5962R0050102VXX - Defense Logistics Agency

July 2007

LM136A-2.5/LM136-2.5QML

Reference Diode

General Description

The LM136A-2.5/LM136-2.5 integrated circuit is a precision

2.5V shunt regulator diode. This monolithic IC voltage refer-

ence operates as a low-temperature-coefficient 2.5V zener

with 0.2Ω dynamic impedance. A third terminal on the

LM136-2.5 allows the reference voltage and temperature co-

efficient to be trimmed easily.

The LM136-2.5 is useful as a precision 2.5V low voltage ref-

erence for digital voltmeters, power supplies or op amp cir-

cuitry. The 2.5V make it convenient to obtain 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.

Features

■Available with radiation guarantee

—Total Ionizing Dose 100 krad(Si)

■Low temperature coefficient

■Wide operating current of 400 μA to 10 mA

■Guaranteed temperature stability

■Easily trimmed for minimum temperature drift

■Fast turn-on

■3–lead transistor package

Ordering Information

NS Part Number SMD Part Number NS Package Number Package Description

LM136H-2.5/883 H03H T0-46, 3LD Metal Can

LM136AH-2.5-SMD 8418003XA H03H T0-46, 3LD Metal Can

LM136AH-2.5/883 H03H T0-46, 3LD Metal Can

LM136AH-2.5RQV

(Note 5)

5962R0050101VXA

100 krad(Si)

H03H T0-46, 3LD Metal Can

LM136AH-2.5RLQV

(Note 6)

5962R0050102VXA

100 krad(Si)

H03H T0-46, 3LD Metal Can

Connection Diagram

TO-46

Metal Can Package

20139720

Bottom View

See NS Package Number H03H

LM136A-2.5/LM136-2.5QML Reference Diode

Schematic Diagram

20139701

www.national.com 2

LM136A-2.5/LM136-2.5QML

Typical Applications

2.5V Reference

20139709

2.5V Reference with Minimum

Temperature Coefficient

20139710

†Adjust to 2.490V

*Any silicon signal diode

Wide Input Range Reference

20139711

3 www.national.com

LM136A-2.5/LM136-2.5QML

Absolute Maximum Ratings (Note 1)

Reverse Current 15 mA

Forward Current 10 mA

Storage Temperature −60°C ≤ TA ≤ +150°C

Operating Temperature Range (Note 2) −55°C ≤ TA ≤ +125°C

Maximum Junction Temperature (TJ)(Note 2) +150°C

Lead Temperature (Soldering 10 seconds) 300°C

Thermal Resistance

θJA

Still Air Flow 354°C/W

500LF/Min Air Flow 77°C/W

θJC 46°C/W

ESD Rating (Note 3) 1,000V

Quality Conformance Inspection

Mil-Std-883, Method 5005 - Group A

Subgroup Description Temp°C

1 Static tests at 25

2 Static tests at 125

3 Static tests at -55

4 Dynamic tests at 25

5 Dynamic tests at 125

6 Dynamic tests at -55

7 Functional tests at 25

8A Functional tests at 125

8B Functional tests at -55

9 Switching tests at 25

10 Switching tests at 125

11 Switching tests at -55

12 Settling time at 25

13 Settling time at 125

14 Settling time at -55

LM136-2.5 Electrical Characteristics

DC Parameters

The following conditions apply, unless otherwise specified. IR = 1mA

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

IAdj Adjust Current VAdj = 0.7V -125 +125 µA 1, 2, 3

Delta VZDelta Zener Voltage 0.4mA ≤ IZ ≤ 10 mA 6.0 mV 1

10 mV 2, 3

VZZener Voltage VAdj = Open 2.44 2.54 V 1

2.42 2.56 V 2, 3

VAdj = 0.7V 2.39 2.49 V 1

2.29 2.49 V 2, 3

VAdj = 1.9V 2.49 2.69 V 1, 2, 3

ZRD Reverse Dynamic Impedance (Note 4) 1.0 Ω1, 2, 3

VStab Temperature Stability VZ = Adjusted to 2.490V 18 mV 2, 3

www.national.com 4

LM136A-2.5/LM136-2.5QML

LM136A-2.5 Electrical Characteristics

DC Parameters

The following conditions apply, unless otherwise specified. IR = 1mA

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

IAdj Adjust Current VAdj = 0.7V -125 +125 µA 1, 2, 3

Delta VZDelta Zener Voltage 0.4mA ≤ IZ ≤ 10 mA 6.0 mV 1

10 mV 2, 3

VZZener Voltage VAdj = Open 2.465 2.515 V 1

2.44 2.54 V 2, 3

VAdj = 0.7V 2.39 2.49 V 1

2.29 2.49 V 2, 3

VAdj = 1.9V 2.49 2.69 V 1, 2, 3

ZRD Reverse Dynamic Impedance (Note 4) 0.6 Ω1

(Note 4) 1.0 Ω2, 3

VStab Temperature Stability VZ = Adjusted to 2.490V 18 mV 2, 3

DC Drift Parameters

Delta calculations are performed on QMLV devices at Group B, Subgroup 5 only.

