Sample & Buy Product Folder Support & Community Tools & Software Technical Documents LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 LMT85/LMT85-Q1 SC70/TO-92, Analog Temperature Sensors with Class-AB Output 1 Features 3 Description • The LMT85/LMT85-Q1 are precision CMOS integrated-circuit temperature sensors with an analog output voltage that is linearly and inversely proportional to temperature. Its features make it suitable for many general temperature sensing applications. It can operate down to 1.8V supply with 5.4 µA power consumption making it ideal for battery powered devices. Package options including throughhole TO-92 package allows the LMT85 to be mounted on-board, off-board, to a heat sink, or on multiple unique locations in the same application. A class-AB output structure gives the LMT85/LMT85Q1 strong output source and sink current capability that can directly drive up to 1.1 nF capacitive loads. This means it is well suited to drive an analog-todigital converter sample-and-hold input with its transient load requirements. It has accuracy specified in the operating range of −50°C to 150°C. The accuracy, 3-lead package options, and other features also make the LMT85/LMT85-Q1 an alternative to thermistors. 1 • • • • • • • • • LMT85-Q1 is AEC-Q100 Grade 0 qualified and is manufactured on an automotive grade flow Very accurate: ±0.4°C typical Wide temperature range of -50°C to 150°C Low 5.4µA quiescent current Sensor gain of -8.2 mV/°C Packages: – Small SC70 (SOT 5-lead) surface mount – Leaded TO-92 Output is short-circuit protected Push-pull output with 50 µA source current capability Footprint compatible with the industry-standard LM20/19 and LM35 temperature sensor Cost-effective alternative to thermistors 2 Applications • • • • • • • • Automotive Industrial White Goods – Appliances Battery Management Disk Drives Games Wireless Transceivers Cell phones For devices with different average sensor gains and comparable accuracy the LMT84/LM84-Q1, LMT86/LMT86-Q1 and LMT87/LMT87-Q1 (For more details see Comparable Alternative Devices.) Device Information (1) PART NUMBER LMT85 LMT85-Q1 (1) PACKAGE BODY SIZE (NOM) SOT (5) 2.00 mm x 1.25 mm TO-92 (3) 4.3 mm x 3.5 mm SOT (5) 2.00 mm x 1.25 mm For all available packages, see the orderable addendum at the end of the data sheet. 4 Full-Range Celsius Temperature Sensor (−50°C to 150°C) VDD (+1.8V to +5.5V) Output Voltage vs Temperature VDD LMT85 CBP OUT GND 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Full-Range Celsius Temperature Sensor (−50°C to 150°C) ................................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 5 5 5 5 6 6 6 7 Absolute Maximum Ratings ..................................... ESD Ratings - Commercial ....................................... ESD Ratings - Automotive ........................................ Recommended Operating Ratings ........................... Thermal Information .................................................. Accuracy Characteristics........................................... Electrical Characteristics .......................................... Typical Characteristics ............................................. 8.2 Functional Block Diagram ......................................... 9 8.3 Feature Description................................................... 9 8.4 Device Functional Modes........................................ 11 9 1 2 4 5 Detailed Description .............................................. 9 8.1 Overview ................................................................... 9 Application and Implementation ........................ 13 9.1 Application Information............................................ 13 9.2 Typical Applications ................................................ 13 10 Power Supply Recommendations ..................... 15 11 Layout................................................................... 15 11.1 Layout Guidelines ................................................. 15 11.2 Layout Example .................................................... 15 12 Device and Documentation Support ................. 17 12.1 12.2 12.3 12.4 12.5 Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 17 17 17 17 17 13 Mechanical, Packaging, and Orderable Information ........................................................... 17 5 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (May 2014) to Revision C Page • Deleted TO-126 package throughout data sheet ................................................................................................................... 1 • Added TO-92 LPM pin configuration graphic ......................................................................................................................... 