ASM121

www.DataSheet4U.com SIMISTOR™ TEMPERATURE SENSOR ULTRA-LOW-POWER SILICON THERMISTOR aSM121 New Release Specification 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 highaccuracy 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. The aSM121 output voltage ramp has a positive slope of 10mV/°C that is independent of supply voltage. The aSM121 has a guaranteed room temperature (25°C) accuracy of ±1°C. The aSM121 does not require external calibration - each device is calibrated at the factory. PRODUCT SPECIFICATION Pin Configuration QFN-3 VDD 1 3 GND aSM121 VOUT 2 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 4 3 Top view, contacts underneath, actual part marking below Accuracy vs Temperature Accuracy (°C) Applications Mobile Phones Mobile Communications Terminals Computers Battery Management FAX Machines/Printers/Copiers Portable Medical ...