EMC1422-1-ACZL-TR SMSC, EMC1422-1-ACZL-TR Datasheet - Page 22

• Manufacturer Part Number: EMC1422-1-ACZL-TR
• Description: Board Mount Temperature Sensors Dual Temp Snsr
• Manufacturer: SMSC

Specifications of EMC1422-1-ACZL-TR

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

Revision 1.36 (07-02-09)
5.11
TEMPERATURE (°C)
Diode Fault
-64
-1
0
0.125
1
Substrate
PNP
The temperature measurement results are stored in the internal and external temperature registers.
These are then compared with the values stored in the high and low limit registers. Both external and
internal temperature measurements are stored in 11-bit format with the eight (8) most significant bits
stored in a high byte register and the three (3) least significant bits stored in the three (3) MSB
positions of the low byte register. All other bits of the low byte register are set to zero.
The EMC1422 has two selectable temperature ranges. The default range is from 0°C to +127°C and
the temperature is represented as binary number able to report a temperature from 0°C to +127.875°C
in 0.125°C steps.
The extended range is an extended temperature range from -64°C to +191°C. The data format is a
binary number offset by 64°C. The extended range is used to measure temperature diodes with a large
known offset (such as AMD processor diodes) where the diode temperature plus the offset would be
equivalent to a temperature higher than +127°C.
Table 5.3
Temperature Measurement Results and Data
I
LOW
Resistance
Correction
shows the default and extended range formats.
Error
Figure 5.6 Block Diagram of Temperature Monitoring Circuit
DEFAULT RANGE 0°C TO 127°C
000 0000 0000
000 0000 0000
000 0000 0000
000 0000 0000
Note 5.1
000 0000 0001
000 0000 1000
Table 5.3 Temperature Data Format
I
HIGH
DN
DP
DATASHEET
Aliasing
Filter
22
Anti-
1°C Temperature Sensor with Hardware Thermal Shutdown
EXTENDED RANGE -64°C TO 191°C
000 0000 0000
000 0000 0000
Note 5.2
001 1111 1000
010 0000 0000
010 0000 0001
010 0000 1000
ADC
ΔΣ
SMSC EMC1422
Datasheet