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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