ATS45C

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 ±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. PRODUCT SPECIFICATION Pin Configuration SOT - 23 3-lead SOT-23 3-Pin Package VDD 1 aTS45C VOUT 2 3 GND Features • • • • • • • • • • 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 Accuracy (°C) actual part marking below Negative Bias Required below 10°C 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 Temperature (°C) Accuracy vs. Temperature Ordering Information Part Number aTS45CS3 y – year, w - week Package 3-Pin SOT-23 Temperature Range -20˚C to +100˚C Part Marking AGyw How Supplied 3000 units on T&R © 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 -60°C to +150°C Class 1B Class A 336°C/W 260°C 235°C Human Body Model Machine Model SOT-23 Soldering (10 sec) Infrared (20 sec) Thermal Resistance - θJA 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 1.5kΩ 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 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 -20°C ≤ T A ≤ +100°C and V D D = + 3.0V unless otherwise noted. Negative bias required for temperatures below 10°C Parameter Accuracy 5 Symbol Conditions TA=+25°C TA=-20°C (TMIN) TA=+100°C (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=+25°C -20°C ≤ T A ≤ +100°C +2.7V < VDD < +5.5V +2.7V < VDD < +5.5V TA=+25°C Single Supply See Fig 1 SOT-23 11 6 1 200 10 250 10 0.0414 25 µA µA µA 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 = θJA x (VDD x IDD). Assumes a capacitive load. -2www.andigilog.com © Andigilog, Inc. 2006 April 2006 - 70A03207 aTS45C Output Voltage vs Temperature Temp (ºC) = (VOUT) / 10mV/ºC VOUT (mV) 1000 750 500 250 100 10 25 50 75 100 Single Supply Basic Range Temperature Sensor +10.0 ºC to +100 ºC VOUT (mV) 1000 750 500 250 0 With Negative Bias Full Range Temperature Sensor -20 ºC to +100 ºC Temperature (ºC) +VDD -200 -20 0 +VDD 25 50 75 Temperature (ºC) VOUT = +1000 mV at +100 ºC VOUT = +250mV at +25 ºC VOUT = -200mV at -20 ºC 100 (2.7V to 5.5V) VOUT = +1000 mV at +100 ºC VOUT = +250mV at +25 ºC VOUT = +100mV at +10.0 ºC (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 0.04°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 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. © Andigilog, Inc. 2006 -3www.andigilog.com April 2006 - 70A03207 aTS45C Typical Performance Characteristics 22 20 18 16 IDD (µA) 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 1µF 10K Adjustable Shunt Voltage Reference U2 ENABLE U3 CLOCK aTS45C U1 SERIAL DATA OUT 100K Figure 3. Serial Output Temperature to Digital Converter © Andigilog, Inc. 2006 -4www.andigilog.com April 2006 - 70A03207 aTS45C 5V 30K aTS45C U1 VTemp IN 8 PARALLEL DATA OUTPUT _ U2 5K 1µF 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 0.1µF R2 – VOUT U3 V+ aTS45C U2 VTemp 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 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 © Andigilog, Inc. 2006 -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