LM399A

LM199/LM399 LM199A/LM399A Precision Reference DESCRIPTIO U STABILIZED (TJ ≈ 90°C) TJ = 25°C 4 8 6 REVERSE CURRENT (mA) 10 LM199 TA01b FEATURES ■ ■ ■ ■ ■ ■ ■ 6.95V Shunt Reference Guaranteed 0.5ppm/°C Temperature Coefficient Guaranteed 1Ω Maximum Dynamic Impedance Guaranteed 20µVRMS Maximum Noise Guaranteed Initial Tolerance of 2% Wide Operating Current Range Available in 4-Lead TO-46 Metal Can APPLICATIO S ■ ■ ■ ■ ■ 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. 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. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Precision Voltage Reference for Multimeters Calibration Equipment Voltage Standards Laboratory Measurement Equipment Industrial Monitor/Control Instruments High Accuracy Data Converters TYPICAL APPLICATIO 15V 10V Buffered Reference 9k 0.1% 8 REVERSE VOLTAGE CHANGE (mV) 7 6 5 4 3 2 1 0 0 7.5k 5% LM399H 6.95V 3 20k 0.1% – 4 2 LM199 TA01a + – + 3 1 2 U U Reverse Voltage Change 7 6 10V LT®1001 4 2 LM199399fb 1 LM199/LM399 LM199A/LM399A ABSOLUTE (Note 1) AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW 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 + 1 H 4 – – 2 3 + H PACKAGE 4-LEAD TO-46 METAL CAN INSIDE THERMAL SHIELD ORDER PART NUMBER LM399H LM399AH LM199H LM199AH LM199AH-20 LM399AH-20 LM399AH-50 OBSOLETE Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VZ ΔVZ rZ ΔVZ ΔTemp Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Temperature Coefficient LM199/LM399 CONDITIONS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) LM199/LM199A MIN TYP MAX ● ● LM399/LM399A MIN TYP MAX 6.75 6.95 6 0.5 7.3 12 1.5 UNITS V mV Ω ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C µV 0.5mA ≤ IR ≤ 10mA 0.5mA ≤ IR ≤ 10mA 6.8 6.95 6 0.5 0.3 5 0.2 5 7.1 9 1 1 15 IR = 1mA (Note 6) (10Hz ≤ f ≤ 100Hz) ● –55°C ≤ TA ≤ 85°C 85°C ≤ TA ≤ 125°C 0°C ≤ TA ≤ 70°C –55°C ≤ TA ≤ 85°C 85°C ≤ TA ≤ 125°C 0°C ≤ TA ≤ 70°C 10Hz ≤ f ≤ 10kHz Stabilized, 22°C ≤ TA ≤ 28°C, 1000 Hours, IR = 1mA ±0.1% ● 0.3 0.5 10 0.3 7 8 8.5 22 ● 2 LM199A/LM399A 1 50 en ΔVZ ΔTime IH VH RMS Noise Long-Term Stability 20 (Note 4) 14 28 40 9 7 8 8.5 (Note 4) ppm/√kH 15 40 mA V Seconds 200 mA LM199399fb Temperature Stabilizer Supply Current TA = 25°C, Still Air, VH = 30V TA = –55°C (Note 5) Temperature Stabilizer Supply Voltage Warm-Up Time to ±0.05% VZ Initial Turn-On Current VH = 30V 9V ≤ VH ≤ 40V (Note 5) 9 3 140 200 3 140 2 U W U U WW W LM199/LM399 LM199A/LM399A ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 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. 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 PERFOR A CE CHARACTERISTICS Reverse Characteristics 100 100 10 DYNAMIC IMPEDANCE (Ω) REVERSE CURRENT (mA) OUTPUT (mV) 1 TJ = 25°C 0.1 STABILIZED (TJ ≈ 90°C) 0.01 6.25 6.85 6.45 6.65 REVERSE VOLTAGE (V) 7.05 LM199 G01 Initial Heater Current 250 INITIAL HEATER CURRENT (mA) VH = 40V 80 200 HEATER CURRENT (mA) HEATER CURRENT (mA) 60 120 100 80 60 VH = 20V 40 20 0 85 105 0 VH = 40V 2 4 6 8 10 12 14 16 18 TIME (SECONDS) LM199 G06 150 100 50 0 –55 –35 –15 5 25 45 65 85 105 125 TURN ON TEMPERATURE (°C) LM199 G04 UW Dynamic Impedance 1 Stabilization Time VH = 15V TA = 25°C TA = –55°C –1 0 10 STABILIZED (TJ ≈ 90°C) 1 TJ = 25°C –2 –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 Heater Current 160 140 Heater Current TA = 25°C VH = 10V 40 VH = 20V 20 VH = 40V 0 25 45 65 –55 –35 –15 5 TEMPERATURE (°C) VH = 30V VH = 10V VH = 30V LM199 G05 LM199399fb 3 LM199/LM399 LM199A/LM399A TYPICAL PERFOR A CE CHARACTERISTICS Zener Noise Voltage 200 8 7 6 NOISE (nV/√Hz) 150 VOLTAGE SWING (V) 5 4 3 2 1 0 20 10 0 50 10 100 1k 10k FREQUENCY (Hz) 100k LM199 G07 MAXIMUM SURGE LIMITING RESISTOR (Ω) 100 STABILIZED (TJ ≈ 90°C) TJ = 25°C Long-Term Reference Performance, 44 Units Tested 12 10 NOISE(10µV/DIV) 8 3 SIGMA 6 4 2 0 2 4 6 8 MONTHS 10 12 LM199 G10 DRIFT (ppm) 4 UW Response Time OUTPUT STABILIZED (TJ ≈ 90°C) TJ = 25°C 800 700 600 500 400 300 200 100 0 Limiting Surge Current 7.5k INPUT OUTPUT 25°C (46mA) 5°C (60mA) –15°C (71mA) –35°C (87mA) –55°C (105mA) INPUT 0 100 200 TIME (µs) 300 400 LM199 G08 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 G09 Low Frequency Noise Voltage MEAN 0 50 150 100 TIME (SECONDS) 200 250 LM199 G11 LM199399fb LM199/LM399 LM199A/LM399A FU CTIO AL BLOCK DIAGRA W 3 1 TYPICAL APPLICATIO S Single Supply Operation 9V TO 40V RS + LM399 6.95V – LM199 TA02 15V TO 20V 1% REGULATED 7.5k OUTPUT ADJUST 12k 0.1% 20k 2k 0.1% 100k 2M 2k 3 1µF LM199 TA05 LM199A 6.95V – 4 2 + – U U U + H + – 4 2 – LT199 FD Split Supply Operation 15V 7.5k Negative Heater Supply with Positive Reference 15V 7.5k + LM399 6.95V + LM399 6.95V – – –15V LM199 TA03 –9V TO –33V LM199 TA04 Standard Cell Replacement 1µF 22k 2 7 6 OUTPUT + 3 1 LT1001AC 4 LM199399fb 5 LM199/LM399 LM199A/LM399A TYPICAL APPLICATIO S Portable Calibrator 8.8k 1% 2 SCHE ATIC DIAGRA S Temperature Stabilizer 3 Q2 Q5 Q8 Q1 2k Q7 10pF 11.2k Q3 Q4 4.2Ω 1k 4 LM199 SD01 Q6 Q12 15pF 2k Q13 10k 2k D1 6.3V D2 6.3V Q11 30k 30pF 6 W U + 200k 12V TO 18V – + 7 6 OUTPUT 10V LT1001AC 3 4 5k + LM399 6.95V 3k TRIM 19k 1% – LM199 TA06 W Reference + 50Ω Q10 Q3 6.3V Q14 1k Q15 1 + Q9 Q16 2k 2.6k – LM199 SD02 2 – LM199399fb LM199/LM399 LM199A/LM399A PACKAGE DESCRIPTIO H Package 4-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1341) .209 – .219 (5.309 – 5.563) .178 – .195 (4.521 – 4.953) .500 (12.700) MIN SEATING* PLANE .085 – .105 (2.159 – 2.667) REFERENCE PLANE .016 – .019** (0.406 – 0.483) DIA .050 (1.270) TYP .100 (2.540) TYP PIN 1 .050 (1.270) TYP .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) 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U Thermal Shield* for TO-46, H Package .399 – .409 (10.135 – 10.389) DIA .244 – .234 (5.690 – 5.943) SEATING PLANE .400 (10.160) .016 – .019 (0.406 – 0.483) TYP DIA .100 (2.540) .050 (1.270) * THERMAL SHIELD MATERIAL IS VALOXTM. VALOX IS A TRADEMARK OF GENERAL ELECTRIC .025 (0.635) MAX LM199399fb 7 LM199/LM399 LM199A/LM399A RELATED PARTS PART NUMBER LT1021 LT1389 LT1634 LTZ1000 DESCRIPTION Precision References for Series or Shunt Operation 1.25V, 2.5V, 4V and 5V Nanopower Shunt Reference 1.25 and 2.5V Micropower Shunt Reference 7V Ultra Precision, Stable Shunt Reference COMMENTS Industry Standard Pinout, –40°C to 125°C 800nA, 0.05% Accuracy, 10ppm/°C Drift 0.05%, 10ppm/°C, 10µA Current 0.05ppm/°C, 1.2mVP-P Noise LM199399fb 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● LT 1005 REV B • PRINTED IN USA www.linear.com © LINEAR TECHNOLOGY CORPORATION 1987