LM299 National Semiconductor, LM299 Datasheet - Page 4

• Manufacturer Part Number: LM299
• Description: Precision Reference
• Manufacturer: National Semiconductor

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Reverse Breakdown Voltage
Reverse Breakdown Voltage
Change with Current
Reverse Dynamic Impedance
Reverse Breakdown
Temperature Coefficient
RMS Noise
Long Term Stability
Temperature Stabilizer
Supply Current
Temperature Stabilizer
Supply Voltage
Warm-Up Time to 0.05%
Initial Turn-on Current
Initial Turn-On Current
Electrical Characteristics
Electrical Characteristics
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 refer-
ence 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
0˚C T
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 de-
termine 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
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
Reference Voltage, which is derived from several groups of
NBS-traceable references such as LM199AH-20’s, 1N827’s,
A
Tolerance
+70˚C for the LM399 and LM3999.
Initial
Parameter
2%
5%
5%
Parameter
LM399H
LM399AH
LM3999Z
0˚C to +70˚C
0.5 mA
0.5 mA
I
−55˚C T
+85˚C T
−25˚C T
0˚C T
10 Hz
Stabilized, 22˚C T
1000 Hours, I
T
T
V
9 V
R
A
A
S
±
= 1 mA
= 25˚C, Still Air, V
9
= − 55˚C
2 ppm, compared to the
= 30V, T
S
A
40, T
V
S
+70˚C
A
A
A
f
I
I
R
R
Conditions
(Notes 3, 6)
(Note 3) (Continued)
+85˚C
+125˚C
85˚C
A
40, T
10 kHz
A
= +25˚C, (Note 4)
R
10 mA
10 mA
= 25˚C
= 1 mA
Conditions
A
LM299AH
LM299H
A
= 25˚C
S
−25˚C to +85˚C
28˚C,
= 30V
±
0.1%
LM199A
LM299A
LM399A
4
Min
and saturated standard cells, so that the deviation of any one
group will not cause false indications. Indeed, this compari-
son process has recently been automated using a specially
prepared computer program which is custom-designed to re-
ject 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 be-
low. This computerized print-out form of each reference’s
stability is shipped with the unit.
6.8
9
LM199AH, LM299AH
0.00002
0.00002
0.0005
LM199AH, LM199AH/883
6.95
Typ
140
A
8.5
0.5
20
22
6
7
3
Min
+125˚C for the LM199; −25˚C T
−55˚C to +125˚C
0.00005
0.00005
0.0010
Max
200
7.1
20
14
28
40
9
1
LM3999Z
Typ
140
Min
6.6
9
0.00003
LM399AH
6.95
A
Typ
140
0.5
8.5
20
6
7
3
+85˚C for the LM299 and
Max
200
0.0001
Max
200
7.3
1.5
12
50
15
40
Package
H04D
H04D
Z03A
NS
Units
mA
Units
%/˚C
%/˚C
%/˚C
%/˚C
ppm
sec.
mV
mA
mA
µV
V
V