ASM121 ETC-unknow, ASM121 Datasheet

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ASM121

Manufacturer Part Number
ASM121
Description
Simistor ?emperature Sensor Ultra-low-power Silicon Thermistor
Manufacturer
ETC-unknow
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ASM121Q3
Manufacturer:
ANDIGILOG
Quantity:
20 000
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
Applications
x
x
x
x
x
x
x
x
x
Ordering Information
© Andigilog, Inc. 2004
Precision Calibrated to ±1°C at 25°C
Temperature Range: -30°C to 125°C
Extremely Linear Output Ramp: 10mV/°C
0qC Output: 0.50V
Output Ramp is Calibrated to Degrees Celsius
Low Operating Current: 14PA
Operating Voltage Range: +2.7 V to +3.6V
Non-linearity: ^ 0.8qC
1.2mm x 1.5mm QFN Package
Mobile Phones
Mobile Communications Terminals
Computers
Battery Management
FAX Machines/Printers/Copiers
Portable Medical Instruments
HVAC, Power Supply Modules
Disk Drives
Automotive Control Circuits
m – month / year code
Part Number
aSM121Q3
3-Lead QFN
Package
www.andigilog.com
Temperature Range
-30˚C to +125˚C
U
-4
-4
-1
-
-1
-
-2
-
-2
-
-3
-
-3
-
4
4
3
3
2
2
1
1
0
0
Pin Configuration
Accuracy vs Temperature
LTRA
-40
-40
S
I
MISTOR™ T
-L
-20
-20
OW
P
RODUCT
Part Marking
V
V
-P
0
0
Temperature (°C)
Temperature (°C)
V
V
OUT
OUT
DD
DD
OWER
Top view, contacts underneath,
Jm
20
20
actual part marking below
25
25
2
2
1
1
40
40
aSM121
aSM121
QFN-3
QFN-3
EMPERATURE
S
ILICON
S
60
60
PECIFICATION
3000 units on T&R
80
80
3
3
How Supplied
lower spec limits
lower spec limits
upper spec limits
upper spec limits
July 2005 - 70A04006
aSM121
T
GND
GND
100
100
HERMISTOR
120
120
S
125
125
ENSOR

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ASM121 Summary of contents

Page 1

... 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 ...

Page 2

... I +2.7V < V < +3. +2.7V < V < +3. OUT V T =+0°C OUT0 =+25°C OUT25 A QFN-3 ). Assumes a capacitive load www.andigilog.com aSM121 Units V V °C Min Typ Max Units -1 ±0 ± ±1 +3 ±0 — 25 200 10 mV/°C 500 750 ...

Page 3

... To ensure good thermal conductivity, the backside of the aSM121 die is directly attached to the GND pin. The lands and traces to the aSM121 will, of course, be part of the printed circuit board, which is the object © Andigilog, Inc. 2004 V ...

Page 4

... Temperature (°C) Temperature (°C) Temperature (°C) Temperature (°C) Temperature (°C) Temperature (°C) Figure 2. aSM121 Current vs Temperature 3.3V 3. Temp Analog-to-Digital REF Converter 1.75V + 100K Adjustable FB Shunt Voltage Reference U2 10K - 4 - www.andigilog.com aSM121 ...

Page 5

... Figure 4. Parallel Output Temperature to Digital Converter (Full Scale = +125˚C) R4 Shunt Voltage Reference 3.3 © Andigilog, Inc. 2004 3.3V 15K IN Parallel Output Analog-to-Digital _ Converter V U2 REF 1.75V + 15K 3 2. 0.1PF R2 aSM121 V Temp U2 Figure 5. Thermostat / Fan Controller - 5 - www.andigilog.com aSM121 8 PARALLEL DATA OUTPUT INTR OUT – July 2005 - 70A04006 ...

Page 6

... Top View TWUW TWUW Figure 6. Package Outline 2.00 ± 0.05 SEC - BB 0.254 ± 0.013 SEC - BB 10 MAX 1.75 ± 0.10 Figure 7. Tape Dimensions and Part Orientation - 6 - www.andigilog.com aSM121 0.350 0.350 0.203 0.203 ± 0.050 ± 0.050 ± 0.025 ± 0.025 0.500 0.500 ± 0.050 2-PL ± 0.050 2-PL ...

Page 7

... Obsolete datasheets that were written prior to January 1, 2001 without any header classification information should be considered as obsolete and non-active specifications the best case as Preliminary Specifications. Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284-2120 Tel: (480) 940-6200 Fax: (480) 940-4255 © Andigilog, Inc. 2004 - 7 - www.andigilog.com aSM121 July 2005 - 70A04006 ...

Page 8

... Notes: Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284-2120 Tel: (480) 940-6200 Fax: (480) 940-4255 © Andigilog, Inc. 2004 - 8 - www.andigilog.com aSM121 July 2005 - 70A04006 ...

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