LM299 [NSC]
Precision Reference; 精密基准
| 型号： | LM299 |
| 厂家： | 
National Semiconductor |
| 描述： | Precision Reference |
| 文件： | 总10页 (文件大小：652K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
April 2005
LM199/LM299/LM399
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 0.5Ω 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 tem-
perature regulation.
power supplies. Further in many cases the LM199 can re-
place references in existing equipment with a minimum of
wiring changes.
The LM199 series devices are packaged in a standard her-
metic 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.
Features
n Guaranteed 0.0001%/˚C temperature coefficient
n Low dynamic impedance — 0.5Ω
n Initial tolerance on breakdown voltage — 2%
n Sharp breakdown at 400 µA
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.
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 Proven reliability, low-stress packaging in TO-46
integrated-circuit hermetic package, for low hysteresis
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 stan-
dards, precision voltage or current sources or precision
after thermal cycling. 33 million hours MTBF at TA
+25˚C (TJ = +86˚C)
=
Connection Diagram
Metal Can Package (TO-46)
00571714
Top View
NS Package Number H04D
Ordering Information
Order Number Initial Tolerance Ambient Temperature Package Marking Transport Method NSC Package
LM199AH
LM199AH/883
LM299H
2%
2%
2%
5%
5%
-50˚C to +125˚C
-50˚C to +125˚C
-25˚C to +85˚C
0˚C to +70˚C
LM199AH
LM199AH/Q
LM299H
Box of 500
Tray of 20
Box of 500
Box of 500
Box of 500
H04A
H04A
H04A
H04A
H04A
LM399AH
LM399H
LM399AH
LM399H
0˚C to +70˚C
© 2005 National Semiconductor Corporation
DS005717
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Absolute Maximum Ratings (Note 1)
Reference to Substrate Voltage V(RS) (Note 2)
Operating Temperature Range
40V
−0.1V
Specifications for Military/Aerospace products are not
contained in this datasheet. Refer to the following Reli-
ability Electrical Test Specifications documents:
MNLM199A-X and SMD#5962-88561 .
LM199
−55˚C to +125˚C
−25˚C to +85˚C
−0˚C to +70˚C
LM299
Temperature Stabilizer Voltage
LM399
LM199/LM299/LM399
Reverse Breakdown Current
Forward Current
40V
Storage Temperature Range
Soldering Information
TO-46 package (10 sec.)
−55˚C to +150˚C
20 mA
+300˚C
LM199/LM299/LM399
1 mA
Electrical Characteristics (Notes 3, 6)
Parameter
Conditions
LM299H
LM399H
Units
Min
Typ
6.95
6
Max
7.1
9
Min
Typ
6.95
6
Max
7.3
12
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Change with Current
0.5 mA ≤ IR ≤ 10 mA
0.5 mA ≤ IR ≤ 10 mA
6.8
6.6
V
mV
Reverse Dynamic Impedance
Reverse Btreakdown
IR = 1 mA
0.5
1
0.5
1.5
Ω
−25˚C≤TA≤85˚C
0˚C≤TA≤+70˚C
10 Hz ≤ f ≤ 10 kHz
LM299
LM399
0.00003 0.0001
%/˚C
%/˚C
µV
Temperature Coefficient
0.00003 0.0002
RMS Noise
7
20
7
50
Long Term Stability
Stabilized, 22˚C≤TA≤28˚C,
1000 Hours, IR=1 mA 0.1%
TA=25˚C, Still Air, VS=30V
TA =− 55˚C
20
20
ppm
Temperature Stabilizer
Supply Current
8.5
22
14
28
40
8.5
15
40
mA
V
Temperature Stabilizer
Supply Voltage
9
9
Warm-Up Time to 0.05%
Initial Turn-on Current
VS = 30V, TA = 25˚C
3
3
sec.
mA
9≤VS≤40, TA=+25˚C, (Note 4)
140
200
140
200
Electrical Characteristics (Notes 3, 6)
Parameter
Conditions
LM199AH
LM399AH
Units
Min
Typ
6.95
6
Max
7.1
9
Min
Typ
6.95
6
Max
7.3
12
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Change with Current
0.5 mA ≤ IR ≤ 10 mA
0.5 mA ≤ IR ≤ 10 mA
6.8
6.6
V
mV
Reverse Dynamic Impedance
Reverse Breakdown
IR = 1 mA
0.5
1
0.5
1.5
Ω
−55˚C≤TA≤+85˚C
+85˚C≤TA≤+125˚C
0˚C≤TA≤+70˚C
10 Hz ≤ f ≤ 10 kHz
0.00002 0.00005
%/˚C
%/˚C
LM199A
LM399A
Temperature Coefficient
0.0005
0.0010
0.00003 0.0001 %/˚C
RMS Noise
7
20
7
50
µV
Long Term Stability
Stabilized, 22˚C≤TA≤28˚C,
1000 Hours, IR=1 mA 0.1%
TA=25˚C, Still Air, VS=30V
TA =− 55˚C
20
20
ppm
Temperature Stabilizer
Supply Current
8.5
22
14
28
40
8.5
15
40
mA
V
Temperature Stabilizer
Supply Voltage
9
9
Warm-Up Time to 0.05%
Initial Turn-on Current
VS = 30V, TA = 25˚C
3
3
sec.
mA
9≤VS≤40, TA=+25˚C, (Note 4)
140
200
140
200
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2
Electrical Characteristics (Notes 3, 6) (Continued)
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.
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≤T ≤+125˚C for the LM199; −25˚C≤T ≤+85˚C for the LM299 and
A
A
0˚C≤T ≤+70˚C for the LM399.
A
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 data sheet is available for the LM199AH/833 and LM199AH-SMD (SMD#5962-88561) upon request.
Functional Block Diagram
LM199/LM299/LM399
00571715
3
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Typical Performance Characteristics
Reverse Characteristics
Reverse Voltage Change
00571720
00571719
Dynamic Impedance
Zener Noise Voltage
00571721
00571722
Stabilization Time
Heater Current
00571724
00571723
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4
Typical Performance Characteristics (Continued)
Initial Heater Current
Heater Current (To Limit This Surge, See Next Graph)
00571725
00571726
Heater Surge Limit Resistor vs Minimum Supply Voltage
at Various Minimum Temperatures
Low Frequency Noise Voltage
00571703
00571727
*Heater must be bypassed with a 2 µF or larger tantalum capacitor if
resistors are used.
Response Time
00571707
5
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Typical Applications
Negative Heater Supply with
Positive Reference
Single Supply Operation
00571730
00571728
Buffered Reference
With Single Sypply
Split Supply Operation
00571731
00571729
Positive Current Source
00571732
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6
Typical Applications (Continued)
Standard Cell Replacement
00571733
Negative Current Source
00571734
Portable Calibrator*
Square Wave Voltage Reference
00571735
00571736
*Warm-up time 10 seconds; intermittent operation does not degrade long
term stability.
7
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Typical Applications (Continued)
14V Reference
Precision Clamp*
00571737
00571738
*Clamp will sink 5 mA when input goes more positive than reference
0V to 20V Power Reference
00571739
Bipolar Output Reference
00571740
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8
Schematic Diagrams
Temperature Stabilizer
00571701
Reference
00571713
9
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Physical Dimensions inches (millimeters)
unless otherwise noted
NS Package H04D
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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