4 • Changed Handling Ratings to ESD Ratings and moved Storage Temperature to Absolute Maximum Ratings table........... 5 • Changed KV to V ................................................................................................................................................................... 5 • Added TO-92 LP and LPM layout recommendations........................................................................................................... 15 Changes from Revision A (June 2013) to Revision B Page • Changed data sheet flow and layout to conform with new TI standards. Added the following sections: Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, Mechanical, Packaging, and Orderable Information .................................................................................................................................. 1 • Added TO-92 and TO-126 package information throughout document ................................................................................. 1 • Deleted 450 °C/W to 275 °C/W. New specification is derived using TI ' s latest methodology. ........................................... 6 • Changed Temperature Accuracy Conditions from 70°C to 20°C and VDD from 1.9V to 1.8V................................................ 6 • Deleted Note: The input current is leakage only and is highest at high temperature. It is typically only 0.001 µA. The 1 µA limit is solely based on a testing limitation and does not reflect the actual performance of the part............................. 6 2 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 Device Comparison Table (1) ORDER NUMBER PACKAGE (2) BODY SIZE (NOM) Mounting Type LMT85DCK SOT (AKA 5 2.00 mm x 1.25 mm Surface Mount LMT85LP TO-92 (AKA (2): LP) 3 4.3 mm x 3.5 mm Through-hole; straight leads LMT85LPM TO-92 (AKA (2): LPM) 3 4.3 mm x 3.5 mm Through-hole; formed leads 5 2.00 mm x 1.25 mm Surface Mount LMT85DCK-Q1 (1) (2) SOT (AKA : SC70, DCK) PIN (2) : SC70, DCK) For all available packages and complete order numbers, see the orderable addendum at the end of the data sheet. AKA = Also Known As Comparable Alternative Devices PART NUMBER AVERAGE OUTPUT SENSOR GAIN POWER SUPPLY RANGE LMT84/LMT84-Q1 –5.5 mV/°C 1.5V to 5.5V LMT85/LMT85-Q1 –8.2 mV/°C 1.8V to 5.5V LMT86/LMT86-Q1 –10.9 mV/°C 2.2V to 5.5V LMT87/LMT87-Q1 –13.6 mV/°C 2.7V to 5.5V Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 3 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com 6 Pin Configuration and Functions 5-Pin SOT/SC70 DCK Package (Top View) 1 3-Pin TO-92 LPM Package 5 GND VDD 2 LMT85 GND 3 4 OUT VDD 3-Pin TO-92 LP Package VDD OUT GND VDD OUT GND Pin Functions PIN LABEL DCK NUMBER DESCRIPTION LP NUMBER LPC NUMBER TYPE GND 5 Ground VDD 1 Power EQUIVALENT CIRCUIT FUNCTION Power Supply Ground Positive Supply Voltage VDD OUT Analog Output 3 See Pin Diagrams Outputs a voltage which is inversely proportional to temperature See Pin Diagrams GND VDD 4 Power Positive Supply Voltage GND 2 Ground Power Supply Ground, (direct connection to the back side of the die) 4 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 7 Specifications 7.1 Absolute Maximum Ratings (1) (2) MIN MAX Unit Supply Voltage −0.3 6 V Voltage at Output Pin −0.3 (VDD + 0.5) V -7 7 mA Output Current Input Current at any pin (3) -5 Maximum Junction Temperature (TJMAX) Storage temperature Tstg (1) (2) (3) -65 5 mA 150 °C 150 °C Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not specific performance limits. For specifications and test conditions, see the Electrical Characteristics. The specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Soldering process must comply with Texas Instruments Reflow Temperature Profile specifications. Refer to www.ti.com/packaging.. Reflow temperature profiles are different for lead-free and non-lead-free packages. When the input voltage (VI) at any pin exceeds power supplies (VI < GND or VI > V), the current at that pin should be limited to 5 mA. 7.2 ESD Ratings - Commercial VALUE Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins. Applies for TO-92 package LMT85LP. VESD (1) (2) (3) Electrostatic discharge UNIT (1) ±2500 Human Bode Mod (HBM), per JESD22-A114, all pins. Applies for SC70 package LMT85DCK. ±2500 Charged device model (CDM), per JEDEC specification JESD22-C101, all pins. (2) Applies for all parts. ±1000 Machine model ESD stress voltage, per JEDEC specification JESD22A115. (3) Applies for SC70 package LMT85DCK. ±250 V V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. The machine model is a 200pF capacitor discharged directly into each pin. 7.3 ESD Ratings - Automotive VALUE V(ESD) (1) (2) Electrostatic discharge Human-body model (HBM), per