
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 3)
Reverse Breakdown Current
30 mA
Forward Current
2 mA
Operating Temperature Range
LM129
55C to +125C
LM329
0C to +70C
Storage Temperature Range
55C to +150C
Soldering Information
TO-92 package: 10 sec.
260C
TO-46 package: 10 sec.
300C
Electrical Characteristics (Note 2)
LM129A, B, C
LM329A, B, C, D
Parameter
Conditions
Units
Min
Typ
Max
Min
Typ
Max
Reverse Breakdown Voltage
T
A = 25C,
0.6 mA
≤ I
R ≤ 15 mA
6.7
6.9
7.2
6.6
6.9
7.25
V
Reverse Breakdown Change
T
A = 25C,
with Current (Note 4)
0.6 mA
≤ I
R ≤ 15 mA
9
14
9
20
mV
Reverse Dynamic Impedance
T
A = 25C, IR = 1 mA
0.6
1
0.8
2
(Note 4)
RMS Noise
T
A = 25C,
10 Hz
≤ F ≤ 10 kHz
7
20
7
100
V
Long Term Stability
T
A = 45C ± 0.1C,
(1000 hours)
I
R =1 mA ± 0.3%
20
ppm
Temperature Coefficient
I
R =1 mA
LM129A, LM329A
6
10
6
10
ppm/C
LM129B, LM329B
15
20
15
20
ppm/C
LM129C, LM329C
30
50
30
50
ppm/C
LM329D
50
100
ppm/C
Change In Reverse Breakdown
1 mA
≤ I
R ≤ 15 mA
1
ppm/C
Temperature Coefficient
Reverse Breakdown Change
1 mA
≤ I
R ≤ 15 mA
12
mV
with Current
Reverse Dynamic Impedance
1 mA
≤ I
R ≤ 15 mA
0.8
1
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: These specifications apply for 55C
≤ TA ≤ +125C for the LM129 and 0C ≤ TA ≤ +70C for the LM329 unless otherwise specified. The maximum junction
temperature for an LM129 is 150C and LM329 is 100C. For operating at elevated temperature, devices in TO-46 package must be derated based on a thermal re-
sistance of 440C/W junction to ambient or 80C/W junction to case. For the TO-92 package, the derating is based on 180C/W junction to ambient with 0.4" leads
from a PC board and 160C/W junction to ambient with 0.125" lead length to a PC board.
Note 3: Refer to RETS129H for LM129 family military specifications.
Note 4: These changes are tested on a pulsed basis with a low duty-cycle. For changes versus temperature, compute in terms of tempco.
LM129/LM329
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