General Description
The EMC1187 is a high accuracy, low cost, 1.8V System Management Bus (SMBus) compatible temperature sensor. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 65nm and lower geometry processors) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications. The ability to communicate at 1.8V SMBus levels provides compatible I/O for the advanced processors found in today’s tablet and smartphone applications.

FEATUREs
◾ Hardware Thermal Shutdown
   — triggers dedicated SYS_SHDN pin
   — hardware configured range 77°C to 112°C in 1°C steps
   — cannot be disabled or modified by software
◾ Support for diodes requiring the BJT/transistor model
   — Supports 65nm and lower geometry CPU thermal
      diodes
◾ Pin and register compatible with EMC1423
◾ Automatically determines external diode type and
   optimal settings
◾ Resistance Error Correction
◾ Frequency hops the remote sample frequency to reject
   DC converter and other coherent noise sources*
◾ Consecutive Alert queue to further reduce false Alerts
◾ Up to 2 External Temperature Monitor
   — 25°C typ, ±1°C max accuracy (20°C < TDIODE < 110°C)
   — 0.125°C resolution
   — Supports up to 2.2nF diode filter capacitor
◾ Internal Temperature Monitor
   — ±1°C accuracy
   — 0.125°C resolution
◾ 3.3V Supply Voltage
◾ 1.8V SMBus operation
◾ Programmable temperature limits for ALERT (85°C
   default high limit and 0°C default low limit)
◾ Available in small 10-pin 3mm x 3mm DFN RoHS
   compliant package

APPLICATIONs
◾ Notebook Computers
◾ Desktop Computers
◾ Industrial
◾ Embedded applications