LM199/LM399/LM199A/LM399A - Precision Reference

1 LM199/LM399 LM199A/LM399A1199399fcFor more information applicaTion FeaTuresDescripTionPrecision ReferenceThe LM199/LM399 Precision shunt Reference features excellent temperature stability over a wide range of volt-age, 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 to 10mA, and offers minimal noise and excellent long-term applications for the LM199/LM399 include digital volt-meters, Precision calibration equipment, current sources and a variety of other Precision low cost references. A 10V buffered Reference application is shown Buffered ReferenceReverse Voltage ChangeapplicaTionsL, LT, LT C, LT M, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation.

2 All other trademarks are the property of their respective owners. nPrecision Voltage Reference for Multimeters nCalibration Equipment Voltage Standards nLaboratory Measurement Equipment nIndustrial Monitor/Control Instruments nHigh Accuracy Data Converters Shunt Reference nGuaranteed C Temperature Coefficient nGuaranteed 1 Maximum Dynamic Impedance nGuaranteed 20 VRMS Maximum Noise nGuaranteed Initial Tolerance of 2% nWide Operating Current Range nAvailable in 4-Lead TO-46 Metal + TA01a +LT 1001 REVERSE CURRENT (mA)0 REVERSE VOLTAGE CHANGE (mV)345610LM199 TA01b210248678 STABILIZED(TJ 90 C)TJ = 25 CLM199/LM399 LM199A/LM399A2199399fcFor more information conFiguraTionabsoluTe MaxiMuM raTingsTOP VIEW+1H PACKAGE4-LEAD TO-46 METAL CANINSIDE THERMAL SHIELD 42 3+HorDer inForMaTionLEAD FREE FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGELM399 HLM399H#TRPBFLM399H4-Lead TO-46 Metal Can0 C to 70 CLM399 AHLM399AH#TRPBFLM399AH4-Lead TO-46 Metal Can0 C to 70 COBSOLETE PACKAGELM199 HLM199H#TRPBF4-Lead TO-46 Metal Can 55 C to 125 CLM199 AHLM199AH#TRPBF4-Lead TO-46 Metal Can 55 C to 125 CLM199AH-20LM199AH-20#TRPBF4-Lead TO-46 Metal Can 55 C to 125 CLM399AH-20LM399AH-20#TRPBF4-Lead TO-46 Metal Can0 C to 70 CLM399AH-50LM399AH-50#TRPBF4-Lead TO-46 Metal Can0 C to 70 CConsult LT C Marketing for parts specified with wider operating temperature ranges.

3 Consult LT C Marketing for information on nonstandard lead based finish more information on lead free part marking, go to: For more information on tape and reel specifications, go to: TYP MAXMIN TYP MAXUNITSVZR everse Breakdown IR VZReverse Breakdown Voltage Change with IR 10mAl69612mVrZReverse Dynamic ImpedanceIR = 1mA (Note 6) (10Hz f 100Hz) VZ TempTemperature Coefficient LM199/LM399 55 C TA 85 C 85 C TA 125 C 0 C TA 70 C 5 1 15 2 ppm/ C ppm/ C ppm/ C LM199A/LM399A 55 C TA 85 C 85 C TA 125 C 0 C TA 70 10 1ppm/ C ppm/ C ppm/ CenRMS Noise10Hz f 10kHzl720750 VelecTrical characTerisTicsTemper atur e Stabilizer ..40 VReverse Breakdown Current ..20mAForward Current ..1mAReference to Substrate Voltage, VRS (Note 2) .. Temper atur e Range LM199/LM199A (OBSOLETE).

4 55 C to 125 C LM399/LM399A ..0 C to 70 CStorage Temper atur e Range LM199/LM199A (OBSOLETE) .. 65 C to 150 C LM399/LM399A .. 65 C to 150 CLead Temper atur e (Soldering, 10 sec) ..300 C(Note 1) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. (Note 3)LM199/LM399 LM199A/LM399A3199399fcFor more information 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 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 more negative than the 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 4: Devices with maximum guaranteed long-term stability of 20ppm/ kH are available.

5 Drift decreases with 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 6: Guaranteed by Reverse Breakdown Change with Current. elecTrical characTerisTicsTypical perForMance characTerisTicsLM199/LM199 ALM399/LM399 ASYMBOLPARAMETERCONDITIONSMIN TYP MAXMIN TYP MAXUNITS VZ TimeLong-Term StabilityStabilized, 22 C TA 28 C, 1000 Hours, IR = 1mA (Note 4)8(Note 4) ppm/ kHIHT emperature Stabilizer Supply CurrentTA = 25 C, Still Air, VH = 30V TA = 55 C (Note 5) 2214 Temperature Stabilizer Supply Voltage l940940 VWarm-Up Time to VZVH = 30V33 SecondsInitial Turn-On Current9V VH 40V (Note 5)140200140200 mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C.

