NSC LM199AH-20-883, LM199AH-20 Datasheet

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 0.5and 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 beusedinalmost 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 Guaranteed 0.0001%/˚C temperature coefficient n Low dynamic impedance — 0.5 n Initial tolerance on breakdown voltage — 2
%
n Sharp breakdown at 400 µA n Wide operating current — 500 µA to 10 mA n Wide supply range for temperature stabilizer n Guaranteed low noise n Low power for stabilization — 300 mW at 25˚C n Long term stability — 20 ppm n Proven reliability, low-stress packaging in TO-46
integrated-circuit hermetic package, for low hysteresis after thermal cycling. 33 million hours MTBF at T
A
=
+25˚C (T
J
=
+86˚C)
n Certified long term stability available n MIL-STD-883 compliant
Connection Diagrams
Metal Can Package (TO-46)
DS005717-14
Top View
LM199/LM299/LM399 (See Table on fourth page)
NS Package Number H04D
Plastic Package TO-92
DS005717-10
Bottom View
LM3999 (See Table on fourth page)
NS Package Number Z03A
May 1999
LM199/LM299/LM399/LM3999 Precision Reference
© 1999 National Semiconductor Corporation DS005717 www.national.com
Functional Block Diagrams
LM199/LM299/LM399
DS005717-15
LM3999
DS005717-11
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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 40V
LM3999 36V Reverse Breakdown Current 20 mA Forward Current
LM199/LM299/LM399 1 mA
LM3999 −0.1 mA
Reference to Substrate Voltage V
(RS)
(Note 2) 40V
−0.1V
Operating Temperature Range
LM199 −55˚C to +125˚C LM299 −25˚C to +85˚C
LM399/LM3999 −0˚C to +70˚C Storage Temperature Range −55˚C to +150˚C Soldering Information
TO-92 package (10 sec.) +260˚C
TO-46 package (10 sec.) +300˚C
Electrical Characteristics (Notes 3, 6)
Parameter Conditions LM199H/LM299H LM399H Units
Min Typ Max Min Typ Max
Reverse Breakdown Voltage 0.5 mA I
R
10 mA 6.8 6.95 7.1 6.6 6.95 7.3 V
Reverse Breakdown Voltage 0.5 mA I
R
10 mA 6 9 6 12 mV Change with Current Reverse Dynamic Impedance I
R
=
1 mA 0.5 1 0.5 1.5
Reverse Breakdown −55˚CT
A
+85˚C
LM199
0.00003 0.0001
%
/˚C
Temperature Coefficient +85˚CT
A
+125˚C 0.0005 0.0015
%
/˚C
−25˚CT
A
85˚C LM299 0.00003 0.0001
%
/˚C
0˚CT
A
+70˚C LM399 0.00003 0.0002%/˚C RMS Noise 10 Hz f 10 kHz 7 20 7 50 µV Long Term Stability Stabilized, 22˚CT
A
28˚C, 20 20 ppm
1000 Hours, I
R
=
1mA
±
0.1
%
Temperature Stabilizer T
A
=
25˚C, Still Air, V
S
=
30V 8.5 14 8.5 15 mA
Supply Current T
A
=
− 55˚C 22 28 Temperature Stabilizer 9 40 9 40 V Supply Voltage Warm-Up Time to 0.05
%
V
S
=
30V, T
A
=
25˚C 3 3 sec.
Initial Turn-on Current 9V
S
40, T
A
=
+25˚C, (Note 4) 140 200 140 200 mA
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 Conditions LM3999Z Units
Min Typ Max
Reverse Breakdown Voltage 0.6 mA I
R
10 mA 6.6 6.95 7.3 V
Reverse Breakdown Voltage 0.6 mA I
R
10 mA 6 20 mV Change with Current Reverse Dynamic Impedance I
R
=
1 mA 0.6 2.2
Reverse Breakdown 0˚C T
A
70˚C 0.0002 0.0005
%
/˚C Temperature Coefficient RMS Noise 10 Hz f 10 kHz 7 µV Long Term Stability Stabilized, 22˚C T
A
28˚C, 20 ppm
1000 Hours, I
R
=
1mA
±
0.1
%
Temperature Stabilizer T
A
=
25˚C, Still Air, V
S
=
30V 12 18 mA Temperature Stabilizer 36 V Supply Voltage Warm-Up Time to 0.05
%
V
S
=
30V, T
A
=
25˚C 5 sec.
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Electrical Characteristics (Note 3) (Continued)
Parameter Conditions LM3999Z Units
Min Typ Max
Initial Turn-On Current 9 V
S
40, T
A
=
25˚C 140 200 mA
Electrical Characteristics (Notes 3, 6)
Parameter Conditions LM199AH, LM299AH LM399AH Units
Min Typ Max Min Typ Max
Reverse Breakdown Voltage 0.5 mA I
R
10 mA 6.8 6.95 7.1 6.6 6.95 7.3 V
Reverse Breakdown Voltage 0.5 mA I
R
10 mA 6 9 6 12 mV Change with Current Reverse Dynamic Impedance I
R
=
1 mA 0.5 1 0.5 1.5
Reverse Breakdown −55˚CT
A
+85˚C
LM199A
0.00002 0.00005
%
/˚C
Temperature Coefficient +85˚CT
A
+125˚C 0.0005 0.0010
%
/˚C
−25˚CT
A
85˚C LM299A 0.00002 0.00005
%
/˚C
0˚CT
A
+70˚C LM399A 0.00003 0.0001%/˚C RMS Noise 10 Hz f 10 kHz 7 20 7 50 µV Long Term Stability Stabilized, 22˚CT
A
28˚C, 20 20 ppm
1000 Hours, I
R
=
1mA
±
0.1
%
Temperature Stabilizer T
A
=
25˚C, Still Air, V
S
=
30V 8.5 14 8.5 15 mA
Supply Current T
A
=
− 55˚C 22 28 Temperature Stabilizer 9 40 9 40 V Supply Voltage Warm-Up Time to 0.05
%
V
S
=
30V, T
A
=
25˚C 3 3 sec.
Initial Turn-on Current 9V
S
40, T
A
=
+25˚C, (Note 4) 140 200 140 200 mA
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˚CT
A
+125˚C for the LM199; −25˚CTA≤+85˚C for the LM299 and
0˚CT
A
+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 0˚C to +70˚C −25˚C to +85˚C −55˚C to +125˚C NS
Tolerance Package
2
%
LM299AH LM199AH, LM199AH/883 H04D
5
%
LM399H LM299H H04D LM399AH
5
%
LM3999Z Z03A
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,
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.
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