configuration Register of EMC1043-5 is 07h (disabled).
The beta compensation circuit is able to compensate for beta variation within a given range. The beta
configuration register is configured to the proper range to match the CPU to be monitored. The beta
values should be set so that the minimum expected beta is not below the threshold indicated in
Table
When using diode-connected transistors (such as the 2N3904) or CPUs that implement the thermal
diode as a two-terminal diode, the Beta Configuration Register should be set to 07h.
Beta Configuration Registers (29h - 2Ah)
Table 4.9 Substrate Diode Ideality Factor Look-Up Table (BJT Model) (continued)
4.11. Beta compensation is activated if the BETA<2:0> bits are set to any value other than 07h.
0
0
1
measuring 45nm Intel CPUs, the Ideality Setting should be 15h.
FACTOR
0.9986
1.0000
1.0013
1.0026
1.0039
1.0053
1.0066
BETA<2:0>
-
-
B7
1
Table 4.11 Beta Configuration Look Up Table
Table 4.10 Beta Configuration Registers
-
-
B6
100001
100010
100011
100100
100101
100110
100111
1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones
SETTING
0
1
0
-
-
DATASHEET
B5
0
-
-
24
B4
FACTOR
1.0200
1.0213
1.0226
1.0239
1.0252
1.0265
1.0278
-
-
B3
0.11
0.18
0.25
BETA<2:0>
BETA<2:0>
B2
110001
SETTING
MINIMUM BETA
B1
B0
SMSC EMC1043
FACTOR
1.0408
(07h for
EMC1043-
5)
DEFAULT
03h
03h
Datasheet