EMC1212

EMC1212 BBUS Compliant Dual Temperature Monitor with Beta Compensation PRODUCT FEATURES GENERAL DESCRIPTION The EMC1212 is a temperature sensor that communicates with a host over a single-wire SMSC BudgetBus™ Sensor Interface. The EMC1212 monitors one internal diode and one remote temperature zone. Packaged in a SOT23-5, the EMC1212 provides an accurate, low-cost, low-current, solution for critical temperature monitoring in applications such as embedded systems or computers. When used in combination with an SMSC Super I/O host, such as a keyboard controller, a complete thermal management system is created. A power down mode extends battery life in portable applications. The internal 11-bit sigma delta temperature-to-digital converter provides superb linearity, high accuracy and excellent noise immunity. The EMC1212 is designed to operate with 65nm or 90nm PNP substrate transistor used as a thermal diode with the collector connected to ground. APPLICATIONS „ „ Datasheet Desktop and Notebook Computers Hardware Management FEATURES „ „ „ „ Single Wire BBUS Interface Resistance Error Correction Beta Compensation External Temperature Monitor — 0.125°C resolution — ±1°C Accuracy 60°C to 100°C — Diode Fault Reporting „ Internal Temperature Monitor — Range 0°C to +85°C — 0.125°C resolution — ±1.5°C Accuracy 50°C to 70°C „ Supply: — 3.0V to 3.6V — <5uA in Standby SIMPLIFIED BLOCK DIAGRAM EMC1212 Switching Current Local Temp Diode DP DN Beta Comp & REC Analog Mux and anti-...