EMC1212-AGZG-TR SMSC, EMC1212-AGZG-TR Datasheet - Page 9

• Manufacturer Part Number: EMC1212-AGZG-TR
• Description: Board Mount Temperature Sensors BBUS CMPLINT DUAL TEMP MNTR/BETA COMP
• Manufacturer: SMSC

Specifications of EMC1212-AGZG-TR

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

BBUS Compliant Dual Temperature Monitor with Beta Compensation
Datasheet
SMSC EMC1212
3.3
1
63
64
65
128
191
191.875
TEMPERATURE (°C)
The external diode supported by the EMC1212 must be connected as shown in
EMC1202 availabe from SMSC will support other diode configurations.
The EMC1212 includes resistance error correction implemented in the analog front end of the chip.
Resistance error correction is an automatic feature that eliminates the need to characterize and
compensate for the series resistance in the external diode lines.
When using a temperature sensor that does not include resistance error correction, voltage developed
across the parasitic resistance in the remote diode path produces an error in the reported temperature.
The error introduced by this resistance is approximately 0.7°C per ohm. Sources of series resistance
are PCB trace resistance, on die (i.e. on the processor) metal resistance, bulk resistance in the base
and emitter of the temperature transistor.
Resistance Error Correction
Table 3.1 EMC1212 Temperature Data Format (continued)
Figure 3.3 External Diode Configuration
i.e. CPU substrate PNP
substrate transistor
110 0000 1000
111 1111 1000
000 0000 0000
000 0000 1000
010 0000 0000
011 1111 1000
011 1111 1111
Typical remote
Local Ground
DATASHEET
BINARY
9
2’S COMPLEMENT FORMAT
DN
DP
to
to
608h
7F8h
000h
008h
200h
3F8h
3FFh
Revision 1.1 (02-07-07)
HEX
Figure
3.3. The