Product Folder Sample & Buy Technical Documents Support & Community Tools & Software LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 LM35 Precision Centigrade Temperature Sensors FEATURES DESCRIPTION • • • • • • • • • • • The LM35 series are precision integrated-circuit temperature sensors, with an output voltage linearly proportional to the Centigrade temperature. Thus the LM35 has an advantage over linear temperature sensors calibrated in ° Kelvin, as the user is not required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. The LM35 does not require any external calibration or trimming to provide typical accuracies of ±¼°C at room temperature and ±¾°C over a full −55°C to +150°C temperature range. Low cost is assured by trimming and calibration at the wafer level. The low output impedance, linear output, and precise inherent calibration of the LM35 make interfacing to readout or control circuitry especially easy. The device is used with single power supplies, or with plus and minus supplies. As the LM35 draws only 60 μA from the supply, it has very low self-heating of less than 0.1°C in still air. The LM35 is rated to operate over a −55°C to +150°C temperature range, while the LM35C is rated for a −40°C to +110°C range (−10° with improved accuracy). The LM35 series is available packaged in hermetic TO transistor packages, while the LM35C, LM35CA, and LM35D are also available in the plastic TO-92 transistor package. The LM35D is also available in an 8-lead surface-mount smalloutline package and a plastic TO-220 package. 1 2 Calibrated Directly in ° Celsius (Centigrade) Linear + 10 mV/°C Scale Factor 0.5°C Ensured Accuracy (at +25°C) Rated for Full −55°C to +150°C Range Suitable for Remote Applications Low Cost Due to Wafer-Level Trimming Operates from 4 to 30 V Less than 60-μA Current Drain Low Self-Heating, 0.08°C in Still Air Nonlinearity Only ±¼°C Typical Low Impedance Output, 0.1 Ω for 1 mA Load +VS (4 V to 20 V) LM35 +VS OUTPUT 0 mV + 10.0 mV/°C Figure 1. Basic Centigrade Temperature Sensor (+2°C to +150°C) LM35 VOUT R1 tVS Choose R1 = –VS / 50 µA VOUT = 1500 mV at 150°C VOUT = 250 mV at 25°C VOUT = –550 mV at –55°C Figure 2. Full-Range Centigrade Temperature Sensor 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1999–2013, Texas Instruments Incorporated LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. CONNECTION DIAGRAMS METAL CAN PACKAGE TO (NDV) +VS SMALL-OUTLINE MOLDED PACKAGE SOIC-8 (D) TOP VIEW VOUT GND t Case is connected to negative pin (GND) VOUT N.C. 1 2 8 7 +VS N.C. N.C. 3 6 N.C. GND 4 5 N.C. N.C. = No connection PLASTIC PACKAGE TO-92 (LP) BOTTOM VIEW PLASTIC PACKAGE TO-220 (NEB) +VS VOUT GND LM 35DT +VS GND VOUT Tab is connected to the negative pin (GND). NOTE: The LM35DT pinout is different than the discontinued LM35DP 2 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 ABSOLUTE MAXIMUM RATINGS (1) (2) MIN MAX Supply voltage –0.2 35 Output voltage –1 6 V 10 mA Output current Electrostatic discharge (ESD) susceptibility (3) Storage temperature Lead temperature –60 180 TO-92 Package –60 150 TO-220 Package –65 150 SOIC-8 Package –65 150 TO Package (soldering, 10 seconds) TO-92 and TO-220 Package (soldering, 10 seconds) 260 SOIC Package 220 Infrared (15 seconds) °C °C 215 LM35D (3) (4) V 300 Vapor phase (60 seconds) (2) V 2500 TO Package Specified operating temperature LM35, LM35A range: TMIN to TMAX (4) LM35C, LM35CA (1) UNIT –55 150 –40 110 0 100 °C If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. See Note 1. Human body model, 100 pF discharged through a 1.5-kΩ resistor. Thermal resistance of the TO-46 package is 400°C/W, junction to ambient, and 24°C/W junction to case. Thermal resistance of the TO92 package is 180°C/W