Original Creation Date: 08/15/95
Last Update Date: 02/24/03
Last Major Revision Date: 08/15/95
MNLM199A-X REV 0CL MICROCIRCUIT DATA SHEET
PRECISION VOLTAGE REFERENCE
General Description
The LM199 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 0.5ohms 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 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 shift 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.
NS Part Numbers
LM199AH-SMD*
LM199AH/883
Industry Part Number
LM199
Prime Die
LM199
Controlling Document
5962-8856101XA*
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
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MICROCIRCUIT DATA SHEET
MNLM199A-X REV 0CL
(Absolute Maximum Ratings)
Temperature Stabilizer Voltage 40V
Reverse Breakdown Current 20 mA
Forward Current 1 mA
Reference to Substrate Voltage
(Note 1) 40V
-0.1V
Operating Temperature Range -55 C to +125 C
Storage Temperature Range -55 C to +125 C
Soldering Information +260 CT0-92 package (10 sec.) +300 CT0-46 Package (10 Sec.)
ESD Tolerance
(Note 2) 3500V
Note 1: The substrate is electrically connected to the negative terminal of te temperature
stabilizer. The voltage that can be applied to either ternimal of the reference is
40 V more positive or 0.1V more than the substrate.
Note 2: Human body model, 1.5k Ohms in series with 100pF
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MNLM199A-X REV 0CL MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Vr Reverse Breakdown
Voltage 0.5mA <= Ir <= 10mA 6.8 7.1 V 1, 2,
3
Delta Vr Reverse Breakdown
Voltage Change
with Current
0.5mA <= Ir <= 10mA 9.0 mV 1, 2,
3
Vnrms Zener Rms Noise
Voltage Ir = 1mA, Vh = 40V, 10Hz<Freq<10KHz 20.0 uV 1
Ihpk Peak Heater
Current Vh = 40V, 1 % Duty Cycle 200 mA 1
Il Leakage Zener to
Substrate Vh = 40V 250 nA 1
Delta
Vz/Delta T Reverse Breakdown
Temperature
Coefficient
Ir = 1mA, -55 C <= TA <= 85 C 3 0.5 ppm/C 1
Ir = 1mA, 85 C <= TA <= 125 C 3 10.0 ppm/C 1
Zr Reverse Dynamic
Impedance Ir = 1mA 1 1 Ohm 1
Ih Stabilized Heater
Current Vh = 30V(tested after 5 seconds of
heater turn on time) 30 mA 1
Vh = 30V (Still air) 2 14 mA 2
285mA3
Vnpk Zener Peak Noise
Voltage Ir = 1mA, Vh = 40V, 10Hz<Freq<10KHz 80 uV 1
Vf Forward Voltage Ir = 1mA -1.6 V 1
Note 1: Guaranteed by "Reverse Breakdown Voltage Change with Current".
Note 2: Guaranteed parameter, not tested.
Note 3: Tested on Auto Drift test oven.
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MICROCIRCUIT DATA SHEET
MNLM199A-X REV 0CL
Revision History
Rev ECN # Rel Date Originator Changes
0CL M0004114 02/24/03 Rose Malone Update MDS: MNLM199A-X, Rev. 0BL to MNLM199A-X, Rev.
0CL. Added ESD Level in Absolute Maximum Ratings
Section.
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