The EMC1403 is a high-accuracy SMBus temperature sensor designed for monitoring three temperature channels: two external diodes and one internal diode. It provides ±1°C accuracy for external diode temperatures between 0°C and 100°C and ±2°C accuracy for the internal diode. The device supports Resistance Error Correction to compensate for up to 100 ohms of series resistance and automatic beta compensation to accommodate CPU thermal diodes from 45nm, 65nm, and 90nm processors. Temperature resolution is 0.125°C. It operates from a 3.3V supply and includes programmable ALERT and THERM output limits. The EMC1403 is available in 10-pin 3mm × 3mm DFN, 10-pin MSOP, and 14-pin SOIC packages, all RoHS compliant. It supports SMBus 2.0 and includes features for diode fault detection and digital filtering.
The EMC1403 and EMC1404 are high accuracy, low cost, System Management Bus (SMBus) temperature sensors. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 45nm, 65nm and 90nm processors) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications.
Each device provides ±1° accuracy for external diode temperatures and ±2°C accuracy for the internal diode temperature. The EMC1403 monitors three temperature channels (two external and one internal). The EMC1404 monitors four temperature channels (three external and one internal).
Resistance Error Correction automatically eliminates the temperature error caused by series resistance allowing greater flexibility in routing thermal diodes. Beta Compensation eliminates temperature errors caused by low, variable beta transistors common in today's fine geometry processors. The automatic beta detection feature monitors each external diode/transistor and determines the optimum sensor settings for accurate temperature measurements regardless of processor technology. This frees the user from providing unique sensor configurations for each temperature monitoring application. These advanced features plus ±1°C measurement accuracy provide a low-cost, highly flexible and accurate solution for critical temperature monitoring applications.
Additional Features
| Microchip Technology, Inc. | |
|---|---|
| Product Category | Transistors |
| Product Number | EMC1403 |