junction to ambient. Thermal resistance of the small outline molded package is 220°C/W junction to ambient. Thermal resistance of the TO-220 package is 90°C/W junction to ambient. For additional thermal resistance information see table in the APPLICATIONS section. ELECTRICAL CHARACTERISTICS (1) (2) LM35A PARAMETER Accuracy (5) TEST CONDITIONS TYP TESTED LIMIT (3) TA = 25°C ±0.2 ±0.5 TA = –10°C ±0.3 TA = TMAX ±0.4 ±1 ±0.4 ±1 TA = TMIN TMIN ≤ TA ≤ TMAX ±0.18 Sensor gain (average slope) TMIN ≤ TA ≤ TMAX +10 +9.9, +10.1 Load regulation (7) 0 ≤ IL ≤ 1 mA TA = 25°C ±0.4 ±1 TMIN ≤ TA ≤ TMAX ±0.5 (1) (2) (3) (4) (5) (6) (7) TA = 25°C ±0.01 4 V ≤ VS ≤ 30 V ±0.02 DESIGN LIMIT (4) TYP TESTED LIMIT (3) ±0.2 ±0.5 ±0.3 Nonlinearity (6) Line regulation (7) LM35CA ±0.4 ±0.35 ±0.05 ±1 °C ±1 ±0.4 ±1.5 ±0.3 °C +10 +9.9, +10.1 mV/°C ±1 ±0.5 ±0.01 ±0.1 UNITS (MAX.) ±0.15 ±0.4 ±3 DESIGN LIMIT (4) ±0.02 ±3 mV/mA ±0.05 ±0.1 mV/V Unless otherwise noted, these specifications apply: −55°C ≤ TJ ≤ 150°C for the LM35 and LM35A; −40°C ≤ TJ ≤ 110°C for the LM35C and LM35CA; and 0°C ≤ TJ ≤ 100°C for the LM35D. VS = 5 Vdc and ILOAD = 50 μA, in the circuit of Figure 2. These specifications also apply from +2°C to TMAX in the circuit of Figure 1. Specifications in boldface apply over the full rated temperature range. Specifications in boldface apply over the full rated temperature range. Tested Limits are ensured and 100% tested in production. Design Limits are ensured (but not 100% production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Accuracy is defined as the error between the output voltage and 10 mv/°C times the case temperature of the device, at specified conditions of voltage, current, and temperature (expressed in °C). Nonlinearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the rated temperature range of the device. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be computed by multiplying the internal dissipation by the thermal resistance. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 3 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS(1)(2) (continued) LM35A PARAMETER TEST CONDITIONS VS = 5 V, 25°C Quiescent current (8) 67 105 56.2 LM35CA DESIGN LIMIT (4) 131 68 105.5 TYP TESTED LIMIT (3) 56 67 91 56.2 133 DESIGN LIMIT (4) 114 68 91.5 0.2 4 V ≤ VS ≤ 30 V 0.5 2 0.5 2 +0.39 +0.5 +0.39 +0.5 1 0.2 UNITS (MAX.) µA 116 4 V ≤ VS ≤ 30 V, 25°C 1 µA µA/°C Minimum temperature In circuit of Figure 1, IL = 0 for rate accuracy (8) 56 VS = 30 V, 25°C Temperature coefficient of quiescent current Long term stability TESTED LIMIT (3) VS = 5 V VS = 30 V Change of quiescent current (7) TYP +1.5 TJ = TMAX, for 1000 hours +2 ±0.08 +1.5 +2 ±0.08 °C °C Quiescent current is defined in the circuit of Figure 1. ELECTRICAL CHARACTERISTICS (1) (2) LM35 PARAMETER Accuracy, LM35, LM35C (5) Accuracy, LM35D (5) TEST CONDITIONS TYP TESTED LIMIT (3) TA = 25°C ±0.4 ±1 TA = –10°C ±0.5 TA = TMAX ±0.8 TA = TMIN ±0.8 ±1.5 ±1.5 ±0.8 ±2 Load regulation (7) 0 ≤ IL ≤ 1 mA TA = 25°C ±0.4 ±2 TMIN ≤ TA ≤ TMAX ±0.5 TA = 25°C ±0.01 4 V ≤ VS ≤ 30 V ±0.02 ±0.5 ±0.1 ±1.5 °C ±0.5 °C +10 +9.8, +10.2 mV/°C ±2 ±0.5 ±0.01 ±0.2 °C ±0.2 ±0.4 ±5 UNITS (MAX.) ±2 ±2 +9.8, +10.2 4 ±1.5 ±0.9 +10 (7) ±1.5 ±0.8 ±0.9 ±0.3 (6) ±1 ±0.5 TA = TMIN TMIN ≤ TA ≤ TMAX (5) ±0.4 DESIGN LIMIT (4) TA = TMAX TMIN ≤ TA ≤ TMAX (2) (3) (4) TESTED LIMIT (3) ±0.6 Sensor gain (average slope) (1) TYP TA = 25°C Nonlinearity (6) Line regulation (7) LM35C, LM35D DESIGN LIMIT (4) ±0.02 ±5 ±0.1 ±0.2 mV/mA mV/V Unless otherwise noted, these specifications apply: −55°C ≤ TJ ≤ 150°C for the LM35 and LM35A; −40°C ≤ TJ ≤ 110°C for the LM35C and LM35CA; and 0°C ≤ TJ ≤ 100°C for the LM35D. VS = 5 Vdc and ILOAD = 50 μA, in the circuit of Figure 2. These specifications