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ATS45C
LOW-VOLTAGE ULTRA-LOW-POWER TEMPERATURE SENSOR WITH HIGH OUTPUT DRIVE
Fully Released Specification
General Description
The ATS45C is a silicon integrated circuit temperature sensor. The ATS45C maintains an accuracy of 4C over a temperature range of -20C to 100C. At 25C (room temperature) the accuracy is calibrated to typically better than 2C (VOUT = 250mV). This calibration is done during probe and guaranteed on each device. The ATS45C also maintains one of the lowest power consumption requirement in the industry and therefore reduces any inaccuracies due to selfheating.
PRODUCT SPECIFICATION
Pin Configuration
SOT - 23 3-lead SOT-23 3-Pin Package
VDD
1
ATS45C VOUT
2
3
GND
Features
* * * * * * * * * * Calibrated 25C performance 3C Low Operating Current: 25A Temperature Range: -20C to 100C Extremely Linear Output Ramp: 10mV/C Output Ramp is Calibrated to Degrees Celsius Low Self Heating: 0.04C Typical in Still Air Operating Voltage Range: +2.7V to +5.5V Optional Single Positive Supply Operation at Reduced Range: 10C to 100C Non-linearity: 0.8C
Accuracy (C)
actual part marking below
Negative Bias Required below 10C
4 3 2 1 0 -1 -2 -3 -4 -20 0
upper spec limits lower spec limits
3-pin Pb-Free SOT-23 Package
Applications
* * * * * * * * Mobile Communications Terminals Computers and Peripherals Battery Management FAX Machines/Printers/Copiers Portable Medical Instruments HVAC Power Supply Modules Disk Drives
10
20
25
40
60
80
100
Temperature (C)
Accuracy vs. Temperature
Ordering Information
Part Number ATS45CS3
y - year, w - week
Package 3-Pin SOT-23
Temperature Range -20C to +100C
Part Marking AGyw
How Supplied 3000 units on T&R
(c) Andigilog, Inc. 2006
www.andigilog.com
April 2006 - 70A03207
ATS45C
Absolute Maximum Ratings1
Parameter
Supply Voltage Output Voltage Continuous Current, any terminal Storage Temperature Range ESD
2,3
Rating
+7V VDD + 0.5V 10mA -60C to +150C Class 1B Class A 336C/W 260C 235C
Human Body Model Machine Model SOT-23 Soldering (10 sec) Infrared (20 sec)
Thermal Resistance - JA Lead Temp
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 1.5k resistor into each pin. Machine Model: 200pF capacitor discharged directly into each pin. 3. ESD Classification per JESD22-A114C.01 for Human Body Model and JESD22A115 for Machine Model. 4. 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 -20
Max
+5.5 VDD +100
Units
V V C
Electrical Characteristics4
Limits apply for -20C T A +100C and V D D = + 3.0V unless otherwise noted. Negative bias required for temperatures below 10C
Parameter
Accuracy
5
Symbol
Conditions
TA=+25C TA=-20C (TMIN) TA=+100C (TMAX)
Min
-3 -4 -4
Typ
2
Max
+3 +4 +4
Units
C C C C
Non-linearity
6
0.8 IDD IOL
7
Supply Current - Output floating Output Sink Capability
7
TA=+25C -20C T A +100C +2.7V < VDD < +5.5V +2.7V < VDD < +5.5V TA=+25C Single Supply See Fig 1 SOT-23
11 6 1 200 10 250 10 0.0414 25
A A A
mV/C mV C C
Output Source Capability
IOH AOUT VOUT25
Average Output Slope (Sensor Gain) Room Temp Output Voltage Minimum Temperature Self Heating
8
Notes:
5. 6. 7. 8. Accuracy (expressed in C) = Difference between calculated output voltage and measured output voltage. Calculated output voltage = 10mV/C multiplied by device's case temperature at specified conditions of temperature, voltage and power supply. Non-linearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the device's rated temperature range. Lowest output current should be targeted; higher currents result in more self-heating of the device. Max Self Heating = JA x (VDD x IDD). Assumes a capacitive load.
