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PDF EMC1033 Data sheet ( Hoja de datos )
| Número de pieza | EMC1033 | |
| Descripción | Triple SMBus Sensor | |
| Fabricantes | SMSC | |
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EMC1033
1°C Triple SMBus
Sensor with Resistance
Error Correction
PRODUCT FEATURES
Datasheet
General Description
The EMC1033 is an SMBus temperature sensor that
monitors up to three temperature zones and can
generate two system interrupts. With ±1°C measurement
accuracy, the EMC1033 provides a low-cost solution for
critical temperature monitoring applications. Features
include automatic resistance error correction and
programmable ideality factor configuration eliminating
both major sources of temperature measurement error.1
The EMC1033 generates two separate interrupts with
programmable thermal trip points. The THERM output
operates as a thermostat with programmable threshold
and hysteresis. The ALERT output can be configured
as a maskable SMBus alert with programmable
window comparator limits, or as a second THERM
output. Both interrupts are maintained in an 8-pin
package while a third temperature zone is added with
the anti-parallel diode technique. This allows the
EMC1033 to be pin compatible with the ADT7461,
ADM1032, LM99, and the MAX6649 with the advantage
of a third temperature zone.
1.Patents pending.
Features
Resistance Error Correction
Ideality Factor Configuration
Select 1 of 4 SMBus addresses with external resistor
Remote Thermal Zones
— ±1.0°C Accuracy (40°C to 80°C)
— 0.125°C resolution
Internal Thermal Zone
— ±3.0°C Accuracy (0°C to 85°C)
Maskable Interrupt using ALERT
One-shot Command during standby
Programmable temperature conversion rate
Extended temperature (-64°C to 191°C) available
Over-limit filtering with consecutive counter
Small 8-pin TSSOP lead-free RoHS compliant
package
Applications
Desktop and Notebook Computers
Thermostats
Smart batteries
Industrial/Automotive
Simplified Block Diagram
EMC1033
DP1
DN2
DN1
DP2
Switching
Current
Internal
Temp Diode
11-bit
delta-sigma
ADC
Remote Temp
Register 1
Remote Temp
Register 2
Internal Temp
Register
Status Register
Address Pointer Register
Conversion Rate Register
High Limit Registers
Low Limit Registers
THERM Limit Register
THERM Hysterisis Register
Configuration Register
Interrupt Masking
SMCLK
SMDATA
ALERT
THERM
SMSC EMC1033
DATASHEET
Revision 1.2 (12-18-07)
1 page  
1°C Triple SMBus Sensor with Resistance Error Correction
Datasheet
Chapter 2 Electrical Characteristics
Table 2.1 Electrical Characteristics
VDD=3.0V to 3.6V, TA= -40°C to +125°C, Typical values at TA = 27°C unless otherwise noted
PARAMETER
SYMBOL MIN TYP MAX UNITS
CONDITIONS
DC Power
Supply Voltage
Average Operating Current
VDD
IDD
Internal Temperature Monitor
IPD
Temperature Accuracy
Temperature Resolution
External Temperature Monitor
Temperature Accuracy
Remote Diode 40°C to 80°C
Remote Diode 0°C to 125°C
Temperature Resolution
Voltage Tolerance
Voltage at pin (ADDR/THERM, )
Voltage at pin (ALERT/THERM2,
SMDATA,SMCLK)
VTOL
VTOL
Digital Outputs (ADDR/THERM, ALERT/THERM2)
Output Low Voltage
High Level Leakage Current
SMBus Interface (SMDATA,SMCLK)
VOL
IOH
Input High Level
Input Low Level
Input High/Low Current
Hysteresis
VIH
VIL
IIH/IIL
Input Capacitance
Output Low Sink Current
SMBus Timing
Clock Frequency
Spike Suppression
FSMB
3.0 3.3 3.6
V
47 TBD
μA 0.0625 conversions/s
See Table 4.7,
“Conversion Rates,”
on page 17
4.8 10
μA Standby mode
±1 ±3
0.5
°C 0°C≤TA≤80°C
°C
0.125
±1
±3
°C 15°C≤TA≤70°C
°C -40°C≤TA≤125°C
°C
-0.3 3.6 V
-0.3 5.5 V
0.4
0.1 1
V IOUT=-4mA
μA VOUT=VDD
2.0
0.8
-1 1
500
5
6
V
V
μA
mV
pF
mA SMDATA = 0.6V
10 400 kHz
50 ns
SMSC EMC1033
5
DATASHEET
Revision 1.2 (12-18-07)
5 Page 
1°C Triple SMBus Sensor with Resistance Error Correction
Datasheet
this correction is only perfect at one temperature since the error introduced by ideality factor mismatch
is a function of temperature. The higher the temperature measured, the greater the error introduced.
To provide maximum flexibility to the user, the EMC1033 provides a 6-bit ideality factor register for
each remote diode. The ideality factor of the remote diode is programmed in these registers to
eliminate errors across all temperatures. See section Section 4.18, "Ideality Factor Register," on
page 19 for details on programming these registers.
4.4
Temperature Measurement Results and Data
The 11-bit temperature measurement results are stored in temperature value registers. The EMC1033
has two temperature ranges and the default range is from 0 to 127°C. This range uses binary number
format, and the most significant bit is not used. The extended range is from –64°C to +191°C and is
binary offset by 64°C. Table 4.1 shows the two temperature data formats with an LSB equivalent to
0.125°C. The format is selected as described in Section 4.11, "Configuration Register," on page 16
Table 4.1 Temperature Data Format
ACTUAL TEMP.
(°C)
-63
DEFAULT RANGE
BINARY
0000 0000 000 Note 4.1
EXTENDED RANGE
OFFSET BINARY
0000 0001 000 Note 4.2
-0.125
0
+0.125
+0.250
0000 0000 000 Note 4.1
0000 0000 000 Note 4.1
0000 0000 001
0000 0000 010
0011 1111 111
0100 0000 000
0100 0000 001
0100 0000 010
+1 0000 0001 000
0100 0001 000
+127
+128
0111 1111 000 Note 4.3
0111 1111 000 Note 4.3
1011 1110 000
1011 1111 000
+190
+191
0111 1111 000 Note 4.3
0111 1111 000 Note 4.3
1111 1110 000
1111 1111 000 Note 4.4
Note 4.1 Data in Binary Format reads 0000 0000 000 for all temperatures ≤ 0.00°C
Note 4.2 Data in Offset Binary Format reads 0000 0000 000 for all temperatures ≤ -64°C
Note 4.3 Data in Binary Format reads 0111 1111 000 for all temperatures ≥ +127°C
Note 4.4 Data in Offset Binary Format reads 1111 1111 000 for all temperatures ≥ +191°C
The 11-bit temperature data is stored with the 8 most significant bits stored in the High Byte register
and the 3 least significant bits in the Low Byte register. The Low Byte register contains the three least
significant bits as outlined in Table 4.2. These bits are stored in the upper three bits of the register,
and the five LSB positions of this register always read zero. In Table 4.2, the upper case “B” shows
the bit position of a 16-bit word created by concatenating the High Byte and Low Byte, and the lower
case “b” shows the bit position in the 11-bit temperature data. The resolution of the internal temperature
is 0.5°C and the b1 and b0 bits of the Internal Temperature Value Low Byte register will always read 0.
SMSC EMC1033
11
DATASHEET
Revision 1.2 (12-18-07)
11 Page | ||
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