LM199/LM399 LM199A/LM399A Precision Reference Features Description 6.95V Shunt Reference Guaranteed 0.5ppm/°C Temperature Coefficient nn Guaranteed 1Ω Maximum Dynamic Impedance nn Guaranteed 20µV RMS Maximum Noise nn Guaranteed Initial Tolerance of 2% nn Wide Operating Current Range nn Available in 4-Lead TO-46 Metal Can The LM199/LM399 precision shunt reference features excellent temperature stability over a wide range of voltage, temperature and operating current conditions. A stabilizing heater is incorporated with the active Zener on a monolithic substrate which nearly eliminates changes in voltage with temperature. The subsurface Zener operates over a current range of 0.5mA to 10mA, and offers minimal noise and excellent long-term stability. Applications Ideal applications for the LM199/LM399 include digital voltmeters, precision calibration equipment, current sources and a variety of other precision low cost references. A 10V buffered reference application is shown below. nn nn Precision Voltage Reference for Multimeters Calibration Equipment Voltage Standards nn Laboratory Measurement Equipment nn Industrial Monitor/Control Instruments nn High Accuracy Data Converters nn nn L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 10V Buffered Reference 7.5k 5% + 1 3 2 LM399H 6.95V – 3 20k 0.1% 4 8 9k 0.1% – 7 LT®1001 6 + 4 2 LM199 TA01a 10V REVERSE VOLTAGE CHANGE (mV) 15V Reverse Voltage Change 7 6 5 STABILIZED (TJ ≈ 90°C) 4 TJ = 25°C 3 2 1 0 0 2 4 8 6 REVERSE CURRENT (mA) 10 LM199 TA01b 199399fc For more information www.linear.com/LM399 1 LM199/LM399 LM199A/LM399A Absolute Maximum Ratings Pin Configuration (Note 1) Temperature Stabilizer...............................................40V Reverse Breakdown Current....................................20mA Forward Current........................................................1mA Reference to Substrate Voltage, VRS (Note 2)......... –0.1V Operating Temperature Range LM199/LM199A (OBSOLETE)............. –55°C to 125°C LM399/LM399A....................................... 0°C to 70°C Storage Temperature Range LM199/LM199A (OBSOLETE)............. –65°C to 150°C LM399/LM399A................................. –65°C to 150°C Lead Temperature (Soldering, 10 sec).................... 300°C TOP VIEW + 1 4 – 3 + H – 2 H PACKAGE 4-LEAD TO-46 METAL CAN INSIDE THERMAL SHIELD Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LM399H LM399H#TRPBF LM399H 4-Lead TO-46 Metal Can 0°C to 70°C LM399AH LM399AH#TRPBF LM399AH 4-Lead TO-46 Metal Can 0°C to 70°C OBSOLETE PACKAGE LM199H LM199H#TRPBF 4-Lead TO-46 Metal Can –55°C to 125°C LM199AH LM199AH#TRPBF 4-Lead TO-46 Metal Can –55°C to 125°C LM199AH-20 LM199AH-20#TRPBF 4-Lead TO-46 Metal Can –55°C to 125°C LM399AH-20 LM399AH-20#TRPBF 4-Lead TO-46 Metal Can 0°C to 70°C LM399AH-50 LM399AH-50#TRPBF 4-Lead TO-46 Metal Can 0°C to 70°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ ELECTRICAL Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) SYMBOL PARAMETER Reverse Breakdown Voltage VZ l LM199/LM199A MIN TYP MAX 6.8 6.95 7.1 LM399/LM399A MIN TYP MAX 6.75 6.95 7.3 l 6 9 6 12 mV IR = 1mA (Note 6) (10Hz ≤ f ≤ 100Hz) l 0.5 1 0.5 1.5 Ω –55°C ≤ TA ≤ 85°C 85°C ≤ TA ≤ 125°C 0°C ≤ TA ≤ 70°C 0.3 5 1 15 –55°C ≤ TA ≤ 85°C 