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Part: LM399
Category:
Power Management
-> Voltage References
-> Shunt
Description: LM399 - Precision Reference, Package: TO-46, Pin Nb=4
Company: National Semiconductor Corporation
Datasheet: Download LM399 datasheet File size : 303 kB
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Datasheet text preview:
LM199/LM299/LM399/LM3999 Precision Reference
May 1999
LM199/LM299/LM399/LM3999 Precision Reference
General Description
The LM199 series are precision, temperature-stabilized monolithic zeners offering temperature coefficients a factor of ten better than high quality reference zeners. Constructed on a single monolithic chip is a temperature stabilizer circuit and an active reference zener. The active circuitry reduces the dynamic impedance of the zener to about 0.5 and allows the zener to operate over 0.5 mA to 10 mA current range with essentially no change in voltage or temperature coefficient. Further, a new subsurface zener structure gives low noise and excellent long term stability compared to ordinary monolithic zeners. The package is supplied with a thermal shield to minimize heater power and improve temperature regulation. The LM199 series references are exceptionally easy to use and free of the problems that are often experienced with ordinary zeners. There is virtually no hysteresis in reference voltage with temperature cycling. Also, the LM199 is free of voltage shifts due to stress on the leads. Finally, since the unit is temperature stabilized, warm up time is fast. The LM199 can be used in almost any application in place of ordinary zeners with improved performance. Some ideal applications are analog to digital converters, calibration standards, precision voltage or current sources or precision power supplies. Further in many cases the LM199 can replace references in existing equipment with a minimum of wiring changes. The LM199 series devices are packaged in a standard hermetic TO-46 package inside a thermal shield. The LM199 is rated for operation from -55°C to +125°C while the LM299 is rated for operation from -25°C to +85°C and the LM399 is rated from 0°C to +70°C. The LM3999 is packaged in a standard TO-92 package and is rated from 0°C to +70°C
Features
n n n n n n n n n n Guaranteed 0.0001%/°C temperature coefficient Low dynamic impedance -- 0.5 Initial tolerance on breakdown voltage -- 2% Sharp breakdown at 400 µA Wide operating current -- 500 µA to 10 mA Wide supply range for temperature stabilizer Guaranteed low noise Low power for stabilization -- 300 mW at 25°C Long term stability -- 20 ppm Proven reliability, low-stress packaging in TO-46 integrated-circuit hermetic package, for low hysteresis after thermal cycling. 33 million hours MTBF at TA = +25°C (TJ = +86°C) n Certified long term stability available n MIL-STD-883 compliant
Connection Diagrams
Metal Can Package (TO-46) Plastic Package TO-92
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Top View LM199/LM299/LM399 (See Table on fourth page) NS Package Number H04D
Bottom View LM3999 (See Table on fourth page) NS Package Number Z03A
© 1999 National Semiconductor Corporation
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Functional Block Diagrams
LM199/LM299/LM399 LM3999
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Absolute Maximum Ratings (Note 1)
Specifications for Military/Aerospace products are not contained in this datasheet. Refer to the following Reliability Electrical Test Specifications documents: RETS199X for LM199, RETS199AX for LM199A. Temperature Stabilizer Voltage LM199/LM299/LM399 LM3999 Reverse Breakdown Current Forward Current LM199/LM299/LM399 LM3999 40V 36V 20 mA 1 mA -0.1 mA
Reference to Substrate Voltage V(RS) (Note 2) Operating Temperature Range LM199 LM299 LM399/LM3999 Storage Temperature Range Soldering Information TO-92 package (10 sec.) TO-46 package (10 sec.)
40V -0.1V
-55°C to +125°C -25°C to +85°C -0°C to +70°C -55°C to +150°C +260°C +300°C
Electrical Characteristics (Notes 3, 6)
Parameter Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Reverse Breakdown Temperature Coefficient IR = 1 mA -55°CTA+85°C +85°CTA+125°C -25°CTA85°C 0°CTA+70°C RMS Noise Long Term Stability Temperature Stabilizer Supply Current Temperature Stabilizer Supply Voltage Warm-Up Time to 0.05% Initial Turn-on Current VS = 30V, TA = 25°C 9VS40, TA = +25°C, (Note 4) 3 140 200 3 140 200 sec. mA 10 Hz f 10 kHz Stabilized, 22°CTA28°C, 1000 Hours, IR = 1 mA ± 0.1% TA = 25°C, Still Air, VS = 30V TA = - 55°C 9 LM199 LM299 LM399 7 20 8.5 22 14 28 40 9 40 V 20 0.5 0.00003 0.0005 0.00003 1 0.0001 0.0015 0.0001 0.00003 7 20 8.5 15 0.0002 50 0.5 1.5 %/°C %/°C %/°C %/°C µV ppm mA Conditions 0.5 mA IR 10 mA 0.5 mA IR 10 mA 6.8 LM199H/LM299H Min Typ 6.95 6 Max 7.1 9 Min 6.6 LM399H Typ 6.95 6 Max 7.3 12 V mV Units
Note 1: "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 guarantee specific performance limits.
