Part Number : ASM121


Manufactures : Andigilog

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Description :

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 Instruments HVAC, Power Supply Modules Disk Drives Automotive Control Circuits 2 1 0 -1 -2 -3 -4 -40 -20 0 20 25 upper spec limits lower spec limits 125 40 60 80 100 120 Temperature (°C) Ordering Information Part Number aSM121Q3 m – month / year code Package 3-Lead QFN Temperature Range -30˚C to +125˚C Part Marking Jm How Supplied 3000 units on T&R July 2005 – 70A04006 © Andigilog, Inc. 2004 aSM121 Absolute Maximum Ratings1 Parameter Supply Voltage Output Voltage Continuous Current, any terminal Storage Temperature Range ESD2 Thermal Resistance – ΘJA Lead Temp Human Body Model Machine Model QFN-3 Rating +7V VDD + 0.5V 10mA -60°C to +150°C 4000V 400V TBD 260°C Notes: 1. Absolute maximum ratings are limits beyond which operation may cause permanent damage to the device. These are stress ratings only; functional operations at or above these limits is not implied. 2. Human Body Model: 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Machine Model: 200pF capacitor discharged directly into each pin. 3. These specifications are guaranteed only for the test conditions listed. Recommended Operating Ratings Symbol VDD VOUT TA Parameter Supply Voltage Output Voltage Operating Temperature Range Min +2.7 0 -30 Max +3.6 1.8 +125 Units V V °C Electrical Characteristics3 Limits apply for -40°C ≤ T A ≤ +125°C and V D D = + 3 .0V unless otherwise noted. Parameter Accura […]

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ASM121 Datasheet

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