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 2)
Reverse Current 30mA
Forward Current 10mA
Operating Temperature Range (Note 3)
LM185 Series −55°C to 125°C
LM285 Series −40°C to 85°C
LM385 Series 0°C to 70°C
ESD Susceptibility (Note 8) 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 Package
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)
Parameter Conditions
LM185, LM285 LM385
Typ
LM185BX,
LM185BY
Typ
LM385BX,
LM185B,
LM285BX,
LM285
LM385BY
LM385
Units
LM285BY
(Limit)
Tested Design Tested Design Tested Design Tested Design
Limit Limit Limit Limit Limit Limit Limit Limit
(Note
5)
(Note
6)
(Note
5)
(Note
6)
(Note
5)
(Note
6)
(Note
5)
(Note
6)
Reference
Voltage
I
R
= 100μA
1.240 1.252 1.265 1.270 1.240 1.252 1.255 1.265 1.270 V
1.255 (max)
1.228 1.215 1.205 1.228 1.215 1.215 1.205 V
1.215 (min)
Reference
Voltage
I
MIN
< I
R
< 1mA 0.2 1 1.5 1 1.5 0.2 1 1.5 1 1.5 mV
Change with
Current
1mA < I
R
< 20mA 4 10 20 10 20 5 15 25 15 25 (max)
Dynamic
Output
I
R
= 100μA,
f =
100Hz
Impedance I
AC
= 0.1 I
R
V
OUT
=
V
REF
0.3 0.4
Ω
V
OUT
=
5.3V
0.7 1
Reference
Voltage
I
R
= 100μA
mV
Change with
Output
1 3 6 3 6 2 5 10 5 10
(max)
Voltage
Feedback
Current
13 20 25 20 25 16 30 35 30 35 nA
(max)
Minimum
Operating
V
OUT
= V
REF
6 9 10 9 10 7 11 13 11 13
μA
Current (see
curve)
V
OUT
= 5.3V 30 45 50 45 50 35 55 60 55 60 (max)
Output
Wideband
I
R
= 100μA, 10Hz < f <
10kHz
Noise V
OUT
= V
REF
50 50
μV
rms
V
OUT
= 5.3V 170 170
3 www.national.com
LM185/LM285/LM385