JESD22-A114, all pins. (1) Applies for SC70 package LMT85DCK-Q1. ±2500 Charged-device model (CDM), per JEDEC specification JESD22-C101, all pins. (2) Applies for SC70 package LMT85DCK-Q1. ±1000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 7.4 Recommended Operating Ratings MIN Specified temperature VDD Supply voltage Copyright © 2013–2015, Texas Instruments Incorporated MAX TMIN ≤ TA ≤ TMAX °C −50 ≤ TA ≤ +150 1.8 UNIT 5.5 Submit Documentation Feedback °C V 5 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com 7.5 Thermal Information (1) THERMAL METRIC (2) LMT85/ LMT85-Q1 LMT85 DCK LP 5 PIN 3 PIN 275 167 (3) (4) RθJA Junction-to-ambient thermal resistance RθJC(top) Junction-to-case (top) thermal resistance 84 90 RθJB Junction-to-board thermal resistance 56 146 ψJT Junction-to-top characterization parameter 1.2 35 ψJB Junction-to-board characterization parameter 55 146 (1) (2) (3) (4) UNIT °C/W For information on self-heating and thermal response time see section Mounting and Thermal Conductivity. For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. The junction to ambient thermal resistance, RθJA, is specified without a heat sink in still air. Changes in output due to self heating can be computed by multiplying the internal dissipation by the thermal resistance. 7.6 Accuracy Characteristics These limits do not include DC load regulation. These stated accuracy limits are with reference to the values in Table 1. PARAMETER (3) Temperature accuracy MIN (1) TEST CONDITIONS TYP (2) MAX UNIT TA = TJ= 20°C to 150°C; VDD = 1.8 V to 5.5 V -2.7 ±0.4 2.7 °C TA = TJ= 0°C to 150°C; VDD = 1.9 V to 5.5 V -2.7 ±0.7 2.7 °C TA = TJ= 0°C to 150°C; VDD = 2.6 V to 5.5 V ±0.3 TA = TJ= –50°C to 0°C; VDD = 2.3 V to 5.5 V -2.7 °C ±0.7 TA = TJ= –50°C to 0°C; VDD = 2.9 V to 5.5 V (1) (2) (3) (1) 2.7 ±0.25 °C °C Limits are specific to TI's AOQL (Average Outgoing Quality Level). Typicals are at TJ = TA = 25°C and represent most likely parametric norm. Accuracy is defined as the error between the measured and reference output voltages, tabulated in the Transfer Table at the specified conditions of supply gain setting, voltage, and temperature (expressed in °C). Accuracy limits include line regulation within the specified conditions. Accuracy limits do not include load regulation; they assume no DC load. 7.7 Electrical Characteristics Unless otherwise noted, these specifications apply for VDD = +1.8V to +5.5V. MIN and MAX limits apply for TA = TJ = TMIN to TMAX, unless otherwise noted; typical values apply for TA = TJ = 25°C. PARAMETER Average sensor gain (output transfer function slope) Load regulation Line regulation IS CL 6 (1) -30°C and 90°C used to calculate average sensor gain Source ≤ 50 μA, (VDD - VOUT) ≥ 200 mV –1 Sink ≤ 50 μA, VOUT ≥ 200 mV (2) MAX (1) TA = TJ = -50°C to 150°C, (VDD - VOUT) ≥ 100 mV mV/°C –0.22 mV 1 TA = TJ = 25°C 5.4 8.1 μA 5.4 9 μA 1.9 ms +50 µA 0.7 –50 mV μV/V 1100 CL= 0 pF to 1100 pF UNIT –8.2 200 TA = TJ = 30°C to 150°C, (VDD - VOUT) ≥ 100 mV (5) TYP 0.26 Output load capacitance Output drive (5) MIN (4) Supply current Power-on time (1) (2) (3) (4) (3) TEST CONDITIONS pF Limits are specific to TI's AOQL (Average Outgoing Quality Level). Typicals are at TJ = TA = 25°C and represent most likely parametric norm. Source currents are flowing out of the LMT85/LMT85-Q1. Sink currents are flowing into the LMT85/LMT85-Q1. Line regulation (DC) is calculated by subtracting the output voltage at the highest supply voltage from the output voltage at the lowest supply voltage. The typical DC line regulation specification does not include the output voltage shift discussed in Output Voltage Shift. Specified by design and characterization. Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 7.8 Typical Characteristics 4 Minimum Operating Temperature (ƒC) 40 TEMPERATURE ERROR (ºC) 3 2 1 0 -1 -2 -3 -4 -50 -25 0 25 50 75 100 125 150 30 20 10 0 ±10 ±20 ±30 ±40 ±50 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 Supply Voltage (V) TEMPERATURE (ºC) C002 Figure 1. Temperature Error vs Temperature Figure 2. Minimum Operating Temperature vs Supply Voltage Figure 3. Supply Current vs Temperature Figure 4. Supply Current vs Supply Voltage Figure 5. Load Regulation, Sourcing Current Figure 6. Load Regulation, Sinking Current Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Typical Characteristics (continued) Figure 7. Change in Vout vs Overhead Voltage Figure 8. Supply-Noise Gain vs Frequency Figure 9. Output Voltage vs Supply Voltage 8 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 8 Detailed Description 8.1 Overview The LMT85/LMT85-Q1 is an analog output temperature sensor. The temperature sensing element is comprised of a simple base emitter junction that is forward biased by a current source. The temperature sensing element is then buffered by an amplifier and provided to the OUT pin. The amplifier has a simple push-pull output stage thus providing a low impedance output source. 