Microchip – MCP9902: Low Temperature Remote Diode Sensor




The MCP9902 is a high accuracy, low-cost, System Management Bus (SM-Bus) temperature sensor.

The MCP9902 monitors an internal and external diode channel. 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.

• ±1°C accuracy over -40°C to +65°C with remote diode
• ±2°C maximum accuracy over +85°C to +125°C with remote diode
• ±1°C accuracy internal temperature monitor with 0.125°C resolution
• 3.0V to 3.6V operating voltage
• -40°C to +125°C temperature range
• Supports up to 2.2nF diode filter capacitor
• Up to 400kHz clock rate
• Programmable SMBus address
• 2kV HBM ESD protection
• 8-lead 2 x 2mm WDFN package