Electrical Characteristics (Note 3)
Parameter Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Reverse Breakdown Temperature Coefficient RMS Noise Long Term Stability Temperature Stabilizer Temperature Stabilizer Supply Voltage Warm-Up Time to 0.05% VS = 30V, TA = 25°C
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Conditions Min 0.6 mA IR 10 mA 0.6 mA IR 10 mA IR = 1 mA 0°C TA 70°C 10 Hz f 10 kHz Stabilized, 22°C TA 28°C, 1000 Hours, IR = 1 mA ± 0.1% TA = 25°C, Still Air, VS = 30V 6.6
LM3999Z Typ 6.95 6 0.6 0.0002 7 20 12 18 36 5 Max 7.3 20 2.2 0.0005
Units V mV %/°C µV ppm mA V sec.
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Electrical Characteristics (Note 3)
Parameter Initial Turn-On Current
(Continued) LM3999Z Min Typ 140 Max 200 mA Units
Conditions 9 VS 40, TA = 25°C
Electrical Characteristics (Notes 3, 6)
Parameter Reverse Breakdown Voltage Reverse Breakdown Voltage Change with Current Reverse Dynamic Impedance Reverse Breakdown Temperature Coefficient IR = 1 mA -55°CTA+85°C +85°CTA+125°C -25°CTA85°C 0°CTA+70°C RMS Noise Long Term Stability Temperature Stabilizer Supply Current Temperature Stabilizer Supply Voltage Warm-Up Time to 0.05% Initial Turn-on Current VS = 30V, TA = 25°C 9VS40, TA = +25°C, (Note 4) 3 140 200 3 140 200 sec. mA 10 Hz f 10 kHz Stabilized, 22°CTA28°C, 1000 Hours, IR = 1 mA ± 0.1% TA = 25°C, Still Air, VS = 30V TA = - 55°C 9 LM199A LM299A LM399A 7 20 8.5 22 14 28 40 9 40 V 20 0.5 0.00002 0.0005 0.00002 1 0.00005 0.0010 0.00005 0.00003 7 20 8.5 15 0.0001 50 0.5 1.5 %/°C %/°C %/°C %/°C µV ppm mA Conditions 0.5 mA IR 10 mA 0.5 mA IR 10 mA LM199AH, LM299AH Min 6.8 Typ 6.95 6 Max 7.1 9 Min 6.6 LM399AH Typ 6.95 6 Max 7.3 12 V mV Units
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°CTA+125°C for the LM199; -25°CTA+85°C for the LM299 and 0°CTA+70°C for the LM399 and LM3999. Note 4: This initial current can be reduced by adding an appropriate resistor and capacitor to the heater circuit. See the performance characteristic graphs to determine values. Note 5: Do not wash the LM199 with its polysulfone thermal shield in TCE. Note 6: A military RETS electrical test specification is available for the LM199H/883, LM199AH/883, and LM199AH-20/883 on request.
Ordering Information
Initial Tolerance 2% 5% 5% LM399H LM399AH LM3999Z Z03A and saturated standard cells, so that the deviation of any one group will not cause false indications. Indeed, this comparison process has recently been automated using a specially prepared computer program which is custom-designed to reject noisy data (and require a repeat reading) and to record the average of the best 5 of 7 readings, just as a sagacious standards engineer will reject unbelievable readings. The typical characteristic for the LM199AH-20 is shown below. This computerized print-out form of each reference's stability is shipped with the unit. LM299AH LM299H LM199AH, LM199AH/883 0°C to +70°C -25°C to +85°C -55°C to +125°C NS Package H04D H04D
Certified Long Term Drift
The National Semiconductor LM199AH-20, LM299AH-20, and LM399AH-50 are ultra-stable Zener references specially selected from the production runs of LM199AH, LM299AH, LM399AH and tested to confirm a long-term stability of 20, 20, or 50 ppm per 1000 hours, respectively. The devices are measured every 168 hours and the voltage of each device is logged and compared in such a way as to show the deviation from its initial value. Each measurement is taken with a probable-worst-case deviation of ± 2 ppm, compared to the Reference Voltage, which is derived from several groups of NBS-traceable references such as LM199AH-20's, 1N827's,
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Typical Characteristics
National Semiconductor Certified Long Term Drift Hrs 168 336 504 672 840 1008 Drift -20 -24 -36 -34 -40 -36
Testing Conditions Heater Voltage: 30V Zener Current: 1 mA Ambient Temp.: 25°C
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Typical Performance Characteristics
Reverse Characteristics Reverse Voltage Change Dynamic Impedance
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Zener Noise Voltage
Stabilization Time
Heater Current
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