also apply from +2°C to TMAX in the circuit of Figure 1. Specifications in boldface apply over the full rated temperature range. Specifications in boldface apply over the full rated temperature range. Tested Limits are ensured and 100% tested in production. Design Limits are ensured (but not 100% production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Accuracy is defined as the error between the output voltage and 10 mv/°C times the case temperature of the device, at specified conditions of voltage, current, and temperature (expressed in °C). Nonlinearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the rated temperature range of the device. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be computed by multiplying the internal dissipation by the thermal resistance. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 ELECTRICAL CHARACTERISTICS(1)(2) (continued) LM35 PARAMETER TEST CONDITIONS VS = 5 V, 25°C Quiescent current (8) 80 105 56.2 LM35C, LM35D DESIGN LIMIT (4) 158 82 105.5 TYP TESTED LIMIT (3) 56 80 91 56.2 161 DESIGN LIMIT (4) 138 91.5 0.2 0.5 3 0.5 3 +0.39 +0.7 +0.39 +0.7 0.2 µA 141 4 V ≤ VS ≤ 30 V 2 UNITS (MAX.) 82 4 V ≤ VS ≤ 30 V, 25°C 2 µA µA/°C Minimum temperature In circuit of Figure 1, IL = 0 for rate accuracy (8) (9) 56 VS = 30 V, 25°C Temperature coefficient of quiescent current Long term stability TESTED LIMIT (3) VS = 5 V VS = 30 V Change of quiescent current (9) TYP TJ = TMAX, for 1000 hours +1.5 ±0.08 +2 +1.5 +2 ±0.08 °C °C Quiescent current is defined in the circuit of Figure 1. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be computed by multiplying the internal dissipation by the thermal resistance. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 5 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS THERMAL RESISTANCE JUNCTION TO AIR THERMAL TIME CONSTANT 45 40 TIME CONSTANT (SEC) THERMAL RESISTANCE (C/W) 400 300 200 T0-46 100 35 30 25 20 T0-46 15 10 T0-92 5 T0-92 0 0 0 400 800 1200 1600 0 2000 AIR VELOCITY (FPM) 1600 2000 C002 Figure 4. THERMAL RESPONSE IN STILL AIR THERMAL RESPONSE IN STIRRED OIL BATH 120 PERCENT OF FINAL VALUE (%) PERCENT OF FINAL VALUE (%) 1200 Figure 3. 100 80 60 40 20 0 ±20 100 80 T0-46 60 T0-92 40 20 0 ±20 0 2 4 6 TIME (MINUTES) 8 0 2 4 6 TIME (SEC) C003 8 C004 Figure 5. Figure 6. MINIMUM SUPPLY VOLTAGE vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE (IN CIRCUIT OF Figure 1) 4.4 160 4.2 TYPICAL IOUT = 2.0 mA 4.0 140 QUIESCENT CURRENT (A) SUPPLY VOLTAGE (V) 800 AIR VELOCITY (FPM) 120 3.8 3.6 3.4 TYPICAL IOUT = 1.0 mA 3.2 3.0 TYPICAL IOUT = 0 A or 50 A 2.8 120 100 80 60 40 20 2.6 2.4 0 ±75 ±25 25 75 TEMPERATURE (C) 125 175 C005 Figure 7. 6 400 C001 ±75 ±25 25 75 TEMPERATURE (C) 125 175 C006 Figure 8. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) ACCURACY vs TEMPERATURE (ENSURED) 200 2.0 180 1.5 TEMPERATURE ERROR (C) QUIESCENT CURRENT (A) QUIESCENT CURRENT vs TEMPERATURE (IN CIRCUIT OF Figure 2) 160 140 120 100 80 1.0 0.5 ±0.5 40 ±2.0 25 75 125 175 TEMPERATURE (C) LM35A ±1.0 ±1.5 ±25 LM35A TYPICAL 0.0 60 ±75 LM35 LM35 ±75 25 ±25 Figure 9. 125 175 C008 Figure 10. ACCURACY vs TEMPERATURE (ENSURED) NOISE VOLTAGE 1600 2.5 LM35D 2.0 1400 LM35C 1.5 1200 1.0 Noise (nV/Hz) TEMPERATURE ERROR (C) 75 TEMPERATURE (C) C007 LM35CA 0.5 TYPICAL 0.0 ±0.5 LM35CA 1000 ±1.0 800 600 400 ±1.5 LM35C 200 ±2.0 0 ±2.5 ±75 ±25 25 75 125 10 175 TEMPERATURE (C) 100 1k 10k FREQUENCY (Hz) C009 Figure 11. 100k C010 Figure 12. START-UP RESPONSE VIN (V) 6 4 2 0 0.6 VOUT (V) 0.4 0.2 0 -0.2 -20 -10 0 10 20 30 40 TIME (SEC) 50 60 C011 Figure 13. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 7 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com APPLICATIONS The LM35 is applied easily in the same way as other integrated-circuit temperature sensors. Glue or cement the device to a surface and the temperature should be within about 0.01°C of the surface temperature. This presumes that the ambient air temperature is almost the same as the surface temperature. If the air temperature were much higher or lower than the surface temperature, the actual temperature of the LM35 die would be at an intermediate temperature between the surface temperature and the air temperature, which is especially true for the TO-92 plastic package where the copper leads are the principal thermal path to carry heat into the device, so its temperature might be closer to the air temperature than to the surface temperature. To minimize this problem, ensure that the wiring to the LM35, as it leaves the device, is held at the same temperature as the surface of interest. The easiest way to do this is to cover up these wires with a bead of epoxy which will insure that the leads and wires are all at the same temperature as the surface, and that the temperature of the LM35 die is not affected by the air temperature. The TO-46 metal package can also be soldered to a metal surface or pipe without damage. Of course, in that case the V− terminal of the circuit will be grounded to that metal. Alternatively, mount the LM35 inside a sealedend metal tube, and then dip into a bath or screw into a threaded hole in a tank. As with any IC, the LM35 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 paints or dips are often used to insure that moisture cannot corrode the LM35 or its connections. These devices are sometimes soldered to a small light-weight heat fin to decrease the thermal time constant and speed up the response in slowly-moving air. On the other hand, a small thermal mass may be added to the sensor, to give the steadiest reading despite small deviations in the air temperature. Table 1. Temperature Rise of LM35 Due To Self-heating (Thermal Resistance, θJA) TO, no heat sink TO (1), small heat fin TO-92, no heat sink TO-92 (2), small heat fin SOIC-8, no heat sink SOIC-8 (2), small heat fin TO-220, no heat sink Still air 400°C/W 100°C/W 180°C/W 140°C/W 220°C/W 110°C/W 90°C/W Moving air 100°C/W 40°C/W 90°C/W 70°C/W 105°C/W 90°C/W 26°C/W Still oil 100°C/W 40°C/W 90°C/W 70°C/W Stirred oil 50°C/W 30°C/W 45°C/W 40°C/W (Clamped to metal, Infinite heat sink) (1) (2) 8 (24°C/W) (55°C/W) Wakefield type 201, or 1-in disc of 0.02-in sheet brass, soldered to case, or similar. TO-92 and SOIC-8 packages glued and leads soldered to 1-in square of 1/16-in printed circuit board with 2-oz foil or similar. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 TYPICAL APPLICATIONS HEAVY CAPACITIVE LOAD, WIRING, ETC. + 2k LM35 TO A HIGH-IMPEDANCE LOAD OUT v Figure 14. LM35 with Decoupling from Capacitive Load HEAVY CAPACITIVE LOAD, WIRING, ETC. + OUT LM35 0.01 PF BYPASS OPTONAL TO A HIGH-IMPEDANCE LOAD 75 v 1 PF Figure 15. LM35 with R-C Damper CAPACITIVE LOADS Like most micropower circuits, the LM35 has a limited ability to drive heavy capacitive loads. The LM35 alone is able to drive 50 pf without special precautions. If heavier loads are anticipated, isolating or decoupling the load with a resistor is easy (see Figure 14). Or you can improve the tolerance of capacitance with a series R-C damper from output to ground (see Figure 15). When the LM35 is applied with a 200-Ω load resistor as shown in Figure 16, Figure 17, or Figure 19, the device is relatively immune to wiring capacitance because the capacitance forms a bypass from ground to input and not on the output. However, as with any linear circuit connected to wires in a hostile environment, performance is affected adversely by intense electromagnetic sources such as relays, radio transmitters, motors with arcing brushes, and SCR transients, as the wiring acts as a receiving antenna and the internal junctions act as rectifiers. For best results in such cases, a bypass capacitor from VIN to ground and a series R-C damper, such as 75 Ω, in series with 0.2 or 1 μF from output to ground are often useful. These are shown in Figure 24, Figure 24, and Figure 27. Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 9 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com 5V + 6.8 k 5% VOUT = 10 mV/°C (TAMBIENT = 1 °C) FROM + 2 °C TO + 40 °C 200 1% v + HEAT FINS LM35 OUT TWISTED PAIR 200 1% v Figure 16. Two-Wire Remote Temperature Sensor (Grounded Sensor) 5V + HEAT FINS LM35 v OUT TWISTED PAIR 200 1% VOUT = 10 mV/°C (TAMBIENT = 1 °C) FROM + 2 °C TO + 40 °C 6.8 k 5% OR 10K RHEOSTAT FOR GAIN ADJUST 200 1% Figure 17. Two-Wire Remote Temperature Sensor (Output Referred to Ground) 10 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 +VS LM35 + VOUT v 1N914 18 k 10% Figure 18. Temperature Sensor, Single Supply (−55° to +150°C) 5V + 0.01 PF BYPASS OPTIONAL OUT LM35 TWISTED PAIR 2k 1% 200 1% 2k 1% VOUT = 10 mV/°C (TAMBIENT = 10 °C) FROM t 5 °C TO + 40 °C 200 1% Figure 19. Two-Wire Remote Temperature Sensor (Output Referred to Ground) Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 11 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com + 5 V TO + 30 V 4.7 k 2N2907 IN + OUT OUT LM35 402 1% v 62.5 0.5% OFFSET ADJUST LM317 ADJ 50 Figure 20. 4-To-20 mA Current Source (0°C to 100°C) 12 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 +VS (6 V to 20 V) LM35 45.5 kO 1% 10 kO 1% VOUT = +1 mV/°F 26.4 kO 1% 18 kO LM385-1.2 1 MO 1% Figure 21. Fahrenheit Thermometer 5V LM35 Figure 22. Centigrade Thermometer (Analog Meter) Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 13 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com 9V 1k LM35 100 A, 60 mV FULLSCALE LM3852.5 25.5 k Figure 23. Fahrenheit Thermometer, Expanded Scale Thermometer (50°F to 80°F, for Example Shown) 5V + LM35 3.9 k OUT IN REF ADC08031 1.28 V GND 75 100k FB + CLOCK LM385 + 1 PF SERIAL DATA OUTPUT ENABLE 10 k GND Figure 24. Temperature To Digital Converter (Serial Output) (128°C Full Scale) 14 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 5V + LM35 16 k OUT 8 IN ADC0804 GND 75 INTR 1k + VREF 0.64 V CS RD WR GND + 1 PF PARALLEL DATA OUTPUT 2k Figure 25. Temperature To Digital Converter (Parallel TRI-STATE Outputs for Standard Data Bus to μP Interface.) (128°C Full Scale) Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 15 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com °F 20 k 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 7V + 20 PF 20 LEDs 18 10 10 18 LM3914 1 2 3 4 5 7V + HEAT FINS LM3914 6 7 8 9 1.2 k* 1 2 3 4 5 6 7 8 9 NC 7V VA LM35 OUT VC 200* + 1 PF 1.5 k* VB 499* 499* 1.5 k* 1 k* RC 1k RB 1k RA 1k *=1% or 2% film resistor Trim RB for VB = 3.075 V Trim RC for VC = 1.955 V Trim RA for VA = 0.075 V + 100 mV/°C ×Tambient Example, VA = 2.275 V at 22°C Figure 26. Bar-Graph Temperature Display (Dot Mode) 16 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 6V 6.8 k 1k fOUT 4N28 + 8 100 k 7 LM35 5 LM131 6 GND 3 1 0.01 PF 100 k 1 PF 2 4 12 k 5k 47 0.01 PF FULL SCALE ADJ LOW TEMPCO Figure 27. LM35 With Voltage-To-Frequency Converter And Isolated Output (2°C to 150°C; 20 to 1500 Hz) Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 17 LM35 SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 www.ti.com BLOCK DIAGRAM A1 1.38 VPTAT +VS nR1 Q1 Q2 10E + A2 E VOUT = 10 mV/°C V0 .125 R2 nR1 8.8 mV/°C i 18 Submit Documentation Feedback R2 Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 LM35 www.ti.com SNIS159D – AUGUST 1999 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision C (July 2013) to Revision D Page • Changed W to Ω ................................................................................................................................................................... 