1°C Temperature Sensor with Beta Compensation
Datasheet
Table 5.2 shows the default and extended range formats.
Table 5.2 EMC1402 Temperature Data Format
EXTENDED RANGE RANGE -64°C
TO 191°C
TEMPERATURE (°C)
DEFAULT RANGE 0°C TO 127°C
Diode Fault
-64
000 0000 0000
000 0000 0000
000 0000 0000
000 0000 0000
Note 5.2
-1
000 0000 0000
001 1111 1111
010 0000 0000
0
000 0000 0000
Note 5.1
0.125
1
000 0000 0001
000 0000 1000
010 0000 0000
010 0000 1000
011 1111 1000
011 1111 1111
010 0000 0001
010 0000 1000
100 0000 0000
100 0000 1000
101 1111 1000
101 1111 1111
110 0000 0000
64
65
127
127.875
128
011 1111 1111
Note 5.3
190
011 1111 1111
011 1111 1111
011 1111 1111
111 1111 0000
111 1111 1000
191
>= 191.875
111 1111 1111
Note 5.4
Note 5.1 In default mode, all temperatures < 0°C will be reported as 0°C.
Note 5.2 In the extended range, all temperatures < -64°C will be reported as -64°C.
Note 5.3 For the default range, all temperatures > +127.875°C will be reported as +127.875°C.
Note 5.4 For the extended range, all temperatures > +191.875°C will be reported as +191.875°C.
5.12 External Diode Connections
The EMC1402 can be configured to measure a CPU substrate transistor, a discrete 2N3904 thermal
diode, or an AMD processor diode. The diode can be connected in a variety of ways as indicated in
Figure 5.5.
Revision 1.16 (03-15-07)
SMSC EMC1402
DATA2S2HEET
SMSC [ SMSC CORPORATION ]
