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General Description
The aSM121 is a high-precision, 3-lead CMOS silicon thermistor in an ultra-small leadless package that provides a cost-effective solution for applications requiring high-accuracy low-power temperature monitoring. The aSM121 functions in a way that is similar to a PTC thermistor. However, it is linear-calibrated, enabling application developers to directly interpret output voltage as temperature without complex compensation for nonlinearity.

Features
• Precision Calibrated to ±1°C at 25°C
• Temperature Range: -30°C to 125°C
• Extremely Linear Output Ramp: 10mV/°C
• 0°C Output: 0.50V
• Output Ramp is Calibrated to Degrees Celsius
• Low Operating Current: 14μA
• Operating Voltage Range: +2.7 V to +3.6V
• Non-linearity: ≤ 0.8°C
• 1.2mm x 1.5mm QFN Package

Applications
• Mobile Phones
• Mobile Communications Terminals
• Computers
• Battery Management
• FAX Machines/Printers/Copiers
• Portable Medical Instruments
• HVAC, Power Supply Modules
• Disk Drives
• Automotive Control Circuits