6 (Note 3)Reverse CharacteristicsDynamic ImpedanceStabilization TimeREVERSE VOLTAGE (V) CURRENT (mA) = 25 CSTABILIZED(TJ 90 C)FREQUENCY (Hz) IMPEDANCE ( )101001001k10k100kLM199 G021TJ = 25 CSTABILIZED(TJ 90 C)HEATER ON TIME (SECONDS)0 OUTPUT (mV) 10116LM199 G03 2 3 4481220TA = 25 CVH = 15 VTA = 55 CLM199/LM399 LM199A/LM399A4199399fcFor more information perForMance characTerisTicsZener Noise VoltageResponse TimeLimiting Surge CurrentFREQUENCY (Hz)10501001502001001k10k100kLM199 G07 NOISE (nV/ Hz)TJ = 25 CSTABILIZED(TJ 90 C)TIME ( s)0 VOLTAGE SWING (V)2468400LM199 G080101357200100200300TJ = 25 COUTPUTINPUTSTABILIZED(TJ 90 C) SUPPLY VOLTAGE (V)0 MAXIMUM SURGE LIMITING RESISTOR ( )40060040LM199 G09200010203080025 C (46mA)5 C (60mA) 15 C (71mA) 35 C (87mA) 55 C (105mA)300500100700 HEATER MUST BE BYPASSED WITH A 2 F OR LARGER TANTALUM CAPACITOR IF RESISTORS ARE USEDLong-Term Reference Performance, 44 Units TestedLow Frequency Noise VoltageMONTHS20 DRIFT (ppm)2468101246810 LM199 G10123 SIGMAMEANTIME (SECONDS)0 NOISE(10 V/DIV)200LM199 G1150100150250 Initial Heater CurrentHeater CurrentHeater CurrentTURN ON TEMPERATURE ( C) 550 INITIAL HEATER CURRENT (mA)50150200250 152545125LM199 G04100 3556585105VH = 40 VTEMPERATURE ( C) 55 HEATER CURRENT (mA)4060105LM199 G05200 152565 355458580VH = 10 VVH = 20 VVH = 40 VVH = 30 VTIME (SECONDS)0 HEATER CURRENT (mA)

7 16014012010080604020016LM199 G064812 14261018VH = 10 VVH = 20 VTA = 25 CVH = 30 VVH = 40 VLM199/LM399 LM199A/LM399A5199399fcFor more information block DiagraMTypical applicaTions2413H+ + LT199 FDSingle Supply OperationRS+ TA029V TO 40 VLM399 Split Supply + TA0315V 15 VLM399 Negative Heater Supply with Positive + TA0415V 9V TO 33 VLM399 Standard Cell F1 + TO 20V1% REGULATEDLM199 ALM199 TA05 +LT1001AC100kLM199/LM399 LM199A/LM399A6199399fcFor more information applicaTionsscheMaTic DiagraMsPortable + TO18 VLM199 TA06LM399+ +LT1001 ACTemperature Q6Q2Q1Q9Q8+ Q7Q4LM199 + LM199 SD021230pFLM199/LM399 LM199A/LM399A7199399fcFor more information hisToryREVDATEDESCRIPTIONPAGE NUMBERC12/14 Package/Order Information updatedThermal shield dimensions corrected27(Revision history begins at Rev C)Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

8 However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent DescripTionPlease refer to for the most recent package .420( ) .019( )TYP ( ).225 .240( ).450( ).050( )SEATINGPLANEREF .016 .019**( ) ( ) .105( ).500 ( ) .195( ).209 .219( ) .100( )TYP45H4(TO-46) ( ) ( ) .048( ).036 .046( )SEATING* PLANELEAD DIAMETER IS UNCONTROLLED BETWEEN THE Reference PLANE AND .050" BELOW THE Reference PLANEFOR SOLDER DIP LEAD FINISH, LEAD DIAMETER .024( )**PIN 1H Package4-Lead TO-46 Metal Can( Reference LT C DWG # 05-08-1341)Thermal Shield* for TO-46, H Package*THERMAL SHIELD MATERIAL IS VALOXLM199/LM399 LM199A/LM399A8199399fcFor more information LINEAR TECHNOLOGY CORPORATION 1987LT 1214 REV C PRINTED IN USAL inear Technology Corporation1630 McCarthy Blvd.

9 , Milpitas, CA 95035-7417(408) 432-1900 FAX: (408) 434-0507 parTsPART NUMBERDESCRIPTIONCOMMENTSLT 1021 Precision References for Series or Shunt OperationIndustry Standard Pinout, 40 C to 125 , , 4V and 5V Nanopower Shunt Reference800nA, Accuracy, 10ppm/ C and Micropower Shunt , 10ppm/ C, 10 A CurrentLT Z10007V Ultra Precision , Stable Shunt C, Nois