85°C ≤ TA ≤ 125°C 0°C ≤ TA ≤ 70°C 0.2 5 0.5 10 7 20 CONDITIONS 0.5mA ≤ IR ≤ 10mA ΔVZ Reverse Breakdown Voltage Change 0.5mA ≤ IR ≤ 10mA with Current rZ Reverse Dynamic Impedance ΔVZ ΔTemp Temperature Coefficient LM199/LM399 LM199A/LM399A en RMS Noise 10Hz ≤ f ≤ 10kHz l UNITS V 2 ppm/°C ppm/°C ppm/°C 0.3 1 ppm/°C ppm/°C ppm/°C 7 50 µV 0.3 199399fc 2 For more information www.linear.com/LM399 LM199/LM399 LM199A/LM399A ELECTRICAL Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) SYMBOL PARAMETER Long-Term Stability ΔVZ ΔTime Temperature Stabilizer Supply IH Current LM199/LM199A LM399/LM399A MIN TYP MAX MIN TYP MAX UNITS 8 (Note 4) 8 (Note 4) ppm/√kH CONDITIONS Stabilized, 22°C ≤ TA ≤ 28°C, 1000 Hours, IR = 1mA ±0.1% TA = 25°C, Still Air, VH = 30V TA = –55°C (Note 5) 8.5 22 Temperature Stabilizer Supply Voltage VH l Warm-Up Time to ±0.05% VZ VH = 30V Initial Turn-On Current 9V ≤ VH ≤ 40V (Note 5) 14 28 9 8.5 40 9 3 Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The substrate is electrically connected to the negative terminal of the temperature stabilizer. The voltage that can be applied to either terminal of the reference is 40V more positive or 0.1V more negative than the substrate. 15 mA 40 V 3 140 200 140 Seconds 200 mA Note 3: These specifications apply for 30V applied to the temperature stabilizer and –55°C ≤ TA ≤ 125°C for the LM199; and 0°C ≤ TA ≤ 70°C for the LM399. Note 4: Devices with maximum guaranteed long-term stability of 20ppm/√kH are available. Drift decreases with time. Note 5: This initial current can be reduced by adding an appropriate resistor and capacitor to the heater circuit. See the Typical Performance Characteristics graphs to determine values. Note 6: Guaranteed by “Reverse Breakdown Change with Current.” Typical Performance Characteristics Reverse Characteristics Dynamic Impedance 1 TJ = 25°C 0.01 6.25 STABILIZED (TJ ≈ 90°C) 6.85 6.45 6.65 REVERSE VOLTAGE (V) 7.05 LM199 G01 1 VH = 15V TA = 25°C 0 10 OUTPUT (mV) DYNAMIC IMPEDANCE (Ω) REVERSE CURRENT (mA) 10 0.1 Stabilization Time 100 100 STABILIZED (TJ ≈ 90°C) 1 TA = –55°C –1 –2 TJ = 25°C –3 0.1 10 100 1k 10k FREQUENCY (Hz) 100k LM199 G02 –4 0 4 12 16 8 HEATER ON TIME (SECONDS) 20 LM199 G03 199399fc For more information www.linear.com/LM399 3 LM199/LM399 LM199A/LM399A Typical Performance Characteristics Initial Heater Current Heater Current Heater Current 160 80 VH = 40V 200 150 100 HEATER CURRENT (mA) 60 VH = 10V 40 VH = 20V VH = 30V 20 50 0 –55 –35 –15 5 25 45 65 85 105 125 TURN ON TEMPERATURE (°C) 0 25 45 65 –55 –35 –15 5 TEMPERATURE (°C) LM199 G04 85 105 6 STABILIZED (TJ ≈ 90°C) 5 VOLTAGE SWING (V) STABILIZED (TJ ≈ 90°C) 4 TJ = 25°C 2 7.5k 1 INPUT 0 OUTPUT 20 INPUT 10 0 1k 10k FREQUENCY (Hz) VH = 30V VH = 40V 0 2 4 6 8 10 12 14 16 18 TIME (SECONDS) Limiting Surge Current 3 TJ = 25°C 100 VH = 20V 40 LM199 G06 OUTPUT 7 150 VH = 10V 60 Response Time 8 10 80 0 MAXIMUM SURGE LIMITING RESISTOR (Ω) Zener Noise Voltage 50 100 LM199 G05 200 100 120 20 VH = 40V NOISE (nV/√Hz) TA = 25°C 140 HEATER CURRENT (mA) INITIAL HEATER CURRENT (mA) 250 100k 0 100 200 TIME (µs) 300 LM199 G07 800 700 600 500 400 300 200 100 0 400 25°C (46mA) 5°C (60mA) –15°C (71mA) –35°C (87mA) –55°C (105mA) 0 20 10 30 MINIMUM SUPPLY VOLTAGE (V) 40 HEATER MUST BE BYPASSED WITH A 2µF OR LARGER TANTALUM CAPACITOR IF RESISTORS ARE USED LM199 G08 LM199 G09 Long-Term Reference Performance, 44 Units Tested Low Frequency Noise Voltage 12 NOISE(10µV/DIV) DRIFT (ppm) 10 8 3 SIGMA 6 4 MEAN 2 0 2 4 6 8 MONTHS 10 12 0 LM199 G10 50 150 100 TIME (SECONDS) 200 250 LM199 G11 199399fc 4 For more information www.linear.com/LM399 LM199/LM399 LM199A/LM399A Functional Block Diagram + 3 1 + H – – 4 2 LT199 FD Typical Applications Single Supply Operation Negative Heater Supply with Positive Reference Split Supply Operation 9V TO 40V 15V 15V RS 7.5k + 7.5k + + LM399 LM399 LM399 6.95V 6.95V 6.95V – – LM199 TA02 –9V TO –33V –15V – LM199 TA04 LM199 TA03 Standard Cell Replacement 15V TO 20V 1% REGULATED 1µF 7.5k + – 1 3 4 OUTPUT ADJUST LM199A 12k 0.1% 6.95V 20k 2 2k 0.1% 22k 2 – 2k 3 + 100k 2M 7 LT1001AC 6 OUTPUT 4 1µF LM199 TA05 199399fc For more information www.linear.com/LM399 5 LM199/LM399 LM199A/LM399A Typical Applications Portable Calibrator 8.8k 1% 2 200k + 12V TO 18V 3 7 – LT1001AC + 6 OUTPUT 10V 4 5k + 19k 1% LM399 6.95V 3k TRIM – LM199 TA06 Schematic Diagrams Temperature Stabilizer Reference 3 1 Q9 Q5 Q2 + Q8 Q6 Q1 2k 2k 4.2Ω Q15 Q14 15pF Q7 10pF 1k Q3 6.3V 50Ω Q10 + Q12 2k 30pF Q13 11.2k D1 6.3V Q3 Q4 D2 6.3V Q16 10k 2k Q11 2.6k 30k 1k LM199 SD01 4 – LM199 SD02 2 – 199399fc 6 For more information www.linear.com/LM399 LM199/LM399 LM199A/LM399A Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. H Package 4-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1341) Thermal Shield* for TO-46, H Package .400 – .420 (10.160 – 10.668) DIA .209 – .219 (5.309 – 5.563) .085 – .105 (2.159 – 2.667) .178 – .195 (4.521 – 4.953) REFERENCE PLANE .500 (12.700) MIN .025 (0.635) MAX SEATING* PLANE .016 – .019** (0.406 – 0.483) DIA .050 (1.270) TYP .100 (2.540) TYP .225 – .240 (5.715 – 6.096) SEATING PLANE .450 REF (11.430) .016 – .019 (0.406 – 0.483) TYP DIA .100 (2.540) .050 (1.270) .050 (1.270) TYP PIN 1 *THERMAL SHIELD MATERIAL IS VALOX .036 – .046 (0.914 – 1.168) 45 .028 – .048 (0.711 – 1.219) H4(TO-46) 0801 *LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND .050" BELOW THE REFERENCE PLANE .016 – .024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) Revision History (Revision history begins at Rev C) REV DATE DESCRIPTION C 12/14 Package/Order Information updated PAGE NUMBER 2 Thermal shield dimensions corrected 7 199399fc Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representaFor ofmore information www.linear.com/LM399 tion that the interconnection its circuits as described herein will not infringe on existing patent rights. 7 LM199/LM399 LM199A/LM399A Related Parts PART NUMBER DESCRIPTION COMMENTS LT®1021 Precision References for Series or Shunt Operation Industry Standard Pinout, –40°C to 125°C LT1389 1.25V, 2.5V, 4V and 5V Nanopower Shunt Reference 800nA, 0.05% Accuracy, 10ppm/°C Drift LT1634 1.25 and 2.5V Micropower Shunt Reference 0.05%, 10ppm/°C, 10µA Current LTZ1000 7V Ultra Precision, Stable Shunt Reference 0.05ppm/°C, 1.2mVP-P Noise 199399fc 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LM399 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LM399 LT 1214 REV C • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1987