TEMP SENSOR

The EMC1438 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to CPU diodes requiring the BJT or transistor model) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications. Additionally, the hardware controlled STANDBY pin allows for system level power shutdown to support energy saving initiatives. The EMC1438 monitors up to eight temperature channels (up to seven external and one internal). The device provides ±1°C accuracy for the internal and external diode temperatures. Temperature monitoring includes two tiers of protection: one that can be masked and causes the ALERT pin to be asserted, and the other that cannot be masked and causes the THERM pin to be asserted. Hardware Set Standby Mode 200uA (typical) quiescent current in Standby Designed to support 45nm, 65nm, and 90nm CPU diodes Supports diodes requiring the BJT or transistor model Resistance Error Correction (up to 100 Ohms) Up to seven External Temperature Monitors ±1°C Accuracy (40°C < TDIODE < 110°C) 0.125°C Resolution Supports up to 2.2nF filter capacitor Anti-parallel diodes for extra diode support and compact design Internal Temperature Monitor ±1°C Accuracy 0.125°C Resolution Programmable temperature limits for ALERT and THERM 3.3V Supply Voltage SMBus 2.0 interface Pin-selectable SMBus address Block Read and Write Available in a 16-pin 4mm x 4mm QFN Lead free RoHS Compliant package