8.2 Functional Block Diagram Full-Range Celsius Temperature Sensor (−50°C to 150°C). VDD OUT Thermal Diodes GND 8.3 Feature Description 8.3.1 LMT85/LMT85-Q1 Transfer Function The output voltage of the LMT85/LMT85-Q1, across the complete operating temperature range, is shown in Table 1. This table is the reference from which the LMT85/LMT85-Q1 accuracy specifications (listed in the Accuracy Characteristics section) are determined. This table can be used, for example, in a host processor lookup table. A file containing this data is available for download at LMT85 product folder under Tools and Software Models. Table 1. LMT85/LMT85-Q1 Transfer Table TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) -50 1955 -10 1648 30 1324 70 991 110 651 -49 1949 -9 1639 31 1316 71 983 111 642 -48 1942 -8 1631 32 1308 72 974 112 634 -47 1935 -7 1623 33 1299 73 966 113 625 -46 1928 -6 1615 34 1291 74 957 114 617 -45 1921 -5 1607 35 1283 75 949 115 608 -44 1915 -4 1599 36 1275 76 941 116 599 -43 1908 -3 1591 37 1267 77 932 117 591 -42 1900 -2 1583 38 1258 78 924 118 582 -41 1892 -1 1575 39 1250 79 915 119 573 -40 1885 0 1567 40 1242 80 907 120 565 -39 1877 1 1559 41 1234 81 898 121 556 -38 1869 2 1551 42 1225 82 890 122 547 -37 1861 3 1543 43 1217 83 881 123 539 -36 1853 4 1535 44 1209 84 873 124 530 -35 1845 5 1527 45 1201 85 865 125 521 -34 1838 6 1519 46 1192 86 856 126 513 -33 1830 7 1511 47 1184 87 848 127 504 Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 9 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Feature Description (continued) Table 1. LMT85/LMT85-Q1 Transfer Table (continued) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) TEMP (°C) VOUT (mV) -32 1822 8 1502 48 1176 88 839 128 495 -31 1814 9 1494 49 1167 89 831 129 487 -30 1806 10 1486 50 1159 90 822 130 478 -29 1798 11 1478 51 1151 91 814 131 469 -28 1790 12 1470 52 1143 92 805 132 460 -27 1783 13 1462 53 1134 93 797 133 452 -26 1775 14 1454 54 1126 94 788 134 443 -25 1767 15 1446 55 1118 95 779 135 434 -24 1759 16 1438 56 1109 96 771 136 425 -23 1751 17 1430 57 1101 97 762 137 416 -22 1743 18 1421 58 1093 98 754 138 408 -21 1735 19 1413 59 1084 99 745 139 399 -20 1727 20 1405 60 1076 100 737 140 390 -19 1719 21 1397 61 1067 101 728 141 381 -18 1711 22 1389 62 1059 102 720 142 372 -17 1703 23 1381 63 1051 103 711 143 363 -16 1695 24 1373 64 1042 104 702 144 354 -15 1687 25 1365 65 1034 105 694 145 346 -14 1679 26 1356 66 1025 106 685 146 337 -13 1671 27 1348 67 1017 107 677 147 328 -12 1663 28 1340 68 1008 108 668 148 319 -11 1656 29 1332 69 1000 109 660 149 310 150 301 Although the LMT85/LMT85-Q1 is very linear, its response does have a slight umbrella parabolic shape. This shape is very accurately reflected in Table 1. The Transfer Table can be calculated by using the parabolic equation. mV mV ª º ª 2º VTEMP mV = 1324.0mV - «8.194 T - 30°C » - «0.00262 2 T - 30°C » °C ¬ ¼ ¬ °C ¼ (1) The parabolic equation is an approximation of the transfer table and the accuracy of the equation degrades slightly at the temperature range extremes. Equation 1 can be solved for T resulting in: T 8 . 194 8 . 194 2 4 u 0 . 00262 u 1324 2 u 0 . 00262 VTEMP mV 30 (2) For an even less accurate linear transfer function approximation, a line can easily be calculated over the desired temperature range using values from the Table and a two-point equation: · ¹ V - V1 = V2 - V1 T2 - T1 · u (T - T1) ¹ (3) Where V is in mV, T is in °C, T1 and V1 are the coordinates of the lowest temperature, T2 and V2 are the coordinates of the highest temperature. For example, if we want to resolve this equation, over a temperature range of 20°C to 50°C, we would proceed as follows: 1159 mV - 1405 mV· u (T - 20oC) 50oC - 20oC ¹ · ¹ V - 1405 mV = o 10 (4) o V - 1405 mV = (-8.20 mV / C) u (T - 20 C) (5) o V = (-8.20 mV / C) u T + 1569 mV (6) Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 Using this method of linear approximation, the transfer function can be approximated for one or more temperature ranges of interest. 