LM61

LM61 NSC | Alldatasheet

Document overview

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Technical content

Features

n Calibrated linear scale factor of +10 mV/˚C n Rated for full −30˚ to +100˚C range n Suitable for remote applications

Applications

n Accuracy at 25˚C ±2.0 or±3.0˚C (max) n Accuracy for −30˚C to +100˚C ±4.0˚C (max) n Accuracy for −25˚C to +85˚C ±3.0˚C (max) n Temperature Slope +10 mV/˚C n Power Supply Voltage Range +2.7V to +10V n Current Drain@ 25˚C 125 µA (max) n Nonlinearity ±0.8˚C (max) n Output Impedance 800 Ω (max) Typical Application DS012897-2 VO = (+10 mV/˚C x T ˚C) + 600 mV Temperature (T) Typical V O +100˚C +1600 mV +85˚C +1450 mV +25˚C +850 mV 0˚C +600 mV −25˚C +350 mV −30˚C +300 mV FIGURE 1. Full-Range Centigrade Temperature Sensor (−30˚C to +100˚C)

Ordering Information

Range (˚C) Specified Temperature Range Package Type LM61BIM3 T1B 1000 Units on Tape and Reel ± 3 −25˚C to +85˚C SOT-23LM61BIM3X T1B 3000 Units on Tape and Reel LM61CIM3 T1C 1000 Units on Tape and Reel ± 4 −30˚C to +100˚CLM61CIM3X T1C 3000 Units on Tape and Reel LM61BIZ LM61BIZ Bulk ± 3 −25˚C to +85˚C TO-92LM61CIZ LM61CIZ Bulk ± 4 −30˚C to +100˚C SOT-23 DS012897-1 Top View See NS Package Number MA03B TO-92 DS012897-25 Top View See NS Package Number Z03A www.national.com 2

Absolute Maximum Ratings(Note 1) Supply Voltage +12V to −0.2V Output Voltage (+V S + 0.6V) to −0.6V Output Current 10 mA Input Current at any pin (Note 2) 5 mA Storage Temperature −65˚C to +150˚C Maximum Junction Temperature JMAX ) +125˚C ESD Susceptibility (Note 3) : Human Body Model 2500V Machine Model 250V Lead Temperature: Soldering (10 seconds) +260˚C Vapor Phase (60 seconds) +215˚C Infrared (15 seconds) +220˚C Operating Ratings(Note 1) Specified Temperature Range: TMIN ≤ TA ≤ TMAX LM61C −30˚C ≤ TA ≤ +100˚C Supply Voltage Range (+VS) +2.7V to +10V Thermal Resistance,θJA(Note 5) SOT-23 TO-92 450˚C/W 180˚C/W

Electrical Characteristics

Unless otherwise noted, these specifications apply for +VS = +3.0 VDC .Boldface limits apply for TA = TJ = TMIN to TMAX ; all other limits TA = TJ = 25˚C. Parameter Conditions Typical (Note 6) LM61B LM61C Units (Limit)Limits Limits (Note 7) (Note 7) Accuracy (Note 8) ±2.0 ±3.0 ˚C (max) ±3.0 ±4.0 ˚C (max) Output Voltage at 0˚C +600 mV Nonlinearity (Note 9) ±0.6 ±0.8 ˚C (max) Sensor Gain +10 +9.7 +9.6 mV/˚C (min) (Average Slope) +10.3 +10.4 mV/˚C (max) Output Impedance +3.0V ≤ +V S ≤ +10V 0.8 2.3 0.8 2.3 kΩ (max) kΩ (max) kΩ (max) Line Regulation (Note 10) +3.0V ≤ +V S ≤ +10V ±0.7 ±0.7 mV/V (max) Quiescent Current +2.7V ≤ +V S ≤ +10V 82 125 125 µA (max) 155 155 µA (max) Change of Quiescent Current +2.7V≤ +VS ≤ +10V ±5µ A Temperature Coefficient of 0.2 µA/˚C Quiescent Current Long Term Stability (Note 11) T J=TMAX =+100˚C, for 1000 hours ±0.2 ˚C Note 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func- tional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.The guaranteed speci- fications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2:When the input voltage (VI) at any pin exceeds power supplies (VI < GND or VI > +VS), the current at that pin should be limited to 5 mA. Note 3:The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged di- rectly into each pin. Note 4:See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in any post 1986 National Semi- conductor Linear Data Book for other methods of soldering surface mount devices. Note 5:The junction to ambient thermal resistance (θJA) is specified without a heat sink in still air. Note 6:Typicals are at TJ = TA = 25˚C and represent most likely parametric norm. Note 7:Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Note 8:Accuracy is defined as the error between the output voltage and +10 mV/˚C times the device’s case temperature plus 600 mV, at specified conditions of volt- age, current, and temperature (expressed in ˚C). Note 9:Nonlinearity 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. Note 10:Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be com- puted by multiplying the internal dissipation by the thermal resistance. Note 11:For best long-term stability, any precision circuit will give best results if the unit is aged at a warm temperature, and/or temperature cycled for at least 46 hours before long-term life test begins. This is especially true when a small (Surface-Mount) part is wave-soldered; allow time for stress relaxation to occur. The ma- jority of the drift will occur in the first 1000 hours at elevated temperatures. The drift after 1000 hours will not continue at the first 1000 hour rate. www.national.com3

Typical Performance CharacteristicsThe LM61 in the SOT-23 package mounted to a printed circuit board as shown inFigure 2was used to generate the following thermal curves. Thermal Resistance Junction to Air DS012897-3 Thermal Time Constant DS012897-4 Thermal Response in Still Air with Heat Sink DS012897-5 Thermal Response in Stirred Oil Bath with Heat Sink DS012897-6 Thermal Response in Still Air without a Heat Sink DS012897-8 Quiescent Current vs. Temperature DS012897-9 Accuracy vs Temperature DS012897-10 Noise Voltage DS012897-11 www.national.com 4

1.0 Mounting

that LM61’s leads are attached to. minimize the load current that the LM61 is required to drive. and the thermal resistance for different conditions. FIGURE 2. Printed Circuit Board Used for Heat Sink to Generate All Curves. with 2 oz. Copper Foil or Similar.

1.0 Mounting(Continued)

2.0 Capacitive Loads

Figure 4. Over the specified temperature range the overall response time of the LM61. *Part soldered to 30 gauge wire. 1⁄2" square printed circuit board with 2 oz. foil with part attached as shown inFigure 2. ***Part glued and leads soldered to 1″ square of 1/16″ printed circuit board with 2oz. foil or similar. FIGURE 3. Temperature Rise of LM61 Due to FIGURE 4. LM61 No Decoupling Required for FIGURE 5. LM61 with Filter for Noisy Environment FIGURE 6. Simplified Schematic

3.0 Applications Circuits

4.0 Recommended Solder Pads for SOT-23 Package

FIGURE 7. Centigrade Thermostat FIGURE 8. Conserving Power Dissipation with Shutdown

Physical Dimensionsinches (millimeters) unless otherwise noted SOT-23 Molded Small Outline Transistor Package (M3) Order Number LM61BIM3 or LM61CIM3 TO-92 Plastic Package (Z) Order Number LM61BIZ or LM61CIZ www.national.com 8

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com LM61 2.7V, SOT-23 or TO-92 Temperature Sensor National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.