aTS51 LOW-VOLTAGE SOT-23 TEMPERATURE SENSOR WITH HIGH OUTPUT DRIVE PRODUCT SPECIFICATION New Release Specification General Description Pin Configuration The aTS51 is a high-precision CMOS temperature sensor that provides a cost-effective solution for applications requiring high-accuracy low-power temperature monitoring. The aTS51 is ideally suited for applications requiring high drive current. The aTS51 output voltage ramp is extremely linear and has a slope of 10mV/°C. With a supply voltage of 2.7V to 6V, the aTS51 is accurate to ±1°C over a temperature range of −40°C to 125°C and has a typical room temperature accuracy of ±0.5°C. Reducing the supply voltage to 2.7V does not change the negative and positive temperature extremes. As well, the aTS51 does not require external calibration. Calibration of each device is performed at the factory. SOT- 23 3-lead 1 VDD aTS51 VOUT 3 GND 2 actual part marking below Features • Precision Calibrated to ±1°C at 25°C • Low Output Impedance for 1mA Load • Temperature Range: -40°C to 125°C • Extremely Linear Output Ramp: 10mV/°C • Output Ramp is Calibrated to Degrees Celsius 4 3 • Low Operating Current: ≤ 130μA 2 • Low Self Heating: 0.2°C Typical in Still Air • Operating Voltage Range: +2.7V to +6V Uses a Single Positive Supply • Non-linearity: ≤ 0.8°C Accuracy (°C) • Accuracy vs Temperature • Mobile Phones • Mobile Communications Terminals • Computers • Battery Management • FAX Machines/Printers/Copiers • Portable Medical Instruments • HVAC • Power Supply Modules • Disk Drives • Automotive Control Circuits upper spec limit 1 0 -1 -2 -3 -4 -50 Applications VDD =+5V lower spec limit -40 25 0 50 100 125 Temperature (°C) Ordering Information Part Number Package Temperature Range Part Marking How Supplied aTS51S3 3-Pin SOT-23 -40˚C to +125˚C AByw 3000 units on T&R y – year, w - week © Andigilog, Inc. 2003 www.andigilog.com 70A03203-003 aTS51 Absolute Maximum Ratings1 Parameter Supply Voltage +7V Output Voltage VDD + 0.5V Continuous Current, any terminal Storage Temperature Range ESD2 Human Body Model 15mA -60°C to +150°C 2000V Machine Model 250V 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 operation 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. These specifications are guaranteed only for the test conditions listed. Rating 336°C/W Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C Recommended Operating Ratings Symbol Parameter Min Max Units VDD Supply Voltage +2.7 +6 V VOUT Output Voltage 0 VDD V -40 +125 °C TA Operating Temperature Range Electrical Characteristics3 Limits apply for -40°C ≤ T A ≤ +125°C and V D D = + 5.0V unless otherwise noted. Parameter Symbol Accuracy4 Conditions Min Typ Max Units TA=+25°C TA=-40°C (TMIN) TA=+125°C (TMAX) -1 ±0.5 +1 °C -3 ±1 +3 °C -3 ±1 +3 °C 5 Non-linearity ±0.8 Supply Current – Output floating IDD TA=+25°C Output Sink Capability6 IOL +2.7V < VDD < +6V IOH +2.7V < VDD < +6V Output Source Capability6 Average Output Slope °C 130 1 μA mA 1 mA 10 mV/°C TA=+25°C 750 mV SOT-23 0.21840 °C AOUT (Sensor Gain) Room Temperature Output Voltage Self Heating7 VOUT25 Notes: 4. 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. 5. 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. 6. Lowest output current should be targeted; higher currents result in more self-heating of the device. 7. Max Self Heating = θJA x (VDD x IDD). Assumes a capacitive load. © Andigilog, Inc. 2003 -2www.andigilog.com 70A03203-004 aTS51 VOUT (mV) 1750 1500 750 500 100 -50 -40 -25 0 25 50 75 100 125 Temperature (ºC) Temp (ºC) = (VOUT – 500mV) / 10mV/ºC Figure 1. aTS51 Output Voltage vs. Temperature Mounting The aTS51 can be easily mounted by gluing or cementing it to a surface. In this case, its temperature will be within about 0.2°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 aTS51 die will be at an intermediate temperature between the surface temperature and the air temperature. To ensure good thermal conductivity, the backside of the aTS51 die is directly attached to the GND pin. The lands and traces to the aTS51 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 aTS51’s temperature to deviate from the desired temperature. Alternatively, the aTS51 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 aTS51 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 aTS51 or its connections. NOTE: When taking advantage of the high current drive capability of the aTS51 while driving resistive loads, it is necessary to apply the appropriate thermal mounting techniques as described above. Failure to do so will result in a loss of accuracy due to increased self heating. © Andigilog, Inc. 2003 -3www.andigilog.com 70A03203-004 aTS51 Typical Performance Characteristics VDD =+5V Accuracy (°C) 4 3 2 upper spec limit 1 0 -1 -2 -3 lower spec limit -4 -50 -40 25 0 50 125 100 Temperature (°C) Figure 2. aTS51 Accuracy Range vs Temperature 130 VDD = +5V 120 110 100 IDD ( mA) IDD (µA) 90 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 Temperature (°C) Figure 3. aTS51 Current vs Temperature © Andigilog, Inc. 2003 -4www.andigilog.com 70A03203-004 aTS51 Typical Applications 5V 3.9K VTemp aTS51 IN Serial REF Analog-to-Digital Converter 1.75V U1 U3 + 100K FB SERIAL DATA OUT Adjustable Shunt Voltage Reference CLOCK 1μF U2 10K ENABLE Figure 4. Serial Output Temperature to Digital Converter (Full Scale = +125˚C) 5V 30K VTemp aTS51 8 IN U1 Parallel Output Analog-to-Digital Converter _ U2 5K + PARALLEL DATA OUTPUT 1.75V VREF INTR U3 1μF CS 15K RD WR Figure 5. Parallel Output Temperature to Digital Converter (Full Scale = +125˚C) © Andigilog, Inc. 2003 -5www.andigilog.com 70A03203-004 aTS51 Typical Applications (cont.) V+ R3 R4 R1 4.1V Shunt Voltage Reference VT + U1 U3 0.1μF VOUT – R2 V+ aTS51 VTemp U2 Figure 6. Thermostat/Fan Controller © Andigilog, Inc. 2003 -6www.andigilog.com 70A03203-004 aTS51 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 B © Andigilog, Inc. 2003 8.00 + 0.30 / -0.10 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 -7www.andigilog.com 70A03203-004 aTS51 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. 7404 W. Detroit St., Suite 100 Chandler, Arizona 85226-2422 Tel: (480) 940-6200 Fax: (480) 940-4255 © Andigilog, Inc. 2003 -8www.andigilog.com 70A03203-004 aTS51 Notes: Andigilog, Inc. 7404 W. Detroit St., Suite 100 Chandler, Arizona 85226-2422 Tel: (480) 940-6200 Fax: (480) 940-4255 © Andigilog, Inc. 2003 -9www.andigilog.com 70A03203-004