1 • Changed W to Ω ................................................................................................................................................................... 3 • Changed W to Ω ................................................................................................................................................................... 9 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM35 19 PACKAGE OPTION ADDENDUM www.ti.com 3-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM35AH ACTIVE TO NDV 3 1000 TBD Call TI Call TI -55 to 150 LM35AH LM35AH/NOPB ACTIVE TO NDV 3 1000 Green (RoHS & no Sb/Br) POST-PLATE Level-1-NA-UNLIM -55 to 150 LM35AH LM35CAH ACTIVE TO NDV 3 1000 TBD Call TI Call TI -40 to 110 LM35CAH LM35CAH/NOPB ACTIVE TO NDV 3 1000 Green (RoHS & no Sb/Br) POST-PLATE Level-1-NA-UNLIM -40 to 110 LM35CAH LM35CAZ/LFT4 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type LM35CAZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type -40 to 110 LM35 CAZ LM35CH ACTIVE TO NDV 3 1000 TBD Call TI Call TI -40 to 110 LM35CH LM35CH/NOPB ACTIVE TO NDV 3 1000 Green (RoHS & no Sb/Br) POST-PLATE Level-1-NA-UNLIM -40 to 110 LM35CH LM35CZ/LFT1 ACTIVE TO-92 LP 3 2000 TBD Call TI Call TI LM35CZ/LFT4 ACTIVE TO-92 LP 3 2000 TBD Call TI Call TI LM35CZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type -40 to 110 LM35 CZ LM35DH ACTIVE TO NDV 3 1000 TBD Call TI Call TI 0 to 70 LM35DH LM35DH/NOPB ACTIVE TO NDV 3 1000 Green (RoHS & no Sb/Br) POST-PLATE Level-1-NA-UNLIM 0 to 70 LM35DH LM35DM NRND SOIC D 8 95 TBD Call TI Call TI 0 to 100 LM35D M LM35DM/NOPB ACTIVE SOIC D 8 95 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM 0 to 100 LM35D M LM35DMX NRND SOIC D 8 2500 TBD Call TI Call TI 0 to 100 LM35D M LM35DMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) SN | CU SN Level-1-260C-UNLIM 0 to 100 LM35D M LM35DT NRND TO-220 NEB 3 45 TBD Call TI Call TI 0 to 100 LM35DT Addendum-Page 1 LM35 CAZ Samples PACKAGE OPTION ADDENDUM www.ti.com 3-Nov-2013 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty LM35DT/NOPB ACTIVE TO-220 NEB 3 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) 45 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM Op Temp (°C) Device Marking (4/5) 0 to 100 LM35DT LM35DZ OBSOLETE TO-92 LP 3 TBD Call TI Call TI LM35DZ/LFT1 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type LM35 DZ LM35DZ/LFT2 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type LM35 DZ LM35DZ/LFT4 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type LM35 DZ LM35DZ/LFT7 ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type LM35 DZ LM35DZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) SN | CU SN N / A for Pkg Type 0 to 100 LM35H ACTIVE TO NDV 3 1000 TBD Call TI Call TI -55 to 150 LM35H LM35H/NOPB ACTIVE TO NDV 3 1000 Green (RoHS & no Sb/Br) POST-PLATE Level-1-NA-UNLIM -55 to 150 LM35H LM35 DZ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 3-Nov-2013 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 17-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM35DMX SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM35DMX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 17-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM35DMX SOIC D 8 2500 367.0 367.0 35.0 LM35DMX/NOPB SOIC D 8 2500 367.0 367.0 35.0 Pack Materials-Page 2 MECHANICAL DATA NDV0003H H03H (Rev F) www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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