If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 2)
Reverse Current
30mA
Forward Current
10mA
Operating Temperature Range (Note 3)
LM185-1.2
−55°C to +125°C
LM285-1.2
−40°C to +85°C
LM385-1.2
0°C to 70°C
ESD Susceptibility (Note 9)
2kV
Storage Temperature
−55°C to +150°C
Soldering Information
TO-92 package: 10 sec.
260°C
TO-46 package:10 sec.
300°C
SO and SOT Pkg.
Vapor phase (60 sec.)
215°C
Infrared (15 sec.)
220°C
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
Electrical Characteristics
(Note 4)
LM185-1.2
LM185BX-1.2
LM185BY-1.2
LM285-1.2
LM285BX-1.2
LM285BY-1.2
Tested
Design
Limit
Limit
(Notes 5, (Note 6)
8)
LM385B-1.2
LM385BX-1.2
LM385BY-1.2
LM385-1.2
Units
(Limit)
Tested
Limit
(Note 5)
1.205
1.260
Design
Limit
(Note 6)
V(Min)
V(Max)
20
15
1.5
25
μA
(Max)
mV
(Max)
mV
(Max)
Ω
μV
ppm
Parameter
Conditions
Typ
Tested
Limit
(Note 5)
1.223
1.247
Design
Limit
(Note 6)
Reverse Breakdown
Voltage
Minimum Operating
Current
Reverse Breakdown
Voltage Change
with Current
Reverse Dynamic
Impedance
Wideband Noise
(rms)
Long Term Stability
T
A
= 25°C,
10μA
≤
I
R
≤
20mA
1.23
5
8
1.223
1.247
10
1
10
20
1.5
20
15
1
20
20
1.5
25
15
10
1
20
LM385M3-1.2
10μA
≤
I
R
≤
1mA
1mA
≤
I
R
≤
20mA
I
R
= 100μA,
f = 20Hz
I
R
= 100μA,
10Hz
≤
f
≤
10kHz
I
R
= 100μA,
T = 1000 Hr,
T
A
= 25°C ±0.1°C
20
1
60
Average Temperature I
R
= 100μA
Coefficient (Note 7)
X Suffix
Y Suffix
All Others
30
50
150
30
50
150
150
ppm/°C
ppm/°C
ppm/°C
(Max)
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device
is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
The guaranteed specifications apply only for the test conditions listed.
Note 2:
Refer to RETS185H-1.2 for military specifications.
Note 3:
For elevated temperature operation, T
j
max is:
LM185
LM285
LM385
150°C
125°C
100°C
www.national.com
2
LM185-1.2/LM285-1.2/LM385-1.2
Thermal Resistance
θ
JA
(junction to ambient)
θ
JC
(junction to case)
TO-92
180°C/W (0.4″ leads)
170°C/W (0.125″ leads)
N/A
TO-46
440°C/W
80°C/W
SO-8
165°C/W
N/A
SOT23
283°C/W
N/A
Note 4:
Parameters identified with boldface type apply at temperature extremes. All other numbers apply at T
A
= T
J
= 25°C.
Note 5:
Guaranteed and 100% production tested.
Note 6:
Guaranteed, but not 100% production tested. These limits are not used to calculate average outgoing quality levels.
Note 7:
The average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating
T
MAX
and T
MIN
, divided by T
MAX
− T
MIN
. The measured temperatures are −55°C, −40°C, 0°C, 25°C, 70°C, 85°C, 125°C.
Note 8:
A military RETS electrical specification is available on request.
Note 9:
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
