LM62 NSC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 7

Technical content

Features

n Calibrated linear scale factor of +15.6 mV/˚C n Rated for full 0˚C to +90˚C range with 3.0V supply n Suitable for remote applications

Applications

n Accuracy at 25˚C ±2.0 or±3.0˚C (max) n Temperature Slope +15.6 mV/˚C n Power Supply Voltage Range +2.7V to +10V n Current Drain@ 25˚C 130 µA (max) n Nonlinearity ±0.8˚C (max) n Output Impedance 4.7 k Ω (max) Connection Diagram

Ordering Information

LM62BIM3 T7B 1000 Units on Tape and Reel LM62BIM3X T7B 3000 Units on Tape and Reel LM62CIM3 T7C 1000 Units on Tape and Reel LM62CIM3X T7C 3000 Units on Tape and Reel Typical Application SOT-23 DS100893-1 Top View See NS Package Number MA03B DS100893-2 VO = (+15.6 mV/˚C x T˚C) + 480 mV Temperature (T) Typical V O +90˚C +1884 mV +70˚C +1572 mV +25˚C 870 mV 0˚C +480 mV FIGURE 1. Full-Range Centigrade Temperature Sensor

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 (T JMAX ) +125˚C ESD Susceptibility (Note 3) : Human Body Model 2500V Machine Model 250V Lead Temperature: Vapor Phase (60 seconds) +215˚C Infrared (15 seconds) +220˚C Operating Ratings(Note 1) Specified Temperature Range: TMIN ≤ TA ≤ TMAX LM62B, LM62C 0˚C ≤ TA ≤ +90˚C Supply Voltage Range (+VS) +2.7V to +10V Thermal Resistance,θJA(Note 5) 450˚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) LM62B LM62C Units (Limit)Limits Limits (Note 7) (Note 7) Accuracy (Note 8) ±2.0 ±3.0 ˚C (max) Output Voltage at 0˚C +480 mV Nonlinearity (Note 9) ±0.8 ±1.0 ˚C (max) Sensor Gain +16 +16.1 +16.3 mV/˚C (max) (Average Slope) +15.1 +14.9 mV/˚C (min) Output Impedance +3.0V ≤ +V S ≤ +10V 4.7 4.7 kΩ (max) 0˚C ≤ TA ≤ +75˚C, +VS = +2.7V 4.4 4.4 kΩ (max) Line Regulation (Note 10) +3.0V ≤ +V S ≤ +10V ±1.13 ±1.13 mV/V (max) Quiescent Current +2.7V ≤ +V S ≤ +10V 82 130 130 µA (max) 165 165 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 +15.6 mV/˚C times the device’s case temperature plus 480 mV, at specified conditions of voltage, 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.com 2

Typical Performance CharacteristicsTo generate these curves the LM62 was mounted to a printed circuit board as shown inFigure 2. Thermal Resistance Junction to Air DS100893-3 Thermal Time Constant DS100893-4 Thermal Response in Still Air with Heat Sink DS100893-5 Thermal Response in Stirred Oil Bath with Heat Sink DS100893-6 Thermal Response in Still Air without a Heat Sink DS100893-8 Quiescent Current vs. Temperature DS100893-9 Accuracy vs Temperature DS100893-10 Noise Voltage DS100893-11 www.national.com3

1.0 Mounting

that LM62’s leads are attached to. minimize the load current that the LM62 is required to drive. FIGURE 2. Printed Circuit Board Used for Heat Sink to Generate All Curves. with 2 oz. Copper Foil or Similar.

1.0 Mounting(Continued)

resistance for different conditions.

2.0 Capacitive Loads

Figure 4. Over the specified temperature range the overall response time of the LM62. part attached as shown inFigure 2. Note 13:Part soldered to 30 gauge wire. FIGURE 3. Temperature Rise of LM62 Due to FIGURE 4. LM62 No Decoupling Required for FIGURE 5. LM62 with Filter for Noisy Environment FIGURE 6. Simplified Schematic

3.0 Applications Circuits

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

Physical Dimensionsinches (millimeters) unless otherwise noted LIFE SUPPORT POLICY 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 SOT-23 Molded Small Outline Transistor Package (M3) Order Number LM62BIM3 or LM62CIM3 LM62 2.7V, 15.6 mV/˚C, SOT-23 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.