8.4 Device Functional Modes 8.4.1 Mounting and Thermal Conductivity The LMT85/LMT85-Q1 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be glued or cemented to a surface. To ensure good thermal conductivity, the backside of the LMT85/LMT85-Q1 die is directly attached to the GND pin (Pin 2 for the SOT/SC70/DCK package). The temperatures of the lands and traces to the other leads of the LMT85/LMT85-Q1 will also affect the temperature reading. Alternatively, the LMT85/LMT85-Q1 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 LMT85/LMT85-Q1 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. If moisture creates a short circuit from the output to ground or VDD, the output from the LMT85/LMT85-Q1 will not be correct. Printed-circuit coatings are often used to ensure that moisture cannot corrode the leads or circuit traces. The thermal resistance junction to ambient (RθJA or θJA) parameter used to calculate the rise of a device junction temperature due to its power dissipation. The equation used to calculate the rise in the LMT85/LMT85-Q1 die temperature is: TJ = TA + TJA ª¬(VDDIS ) + (VDD - VOUT ) IL º¼ (7) where TA is the ambient temperature, IS is the supply current, ILis the load current on the output, and VO is the output voltage. For example, in an application where TA = 30°C, VDD = 5 V, IS = 5.4 μA, VOUT = 1324 mV, and IL = 2 μA, the junction temperature would be 30.014°C, showing a self-heating error of only 0.014°C. Since the LMT85/LMT85-Q1's junction temperature is the actual temperature being measured, care should be taken to minimize the load current that the LMT85/LMT85-Q1 is required to drive. For the thermal resistance of the LMT85/LMT85Q1 in different packages see sectionThermal Information (1). 8.4.2 Output and Noise Considerations A push-pull output gives the LMT85/LMT85-Q1 the ability to sink and source significant current. This is beneficial when, for example, driving dynamic loads like an input stage on an analog-to-digital converter (ADC). In these applications the source current is required to quickly charge the input capacitor of the ADC. The LMT85/LMT85Q1 are ideal for this and other applications which require strong source or sink current. The LMT85/LMT85-Q1's supply-noise gain (the ratio of the AC signal on VOUT to the AC signal on VDD) was measured during bench tests. Its typical attenuation is shown in Figure 8 found in the Typical Characteristics section. A load capacitor on the output can help to filter noise. For operation in very noisy environments, some bypass capacitance should be present on the supply within approximately 5 centimeters of the LMT85/LMT85-Q1. 8.4.3 Capacitive Loads The LMT85/LMT85-Q1 handles capacitive loading well. In an extremely noisy environment, or when driving a switched sampling input on an ADC, it may be necessary to add some filtering to minimize noise coupling. Without any precautions, the LMT85/LMT85-Q1 can drive a capacitive load less than or equal to 1100 pF as shown in Figure 10. For capacitive loads greater than 1100 pF, a series resistor may be required on the output, as shown in Figure 11. (1) For information on self-heating and thermal response time see section Mounting and Thermal Conductivity. Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Device Functional Modes (continued) VDD LMT85 OPTIONAL BYPASS CAPACITANCE OUT GND CLOAD ” 1100 pF Figure 10. LMT85 No Decoupling Required for Capacitive Loads Less Than 1100 pF VDD RS LMT85 OPTIONAL BYPASS CAPACITANCE OUT GND CLOAD > 1100 pF Figure 11. LMT85 with Series Resistor for Capacitive Loading Greater Than 1100 pF CLOAD Minimum RS 1.1 nF to 99 nF 3 kΩ 100 nF to 999 nF 1.5 kΩ 1 μF 800 Ω 8.4.4 Output Voltage Shift The LMT85/LMT85-Q1 are very linear over temperature and supply voltage range. Due to the intrinsic behavior of an NMOS/PMOS rail-to-rail buffer, a slight shift in the output can occur when the supply voltage is ramped over the operating range of the device. The location of the shift is determined by the relative levels of VDD and VOUT. The shift typically occurs when VDD- VOUT = 1 V. This slight shift (a few millivolts) takes place over a wide change (approximately 200 mV) in VDD or VOUT. Since the shift takes place over a wide temperature change of 5°C to 20°C, VOUT is always monotonic. The accuracy specifications in the Accuracy Characteristics table already include this possible shift. 12 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The LMT85/LMT85-Q1 features make it suitable for many general temperature sensing applications. It can operate down to 1.8V supply with 5.4 uA power consumption making it ideal for battery powered devices. Package options including through-hole TO-92 package allows the LMT85 to be mounted on-board, off-board, to a heat sink, or on multiple unique locations in the same application. 