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

VZZener Voltage VAdj = Open −10 +10 mV 1

VAdj = 0.7V −10 +10 mV 1

VAdj = 1.9V −10 +10 mV 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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test

conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (package

junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax = (TJmax - TA)/

θJA or the number given in the Absolute Maximum Ratings, whichever is lower.

Note 3: Human body model, 1.5KΩ in series with 100pF.

Note 4: Parameter tested go-no-go only.

Note 5: Pre and post irradiation limits are identical to those listed under DC electrical characteristics. These parts may be dose rate sensitive in a space

environment and may demonstrate enhanced low dose rate effect. Radiation end point limits for the noted parameters are guaranteed only for the conditions as

specified in Mil-Std-883, Method 1019.

Note 6: Low dose rate testing has been performed on a wafer-by-wafer basis, per test method 1019 condition D of MIL-STD-883, with no enhanced low dose

rate sensitivity (ELDRS) effect.

5 www.national.com

LM136A-2.5/LM136-2.5QML

Typical Performance Characteristics

Reverse Voltage Change

20139721

Zener Noise Voltage

20139722

Dynamic Impedance

20139723

Response Time

20139724

Reverse Characteristics

20139725

Forward Characteristics

20139726

www.national.com 6

LM136A-2.5/LM136-2.5QML

Temperature Drift

20139727

Application Hints

The LM136 series voltage references are much easier to use

than ordinary zener diodes. Their low impedance and wide

operating current range simplify biasing in almost any circuit.

Further, either the breakdown voltage or the temperature co-

efficient can be adjusted to optimize circuit performance.

Figure 1 shows an LM136 with a 10k potentiometer for ad-

justing the reverse breakdown voltage. With the addition of

R1 the breakdown voltage can be adjusted without affecting

the temperature coefficient of the device. The adjustment

range is usually sufficient to adjust for both the initial device

tolerance and inaccuracies in buffer circuitry.

If minimum temperature coefficient is desired, two diodes can

be added in series with the adjustment potentiometer as

shown in Figure 2. When the device is adjusted to 2.490V the

temperature coefficient is minimized. Almost any silicon sig-

nal diode can be used for this purpose such as a 1N914,

1N4148 or a 1N457. For proper temperature compensation

the diodes should be in the same thermal environment as the

LM136. It is usually sufficient to mount the diodes near the

LM136 on the printed circuit board. The absolute resistance

of R1 is not critical and any value from 2k to 20k will work.

20139728

FIGURE 1. LM136 With Pot for Adjustment

of Breakdown Voltage

(Trim Range = ±120 mV typical)

20139729

FIGURE 2. Temperature Coefficient Adjustment

(Trim Range = ±70 mV typical)

Low Cost 2 Amp Switching Regulator†

20139705

*L1 60 turns #16 wire on Arnold Core A-254168-2

†Efficiency ≈ 80%

7 www.national.com

LM136A-2.5/LM136-2.5QML

Precision Power Regulator with Low Temperature Coefficient

20139713

5V Crowbar

20139714

Trimmed 2.5V Reference with

Temperature Coefficient Independent

of Breakdown Voltage

20139715

*Does not affect temperature coefficient

Adjustable Shunt Regulator

20139706

www.national.com 8

LM136A-2.5/LM136-2.5QML

Linear Ohmmeter

20139716

Op Amp with Output Clamped

20139717

Bipolar Output Reference

20139718

9 www.national.com

LM136A-2.5/LM136-2.5QML

2.5V Square Wave Calibrator

20139719

5V Buffered Reference

20139730

Low Noise Buffered Reference

20139731

www.national.com 10

LM136A-2.5/LM136-2.5QML

Revision History

Date Released Revision Section Originator Changes

07/06/07 A New Release, Corporate format L. Lytle 2 MDS datasheets converted into one

corporate datasheet format. MNLM136–2.5–X

Rev 0A0 and MNLM136A-2.5–X-RH. The

ELDRS Part has also been added. Rev. 0E0

will be archived.

11 www.national.com

LM136A-2.5/LM136-2.5QML

Physical Dimensions inches (millimeters) unless otherwise noted

NS Package Number H03H

LM136A-2.5/LM136-2.5QML Reference Diode

THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION

(“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY

OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO

SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS,

IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS

DOCUMENT.

TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT

NATIONAL’S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL

PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR

APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND

APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE

NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS.

EXCEPT AS PROVIDED IN NATIONAL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO

LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE

AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR

PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY

RIGHT.

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR

SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and

whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected

to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform

can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.

National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other

brand or product names may be trademarks or registered trademarks of their respective holders.

For the most current product information visit us at www.national.com

National Semiconductor

Americas Customer

Support Center

Email:

new.feedback@nsc.com

Tel: 1-800-272-9959

National Semiconductor Europe

Customer Support Center

Fax: +49 (0) 180-530-85-86

Email: europe.support@nsc.com

Deutsch Tel: +49 (0) 69 9508 6208

English Tel: +49 (0) 870 24 0 2171

Français Tel: +33 (0) 1 41 91 8790

National Semiconductor Asia

Pacific Customer Support Center

Email: ap.support@nsc.com

National Semiconductor Japan

Customer Support Center

Fax: 81-3-5639-7507

Email: jpn.feedback@nsc.com

Tel: 81-3-5639-7560