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. © Andigilog, Inc. 2006 -2www.andigilog.com 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. -3www.andigilog.com April 2006 - 70A03207 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 © Andigilog, Inc. 2006 -4www.andigilog.com 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 © Andigilog, Inc. 2006 -5www.andigilog.com 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 -6www.andigilog.com April 2006 - 70A03207 aTS45C Notes: Andigilog, Inc. 8380 S. Kyrene Rd., Suite 101 Tempe, Arizona 85284 Tel: (480) 940-6200 Fax: (480) 940-4255 © 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 © Andigilog, Inc. 2006 -8www.andigilog.com April 2006 - 70A03207