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(c) Andigilog, Inc. 2006
April 2006 - 70A03207
ATS45C
Output Voltage vs Temperature
Temp (C) = (VOUT) / 10mV/C
VOUT (mV) 1000 750 500 250 100 10 25 50 75 100
Single Supply
Basic Range Temperature Sensor +10.0 C to +100 C
VOUT (mV) 1000 750 500 250 0
With Negative Bias
Full Range Temperature Sensor -20 C to +100 C
Temperature (C) +VDD
-200 -20
0 +VDD
25
50 75 Temperature (C)
VOUT = +1000 mV at +100 C VOUT = +250mV at +25 C VOUT = -200mV at -20 C
100
(2.7V to 5.5V)
VOUT = +1000 mV at +100 C VOUT = +250mV at +25 C VOUT = +100mV at +10.0 C
(2.7V to 5.5V)
ATS45C
VOUT ATS45C
VOUT REXTERNAL = V- / 10uA
Negative Supply (V-)
Figure 1. ATS45C Output Voltage vs Temperature
Mounting
The ATS45C can be easily mounted by gluing or cementing it to a surface. In this case, its temperature will be within about 0.04C of the temperature of the surface it is attached to if the ambient air temperature is almost the same as the surface temperature. If the air temperature is much higher or lower than the surface temperature, the actual temperature of the ATS45C die will be at an intermediate temperature between the surface temperature and the air temperature. To ensure good thermal conductivity, the backside of the ATS45C die is directly attached to the GND pin. The lands and traces to the ATS45C will, of course, be part of the printed circuit board, which is the object whose temperature is being measured. These printed circuit board lands and traces will not cause the ATS45C's temperature to deviate from the desired temperature. Alternatively, the ATS45C can be mounted inside a sealed-end metal tube, and can then be dipped into a bath or screwed into a threaded hole in a tank. As with any IC, the ATS45C and accompanying wiring and circuits must be kept insulated and dry to avoid leakage and corrosion. This is especially true if the circuit may operate at cold temperatures where condensation can occur. Printed-circuit coatings and varnishes such as Humiseal and epoxy paint or dips can be used to ensure that moisture cannot corrode the ATS45C or its connections.
(c) Andigilog, Inc. 2006
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April 2006 - 70A03207
ATS45C
Typical Performance Characteristics
22 20 18 16
IDD (A)
IDD ( mA)
14 12 10 8 6 4 2 0 -50 -25 0 25 50 75 100 125
VDD =+3V
Temperature (C)
Figure 2. ATS45C Current vs Temperature
Typical Applications
5V
3.9K VTemp IN Serial REF Analog-to-Digital Converter 1.00V + FB 1F 10K U2 ENABLE Adjustable Shunt Voltage Reference U3 CLOCK
ATS45C
U1
SERIAL DATA OUT
100K
Figure 3. Serial Output Temperature to Digital Converter
(c) Andigilog, Inc. 2006
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April 2006 - 70A03207
ATS45C
5V
30K
ATS45C
U1
VTemp
IN
8
PARALLEL DATA OUTPUT
_ U2 5K 1F 15K + 1.00V VREF
Parallel Output Analog-to-Digital Converter INTR
U3 CS RD WR
Figure 4. Parallel Output Temperature to Digital Converter
V+
R3
R4 4.1V Shunt Voltage Reference R1 VT + U1 0.1F R2 - VOUT
U3
V+
ATS45C
U2
VTemp
Figure 5. Thermostat / Fan Controller
(c) Andigilog, Inc. 2006
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April 2006 - 70A03207
ATS45C
SOT-23 Package Dimensions
0.370 mm (min) 0.510 mm (max)
2.100 mm (min) 2.640 mm (max)
1.200 mm (min) 1.400 mm (max)
0.450 mm (min) 0.600 mm (max) 2.800 mm (min) 3.040 mm (max)
0.890 mm (min) 1.120 mm (max) 0.013 mm (min) 0.100 mm (max)
0.085 mm (min) 0.180 mm (max) 1.780 mm (min) 2.050 mm (max) 0.55ref mm
Tape and Reel Data
W A0 B0 K0 P0 P1 P2 T F
8.00 + 0.30 / -0.01 mm 3.15 0.10 mm 2.77 0.10 mm 1.22 0.10 mm 4.00 0.10 mm 4.00 0.10 mm 2.00 0.05 mm 0.29 0.13 mm 3.50 0.05 mm
(c) Andigilog, Inc. 2006
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April 2006 - 70A03207
ATS45C
Notes:
Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284 Tel: (480) 940-6200 Fax: (480) 940-4255 (c) Andigilog, Inc. 2006 -7www.andigilog.com April 2006 - 70A03207
ATS45C
Data Sheet Classifications
Preliminary Specification
This classification is shown on the heading of each page of a specification for products that are either under development(design and qualification), or in the formative planning stages. Andigilog reserves the right to change or discontinue these products without notice.
New Release Specification
This classification is shown on the heading of the first page only of a specification for products that are either under the later stages of development(characterization and qualification), or in the early weeks of release to production. Andigilog reserves the right to change the specification and information for these products without notice.
Fully Released Specification
Fully released datasheets do not contain any classification in the first page header. These documents contain specification on products that are in full production. Andigilog will not change any guaranteed limits without written notice to the customers. Obsolete datasheets that were written prior to January 1, 2001 without any header classification information should be considered as obsolete and non-active specifications, or in the best case as Preliminary Specifications.
Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284 Tel: (480) 940-6200 Fax: (480) 940-4255 (c) Andigilog, Inc. 2006 -8www.andigilog.com April 2006 - 70A03207

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