ETC2 ATS45CS3 Low-voltage ultra-low-power temperature sensor with high output drive Datasheet

aTS45C
LOW-VOLTAGE ULTRA-LOW-POWER
TEMPERATURE SENSOR WITH HIGH OUTPUT DRIVE
PRODUCT SPECIFICATION
Fully Released Specification
General Description
Pin Configuration
The aTS45C is a silicon integrated circuit temperature
sensor. The aTS45C maintains an accuracy of ±4°C
over a temperature range of −20°C to 100°C. At 25°C
(room temperature) the accuracy is calibrated to
typically better than ±2°C (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.
SOT3-Pin
- 23 3-lead
SOT-23
Package
aTS45C
Features
VOUT
•
Calibrated 25°C performance ±3°C
•
Low Operating Current: ≤ 25µA
•
Temperature Range: -20°C to 100°C
•
Extremely Linear Output Ramp: 10mV/°C
•
Output Ramp is Calibrated to Degrees Celsius
•
Low Self Heating: 0.04°C Typical in Still Air
•
Operating Voltage Range: +2.7V to +5.5V
•
Optional Single Positive Supply Operation at
Reduced Range: 10°C to 100°C
•
Non-linearity: ≤ 0.8°C
4
•
3-pin Pb-Free SOT-23 Package
3
•
Mobile Communications Terminals
•
Computers and Peripherals
•
Battery Management
•
FAX Machines/Printers/Copiers
•
Portable Medical Instruments
•
HVAC
•
Power Supply Modules
•
Disk Drives
3
GND
2
actual part marking below
Negative Bias Required
below 10°C
Accuracy (°C)
Applications
1
VDD
2
1
upper spec limits
0
lower spec limits
--1
--2
--3
-4
-20
0
10
20
25
40
60
80
100
Temperature (°C)
Accuracy vs. Temperature
Ordering Information
Part Number
Package
Temperature Range
Part Marking
How Supplied
aTS45CS3
3-Pin SOT-23
-20˚C to +100˚C
AGyw
3000 units on T&R
y – year, w - week
© Andigilog, Inc. 2006
www.andigilog.com
April 2006 - 70A03207
aTS45C
Absolute Maximum Ratings1
Parameter
Rating
Supply Voltage
+7V
Output Voltage
VDD + 0.5V
Continuous Current, any terminal
10mA
-60°C to +150°C
Storage Temperature Range
ESD
2,3
Thermal Resistance - θJA
Lead Temp
Human Body Model
Class 1B
Machine Model
Class A
SOT-23
336°C/W
Soldering (10 sec)
260°C
Infrared (20 sec)
235°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. 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
Parameter
Min
Max
Units
VDD
Supply Voltage
+2.7
+5.5
V
VOUT
Output Voltage
0
VDD
V
-20
+100
°C
TA
Operating Temperature Range
Electrical Characteristics4
Limits apply for -20°C ≤ T A ≤ +100°C and V D D = + 3.0V unless otherwise noted. Negative bias required for temperatures below 10°C
Parameter
Symbol
5
Accuracy
Conditions
Min
Typ
Max
Units
TA=+25°C
TA=-20°C (TMIN)
TA=+100°C (TMAX)
-3
±2
+3
°C
+4
°C
+4
°C
-4
-4
6
Non-linearity
±0.8
Supply Current - Output floating
7
Output Sink Capability
7
Output Source Capability
Average Output Slope (Sensor Gain)
Room Temp Output Voltage
Minimum Temperature
8
Self Heating
IDD
TA=+25°C
-20°C ≤ T A ≤ +100°C
°C
11
6
25
µA
µA
IOL
+2.7V < VDD < +5.5V
1
IOH
+2.7V < VDD < +5.5V
200
µA
10
mV/°C
AOUT
VOUT25
TA=+25°C
250
mV
Single Supply
See Fig 1
10
°C
SOT-23
0.0414
°C
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 = θJA x (VDD x IDD). Assumes a capacitive load.
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April 2006 - 70A03207
aTS45C
Output Voltage vs Temperature
Temp (ºC) = (VOUT) / 10mV/ºC
Single Supply
VOUT
(mV)
With Negative Bias
VOUT
(mV)
Basic Range Temperature Sensor
+10.0 ºC to +100 ºC
1000
1000
750
750
500
500
250
250
100
Full Range Temperature Sensor
-20 ºC to +100 ºC
0
10
25
50
75
100
-200
-20
Temperature (ºC)
+VDD
(2.7V to 5.5V)
aTS45C
0
25
+VDD
VOUT = +1000 mV at +100 ºC
VOUT = +250mV at +25 ºC
VOUT = +100mV at +10.0 ºC
(2.7V to 5.5V)
50
75
Temperature (ºC)
100
VOUT = +1000 mV at +100 ºC
VOUT = +250mV at +25 ºC
VOUT = -200mV at -20 ºC
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 0.04°C 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
© Andigilog, Inc. 2006
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.
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aTS45C
Typical Performance Characteristics
22
20
18
IDD ( mA)
IDD (µA)
16
14
12
10
8
6
4
2
VDD =+3V
0
-50
-25
0
25
50
75
100
125
Temperature (°C)
Figure 2. aTS45C Current vs Temperature
Typical Applications
5V
3.9K
VTemp
aTS45C
IN
Serial
REF Analog-to-Digital
Converter
1.00V
U1
FB
1µF
10K
U3
+
100K
SERIAL
DATA OUT
Adjustable
Shunt Voltage
Reference
CLOCK
U2
ENABLE
Figure 3. Serial Output Temperature to Digital Converter
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April 2006 - 70A03207
aTS45C
5V
30K
aTS45C
VTemp
8
IN
U1
Parallel Output
Analog-to-Digital
Converter
_
U2
5K
PARALLEL
DATA
OUTPUT
1.00V
+
VREF
INTR
U3
1µF
CS
15K
RD
WR
Figure 4. Parallel Output Temperature to Digital Converter
V+
R3
R4
R1
4.1V
Shunt
Voltage
Reference
U3
VT
+
U1
0.1µF
VOUT
–
R2
V+
aTS45C
VTemp
U2
Figure 5. Thermostat / Fan Controller
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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
© Andigilog, Inc. 2006
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
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aTS45C
Notes:
Andigilog, Inc.
8380 S. Kyrene Rd., Suite 101
Tempe, Arizona 85284
Tel: (480) 940-6200
Fax: (480) 940-4255
© Andigilog, Inc. 2006
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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
© Andigilog, Inc. 2006
-8www.andigilog.com
April 2006 - 70A03207
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