NSC LM336MX-2.5, LM336M-2.5, LM336-2.5CMWC, LM336BZ-2.5, LM336BMX-2.5 Datasheet
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LM136-2.5/LM236-2.5/LM336-2.5V
Reference Diode
General Description
The LM136-2.5/LM236-2.5 and LM336-2.5 integrated circuits are precision 2.5V shunt regulator diodes. These
monolithic IC voltage references operate as a
low-temperature-coefficient 2.5V zener with 0.2Ω dynamic
impedance. A third terminal onthe LM136-2.5 allowsthe reference voltage and temperature coefficient to be trimmed
easily.
The LM136-2.5 series is useful as a precision 2.5V low voltage reference for digital voltmeters, power supplies or op
amp circuitry. The 2.5V make it convenient toobtain a stable
reference from 5V logic supplies. Further, since the
LM136-2.5 operates as a shunt regulator, it can be used as
either a positive or negative voltage reference.
The LM136-2.5 is rated for operation over −55˚C to +125˚C
while the LM236-2.5 is rated over a −25˚C to +85˚C temperature range.
The LM336-2.5 is rated for operation over a 0˚C to +70˚C
temperature range. See the connection diagrams for available packages.
Features
n Low temperature coefficient
n Wide operating current of 400 µAto 10 mA
n 0.2Ω dynamic impedance
n
±
1%initial tolerance available
n Guaranteed temperature stability
n Easily trimmed for minimum temperature drift
n Fast turn-on
n Three lead transistor package
Connection Diagrams
TO-92
Plastic Package
DS005715-8
Bottom View
Order Number LM236Z-2.5,
LM236AZ-2.5, LM336Z-2.5 or LM336BZ-2.5
See NS Package Number Z03A
TO-46
Metal Can Package
DS005715-20
Bottom View
Order Number LM136H-2.5,
LM136H-2.5/883, LM236H-2.5,
LM136AH-2.5, LM136AH-2.5/883
or LM236AH-2.5
See NS Package Number H03H
May 1998
LM136-2.5/LM236-2.5/LM336-2.5V Reference Diode
© 1999 National Semiconductor Corporation DS005715 www.national.com
Connection Diagrams (Continued)
Typical Applications
SO Package
DS005715-12
Top View
Order Number LM236M-2.5,
LM236AM-2.5, LM336M-2.5
or LM336BM-2.5
See NS Package Number M08A
2.5V Reference
DS005715-9
2.5V Reference with Minimum
Temperature Coefficient
DS005715-10
†
Adjust to 2.490V
*
Any silicon signal diode
Wide Input Range Reference
DS005715-11
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National SemiconductorSales Office/
Distributors for availability and specifications.
Reverse Current 15 mA
Forward Current 10 mA
Storage Temperature −60˚C to +150˚C
Operating Temperature Range (Note 2)
LM136 −55˚C to +150˚C
LM236 −25˚C to +85˚C
LM336 0˚C to +70˚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” (Appendix D) for other methods of
soldering surface mount devices.
Electrical Characteristics (Note 3)
LM136A-2.5/LM236A-2.5 LM336B-2.5
Parameter Conditions LM136-2.5/LM236-2.5 LM336-2.5 Units
Min Typ Max Min Typ Max
Reverse Breakdown Voltage T
A
=
25˚C, I
R
=
1mA
LM136, LM236, LM336 2.440 2.490 2.540 2.390 2.490 2.590 V
LM136A, LM236A, LM336B 2.465 2.490 2.515 2.440 2.490 2.540 V
Reverse Breakdown Change T
A
=
25˚C, 2.6 6 2.6 10 mV
With Current 400 µA≤I
R
≤10 mA
Reverse Dynamic Impedance T
A
=
25˚C, I
R
=
1 mA, f=100 Hz 0.2 0.6 0.2 1 Ω
Temperature Stability V
R
Adjusted to 2.490V
(Note 4) I
R
=
1 mA,
Figure 2
0˚C≤TA≤70˚C (LM336) 1.8 6 mV
−25˚C≤T
A
≤+85˚C 3.5 9 mV
(LM236H, LM236Z)
−25˚C ≤ T
A
≤ +85˚C (LM236M) 7.5 18 mV
−55˚C≤T
A
≤+125˚C (LM136) 12 18 mV
Reverse Breakdown Change 400 µA≤I
R
≤10 mA 3 10 3 12 mV
With Current
Reverse Dynamic Impedance I
R
=
1 mA 0.4 1 0.4 1.4 Ω
Long Term Stability T
A
=
25˚C
±
0.1˚C, I
R
=
1 mA, 20 20 ppm
t=1000 hrs
Note 1: Absolute Maximum Ratings indicatelimits beyond which damage to the device may occur. Electrical specificationsdo not apply when operating the device
beyond its specified operating conditions.
Note 2: For elevated temperature operation, T
j
max is:
LM136 150˚C
LM236 125˚C
LM336 100˚C
Thermal Resistance TO-92 TO-46 SO-8
θ
ja
(Junction to Ambient) 180˚C/W (0.4" leads) 440˚C/W 165˚C/W
170˚C/W (0.125" lead)
θ
ja
(Junction to Case) n/a 80˚C/W n/a
Note 3: Unless otherwise specified, the LM136-2.5 is specified from −55˚C ≤ TA≤ +125˚C, the LM236-2.5 from −25˚C ≤ TA≤ +85˚C and the LM336-2.5 from 0˚C
≤ T
A
≤ +70˚C.
Note 4: Temperature stability for the LM336 and LM236 family isguaranteed by design. Design limits are guaranteed (but not 100%production tested) over the in-
dicated temperature and supplyvoltageranges.These limits are not used to calculate outgoing quality levels. Stability is defined as the maximum change in V
ref
from
25˚C to T
A
(min) or TA(max).
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Typical Performance Characteristics
Reverse Voltage Change
DS005715-21
Zener Noise Voltage
DS005715-22
Dynamic Impedance
DS005715-23
Response Time
DS005715-24
Reverse Characteristics
DS005715-25
Forward Characteristics
DS005715-26
Temperature Drift
DS005715-27
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