ASM121 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
ASM121 Datasheet PDF : 8 Pages
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aSM121
SIMISTOR™ TEMPERATURE SENSOR
ULTRA-LOW-POWER SILICON THERMISTOR
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 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 non-
linearity.
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.
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
PRODUCT SPECIFICATION
Pin Configuration
QFN-3
VDD 1
VOUT
3
aSM121
2
GND
Top view, contacts underneath,
actual part marking below
Accuracy vs Temperature
4
3
2
1
0
-1
-2
-3
-4
-40 -20 0
25
20 40
upper spec limits
lower spec limits
125
60 80 100 120
Temperature (°C)
Ordering Information
Part Number
aSM121Q3
m – month / year code
© Andigilog, Inc. 2004
Package
3-Lead QFN
Temperature Range
-30˚C to +125˚C
Part Marking
Jm
www.andigilog.com
How Supplied
3000 units on T&R
July 2005 - 70A04006
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