NSC LM136AH

LM136A-2.5/LM136-2.5QML
Reference Diode
General Description
Features
The LM136A-2.5/LM136-2.5 integrated circuit is a precision
2.5V shunt regulator diode. This monolithic IC voltage reference 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 coefficient to be trimmed easily.
The LM136-2.5 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 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.
■ Available with radiation guarantee
■
■
■
■
■
■
100 krad(Si)
— Total Ionizing Dose
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
LM136H-2.5/883
LM136AH-2.5-SMD
8418003XA
LM136AH-2.5/883
Package Description
H03H
T0-46, 3LD Metal Can
H03H
T0-46, 3LD Metal Can
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
© 2007 National Semiconductor Corporation
201397
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LM136A-2.5/LM136-2.5QML Reference Diode
November 8, 2007
LM136A-2.5/LM136-2.5QML
Schematic Diagram
20139701
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2
LM136A-2.5/LM136-2.5QML
Typical Applications
†Adjust
2.5V Reference
*Any
to 2.490V
silicon signal diode
Wide Input Range Reference
20139709
2.5V Reference with Minimum
Temperature Coefficient
20139711
20139710
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LM136A-2.5/LM136-2.5QML
Absolute Maximum Ratings (Note 1)
Reverse Current
Forward Current
Storage Temperature
15 mA
10 mA
−60°C ≤ TA ≤ +150°C
−55°C ≤ TA ≤ +125°C
+150°C
300°C
Operating Temperature Range (Note 2)
Maximum Junction Temperature (TJ)(Note 2)
Lead Temperature (Soldering 10 seconds)
Thermal Resistance
θJA
Still Air Flow
500LF/Min Air Flow
354°C/W
77°C/W
46°C/W
θJC
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.
Symbol
Parameter
IR = 1mA
Conditions
IAdj
Adjust Current
VAdj = 0.7V
Delta VZ
Delta Zener Voltage
0.4mA ≤ IZ ≤ 10 mA
VZ
Zener Voltage
Notes
VAdj = Open
VAdj = 0.7V
VAdj = 1.9V
ZRD
Reverse Dynamic Impedance
VStab
Temperature Stability
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(Note 4)
VZ = Adjusted to 2.490V
4
Min
Max
Unit
Subgroups
-125
+125
µA
1, 2, 3
6.0
mV
1
10
mV
2, 3
2.44
2.54
V
1
2.42
2.56
V
2, 3
2.39
2.49
V
1
2.29
2.49
V
2, 3
2.49
2.69
V
1, 2, 3
1.0
Ω
1, 2, 3
18
mV
2, 3
DC Parameters
The following conditions apply, unless otherwise specified.
Symbol
Parameter
IR = 1mA
Conditions
IAdj
Adjust Current
VAdj = 0.7V
Delta VZ
Delta Zener Voltage
0.4mA ≤ IZ ≤ 10 mA
VZ
Zener Voltage
Notes
VAdj = Open
VAdj = 0.7V
VAdj = 1.9V
ZRD
Reverse Dynamic Impedance
VStab
Temperature Stability
Min
Max
Unit
Subgroups
-125
+125
µA
1, 2, 3
6.0
mV
1
10
mV
2, 3
2.465 2.515
V
1
2.44
2.54
V
2, 3
2.39
2.49
V
1
2.29
2.49
V
2, 3
2.49
2.69
V
1, 2, 3
(Note 4)
0.6
Ω
1
(Note 4)
1.0
Ω
mV
2, 3
18
Min
Max
Unit
Subgroups
VAdj = Open
−10
+10
mV
1
VAdj = 0.7V
−10
+10
mV
1
VAdj = 1.9V
−10
+10
mV
1
VZ = Adjusted to 2.490V
2, 3
DC Drift Parameters
Delta calculations are performed on QMLV devices at Group B, Subgroup 5 only.
Symbol
VZ
Parameter
Zener Voltage
Conditions
Notes
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.
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LM136A-2.5/LM136-2.5QML
LM136A-2.5 Electrical Characteristics
LM136A-2.5/LM136-2.5QML
Typical Performance Characteristics
Reverse Voltage Change
Zener Noise Voltage
20139722
20139721
Response Time
Dynamic Impedance
20139724
20139723
Reverse Characteristics
Forward Characteristics
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20139726
6
LM136A-2.5/LM136-2.5QML
Temperature Drift
20139728
FIGURE 1. LM136 With Pot for Adjustment
of Breakdown Voltage
(Trim Range = ±120 mV typical)
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 coefficient can be adjusted to optimize circuit performance.
Figure 1 shows an LM136 with a 10k potentiometer for adjusting 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 signal 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.
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%
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LM136A-2.5/LM136-2.5QML
Precision Power Regulator with Low Temperature Coefficient
20139713
5V Crowbar
Trimmed 2.5V Reference with
Temperature Coefficient Independent
of Breakdown Voltage
20139715
*Does
not affect temperature coefficient
20139714
Adjustable Shunt Regulator
20139706
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8
LM136A-2.5/LM136-2.5QML
Linear Ohmmeter
20139716
Op Amp with Output Clamped
Bipolar Output Reference
20139717
20139718
9
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LM136A-2.5/LM136-2.5QML
2.5V Square Wave Calibrator
Low Noise Buffered Reference
20139719
20139731
5V Buffered Reference
20139730
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10
Date Released
Revision
07/06/07
A
Section
New Release, Corporate format
11
Originator
Changes
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.
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LM136A-2.5/LM136-2.5QML
Revision History
LM136A-2.5/LM136-2.5QML Reference Diode
Physical Dimensions inches (millimeters) unless otherwise noted
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