EMC1002_07 Datasheet, PDF (1/21 Pages) SMSC Corporation – 1°C Dual SMBus Sensor

EMC1002
1°C Dual SMBus Sensor
with Resistance Error
Correction
PRODUCT FEATURES
Datasheet
General Description
The EMC1002 is an SMBus temperature sensor that
monitors up to two temperature zones and can generate
two system interrupts. With ±1°C measurement
accuracy, the EMC1002 provides a low-cost solution for
critical temperature monitoring applications. Extended
features include automatic resistance error correction
and programmable ideality factor configuration
eliminating both major sources of temperature
measurement error.¹ The 11-bit sigma delta
temperature-to-digital converter provides superb
linearity, excellent noise immunity and repeatable
temperature readings.
The EMC1002 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 a second THERM output.
The EMC1002 is pin compatible with the ADT7461,
ADM1032, LM99, and the MAX6649.
1.Patents pending.
Features
„ Resistance Error Correction
„ Ideality Factor Configuration
„ Select 1 of 4 SMBus addresses with external resistor
„ Remote Thermal Zones
— ±1°C Accuracy (40°C to 80°C)
— 0.125°C resolution
„ Internal Thermal Zone
— ±3°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 MSOP lead-free RoHS Compliant
package
Applications
„ Desktop and Notebook Computers
„ Smart batteries
„ Industrial/Automotive
„ Other Electronic Systems
Simplified Block Diagram
Switching
Current
DP
DN
Internal
Temp Diode
SMSC EMC1002
EMC1002
11-bit
delta-sigma
ADC
Remote Temp
Register
Internal Temp
Register
Status Register
Address Pointer Register
Conversion Rate Register
High Limit Registers
Low Limit Registers
THERM Limit Register
THERM Hysteresis Register
Configuration Register
Interrupt Masking
DATASHEET
SMCLK
SMDATA
ALERT
THERM
Revision 1.4 (12-18-07)