9.2 Typical Applications 9.2.1 Connection to an ADC Simplified Input Circuit of SAR Analog-to-Digital Converter Reset +1.8V to +5.5V Input Pin LMT85 VDD CBP RMUX RSS Sample OUT GND CFILTER CMUX CSAMPLE Figure 12. Suggested Connection to a Sampling Analog-to-digital Converter Input Stage 9.2.1.1 Design Requirements Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges the sampling cap, it requires instantaneous charge from the output of the analog source such as the LMT85/LMT85-Q1 temperature sensor and many op amps. This requirement is easily accommodated by the addition of a capacitor (CFILTER). This general ADC application is shown as an example only. 9.2.1.2 Detailed Design Procedure The size of CFILTER depends on the size of the sampling capacitor and the sampling frequency. Since not all ADCs have identical input stages, the charge requirements will vary. Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 13 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Typical Applications (continued) 9.2.1.3 Application Curves Figure 13. Analog Output Transfer Function 9.2.2 Conserving Power Dissipation with Shutdown VDD SHUTDOWN VOUT LMT85 Any logic device output Figure 14. Simple Shutdown Connection of the LMT85 9.2.2.1 Design Requirements Since the power consumption of the LMT85 is less than 9 µA it can simply be powered directly from any logic gate output, thus not requiring a specific shutdown pin. The device can even be powered directly from a micro controller GPIO. In this way it can easily be turned off for cases such as battery powered systems where power savings is critical. 9.2.2.2 Detailed Design Procedure Simply connect the VDD pin of the LMT85 directly to the logic shutdown signal from a microcontroller. 9.2.2.3 Application Curves Time: 500 µsec/div; Top Trace: VDD 1 V/div; Bottom Trace: OUT 1 V/div Figure 15. Output Turn-on Response Time without a Capacitive Load and VDD= 3.3V 14 Submit Documentation Feedback Time: 500 µsec/div; Top trace: VDD 2 V/div; Bottom trace: OUT 1 V/div Figure 16. Output Turn-on Response Time without a Capacitive Load and VDD= 5V Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 Typical Applications (continued) Time: 500 µsec/div; Top trace: VDD 1V/div; Bottom trace: OUT 1 V/div Figure 17. Output Turn-on Response Time with 1.1 nF Capacitive Load and VDD= 3.3V Time: 500 µsec/div; Top trace: VDD 2 V/div; Bottom trace: OUT 1 V/div Figure 18. Output Turn-on Response Time with 1.1 nF Capacitive Load and VDD= 5V 10 Power Supply Recommendations The LMT85's low supply current and supply range of 1.8V to 5.5V allow the device to easily be powered from many sources. Power supply bypassing is optional and is mainly dependent on the noise on the power supply used. In noisy systems it may be necessary to add bypass capacitors to lower the noise that is coupled to the LMT85's output. 11 Layout 11.1 Layout Guidelines The LMT85 is extremely simple to layout. If a power supply bypass capacitor is used it should be connected as shown in the Layout Example. 11.2 Layout Example VIA to ground plane VIA to power plane VDD GND GND OUT 0.01µ F VDD Figure 19. SC70 Package Recommended Layout Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 15 LMT85, LMT85-Q1 SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 www.ti.com Layout Example (continued) GND OUT VDD Figure 20. TO-92 LP Package Recommended Layout GND OUT VDD Figure 21. TO-92 LPM Package Recommended Layout 16 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated LMT85, LMT85-Q1 www.ti.com SNIS168C – MARCH 2013 – REVISED OCTOBER 2015 12 Device and Documentation Support 12.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 2. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LMT85 Click here Click here Click here Click here Click here LMT85-Q1 Click here Click here Click here Click here Click here 12.2 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.3 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.4 Electrostatic Discharge Caution 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. 12.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 17 PACKAGE OPTION ADDENDUM www.ti.com 25-May-2017 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) LMT85DCKR ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -50 to 150 BPA LMT85DCKT ACTIVE SC70 DCK 5 250 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -50 to 150 BPA LMT85LP ACTIVE TO-92 LP 3 1800 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type -50 to 150 LMT85 LMT85LPG PREVIEW TO-92 LPG 3 1000 TBD Call TI Call TI -50 to 150 LMT85LPGM PREVIEW TO-92 LPG 3 3000 TBD Call TI Call TI -50 to 150 LMT85LPM ACTIVE TO-92 LP 3 2000 Green (RoHS & no Sb/Br) CU SN N / A for Pkg Type -50 to 150 LMT85 LMT85QDCKRQ1 ACTIVE SC70 DCK 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -50 to 150 BRA LMT85QDCKTQ1 ACTIVE SC70 DCK 5 250 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -50 to 150 BRA (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (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. (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. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 25-May-2017 (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. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF LMT85, LMT85-Q1 : • Catalog: LMT85 • Automotive: LMT85-Q1 NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product • Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 13-Aug-2015 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMT85DCKR SC70 DCK 5 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMT85DCKT SC70 DCK 5 250 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMT85QDCKRQ1 SC70 DCK 5 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 LMT85QDCKTQ1 SC70 DCK 5 250 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 13-Aug-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMT85DCKR SC70 DCK 5 3000 210.0 185.0 35.0 LMT85DCKT SC70 DCK 5 250 210.0 185.0 35.0 LMT85QDCKRQ1 SC70 DCK 5 3000 210.0 185.0 35.0 LMT85QDCKTQ1 SC70 DCK 5 250 210.0 185.0 35.0 Pack Materials-Page 2 PACKAGE OUTLINE LPG0003A TO-92 - 5.05 mm max height SCALE 1.300 TO-92 4.1 3.9 3.25 3.05 3X 0.55 0.40 5.05 MAX 3 1 3X (0.8) 3X 15.5 15.1 3X 0.48 0.35 3X 2X 1.27 0.05 0.51 0.36 2.64 2.44 2.68 2.28 1.62 1.42 2X (45 ) 1 (0.5425) 2 3 0.86 0.66 4221343/B 09/2016 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. www.ti.com EXAMPLE BOARD LAYOUT LPG0003A TO-92 - 5.05 mm max height TO-92 0.05 MAX ALL AROUND TYP FULL R TYP METAL TYP (1.07) 3X ( 0.75) VIA 2X METAL (1.7) 2X (1.7) 2 1 2X SOLDER MASK OPENING 3 2X (1.07) (R0.05) TYP (1.27) SOLDER MASK OPENING (2.54) LAND PATTERN EXAMPLE NON-SOLDER MASK DEFINED SCALE:20X 4221343/B 09/2016 www.ti.com PACKAGE OUTLINE LP0003A TO-92 - 5.34 mm max height SCALE 1.200 SCALE 1.200 TO-92 5.21 4.44 EJECTOR PIN OPTIONAL 5.34 4.32 (1.5) TYP SEATING PLANE (2.54) NOTE 3 2X 4 MAX (0.51) TYP 6X 0.076 MAX SEATING PLANE 2X 2.6 0.2 3X 12.7 MIN 3X 3X 0.55 0.38 0.43 0.35 2X 1.27 0.13 FORMED LEAD OPTION STRAIGHT LEAD OPTION OTHER DIMENSIONS IDENTICAL TO STRAIGHT LEAD OPTION 3X 2.67 2.03 4.19 3.17 3 2 1 3.43 MIN 4215214/B 04/2017 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. Lead dimensions are not controlled within this area. 4. Reference JEDEC TO-226, variation AA. 5. Shipping method: a. Straight lead option available in bulk pack only. b. Formed lead option available in tape and reel or ammo pack. c. Specific products can be offered in limited combinations of shipping medium and lead options. d. Consult product folder for more information on available options. www.ti.com EXAMPLE BOARD LAYOUT LP0003A TO-92 - 5.34 mm max height TO-92 0.05 MAX ALL AROUND TYP FULL R TYP METAL TYP (1.07) 3X ( 0.85) HOLE 2X METAL (1.5) 2X (1.5) 2 1 (R0.05) TYP 3 2X (1.07) (1.27) SOLDER MASK OPENING 2X SOLDER MASK OPENING (2.54) LAND PATTERN EXAMPLE STRAIGHT LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 0.05 MAX ALL AROUND TYP ( 1.4) 2X ( 1.4) METAL 3X ( 0.9) HOLE METAL (R0.05) TYP 2 1 (2.6) SOLDER MASK OPENING 3 2X SOLDER MASK OPENING (5.2) LAND PATTERN EXAMPLE FORMED LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 4215214/B 04/2017 www.ti.com TAPE SPECIFICATIONS LP0003A TO-92 - 5.34 mm max height TO-92 13.7 11.7 32 23 (2.5) TYP 0.5 MIN 16.5 15.5 11.0 8.5 9.75 8.50 19.0 17.5 6.75 5.95 2.9 TYP 2.4 3.7-4.3 TYP 13.0 12.4 FOR FORMED LEAD OPTION PACKAGE 4215214/B 04/2017 www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated (TI) reserves 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. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. TI’s published terms of sale for semiconductor products (http://www.ti.com/sc/docs/stdterms.htm) apply to the sale of packaged integrated circuit products that TI has qualified and released to market. Additional terms may apply to the use or sale of other types of TI products and services. Reproduction of significant portions of TI information in TI data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such reproduced documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Buyers and others who are developing systems that incorporate TI products (collectively, “Designers”) understand and agree that Designers remain responsible for using their independent analysis, evaluation and judgment in designing their applications and that Designers have full and exclusive responsibility to assure the safety of Designers' applications and compliance of their applications (and of all TI products used in or for Designers’ applications) with all applicable regulations, laws and other applicable requirements. Designer represents that, with respect to their applications, Designer has all the necessary expertise to create and implement safeguards that (1) anticipate dangerous consequences of failures, (2) monitor failures and their consequences, and (3) lessen the likelihood of failures that might cause harm and take appropriate actions. Designer agrees that prior to using or distributing any applications that include TI products, Designer will thoroughly test such applications and the functionality of such TI products as used in such applications. TI’s provision of technical, application or other design advice, quality characterization, reliability data or other services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products; by downloading, accessing or using TI Resources in any way, Designer (individually or, if Designer is acting on behalf of a company, Designer’s company) agrees to use any particular TI Resource solely for this purpose and subject to the terms of this Notice. TI’s provision of TI Resources does not expand or otherwise alter TI’s applicable published warranties or warranty disclaimers for TI products, and no additional obligations or liabilities arise from TI providing such TI Resources. TI reserves the right to make corrections, enhancements, improvements and other changes to its TI Resources. TI has not conducted any testing other than that specifically described in the published documentation for a particular TI Resource. Designer is authorized to use, copy and modify any individual TI Resource only in connection with the development of applications that include the TI product(s) identified in such TI Resource. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN, including but not limited to any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information regarding or referencing third-party products or services does not constitute a license to use such products or services, or a warranty or endorsement thereof. Use of TI Resources may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. TI RESOURCES ARE PROVIDED “AS IS” AND WITH ALL FAULTS. TI DISCLAIMS ALL OTHER WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, REGARDING RESOURCES OR USE THEREOF, INCLUDING BUT NOT LIMITED TO ACCURACY OR COMPLETENESS, TITLE, ANY EPIDEMIC FAILURE WARRANTY AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. TI SHALL NOT BE LIABLE FOR AND SHALL NOT DEFEND OR INDEMNIFY DESIGNER AGAINST ANY CLAIM, INCLUDING BUT NOT LIMITED TO ANY INFRINGEMENT CLAIM THAT RELATES TO OR IS BASED ON ANY COMBINATION OF PRODUCTS EVEN IF DESCRIBED IN TI RESOURCES OR OTHERWISE. IN NO EVENT SHALL TI BE LIABLE FOR ANY ACTUAL, DIRECT, SPECIAL, COLLATERAL, INDIRECT, PUNITIVE, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF TI RESOURCES OR USE THEREOF, AND REGARDLESS OF WHETHER TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Unless TI has explicitly designated an individual product as meeting the requirements of a particular industry standard (e.g., ISO/TS 16949 and ISO 26262), TI is not responsible for any failure to meet such industry standard requirements. Where TI specifically promotes products as facilitating functional safety or as compliant with industry functional safety standards, such products are intended to help enable customers to design and create their own applications that meet applicable functional safety standards and requirements. Using products in an application does not by itself establish any safety features in the application. Designers must ensure compliance with safety-related requirements and standards applicable to their applications. Designer may not use any TI products in life-critical medical equipment unless authorized officers of the parties have executed a special contract specifically governing such use. Life-critical medical equipment is medical equipment where failure of such equipment would cause serious bodily injury or death (e.g., life support, pacemakers, defibrillators, heart pumps, neurostimulators, and implantables). Such equipment includes, without limitation, all medical devices identified by the U.S. Food and Drug Administration as Class III devices and equivalent classifications outside the U.S. TI may expressly designate certain products as completing a particular qualification (e.g., Q100, Military Grade, or Enhanced Product). Designers agree that it has the necessary expertise to select the product with the appropriate qualification designation for their applications and that proper product selection is at Designers’ own risk. Designers are solely responsible for compliance with all legal and regulatory requirements in connection with such selection. Designer will fully indemnify TI and its representatives against any damages, costs, losses, and/or liabilities arising out of Designer’s noncompliance with the terms and provisions of this Notice. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2017, Texas Instruments Incorporated