LM4040 Precision Micropower Shunt Voltage Reference
April 2005
LM4040
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4040 precision
voltage reference is available in the sub-miniature SC70 and
SOT-23 surface-mount package. The LM4040’s advanced
design eliminates the need for an external stabilizing capaci-
tor while ensuring stability with any capacitive load, thus
making the LM4040 easy to use. Further reducing design
effort is the availability of several fixed reverse breakdown
voltages: 2.048V, 2.500V, 3.000V, 4.096V, 5.000V, 8.192V,
and 10.000V. The minimum operating current increases from
60 µA for the LM4040-2.5 to 100 µA for the LM4040-10.0. All
versions have a maximum operating current of 15 mA.
The LM4040 utilizes fuse and zener-zap reverse breakdown
voltage trim during wafer sort to ensure that the prime parts
have an accuracy of better than
±
0.1% (A grade) at 25˚C.
Bandgap reference temperature drift curvature correction
and low dynamic impedance ensure stable reverse break-
down voltage accuracy over a wide range of operating tem-
peratures and currents.
Also available is the LM4041 with two reverse breakdown
voltage versions: adjustable and 1.2V. Please see the
LM4041 data sheet.
n
Tolerates capacitive loads
n
Fixed reverse breakdown voltages of 2.048V,
2.500V,3.000V, 4.096V, 5.000V, 8.192V, and 10.000V
Key Specifications (LM4040-2.5)
j
Output voltage tolerance
(A grade, 25˚C)
j
Low output noise
±
0.1% (max)
35 µV
rms
(typ)
60 µA to 15 mA
−40˚C to +85˚C
−40˚C to +125˚C
100 ppm/˚C (max)
(10 Hz to 10 kHz)
j
Wide operating current range
j
Industrial temperature range
j
Extended temperature range
j
Low temperature coefficient
Applications
n
n
n
n
n
n
n
n
Portable, Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Product Testing
Automotive
Precision Audio Components
Features
n
Small packages: SOT-23, TO-92 and SC70
n
No output capacitor required
Connection Diagrams
SOT-23
TO-92
SC70
01132301
*This pin must be left floating or connected to
pin 2.
01132303
01132330
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
Bottom View
See NS Package Number Z03A
*
This pin must be left floating or connected to pin
1.
Top View
See NS Package Number MAA05A
© 2005 National Semiconductor Corporation
DS011323
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LM4040
Ordering Information
Industrial Temperature Range (−40˚C to +85˚C)
Reverse
Breakdown
Voltage
Tolerance at
25˚C and
Average
Reverse
Breakdown
Voltage
Temperature
Coefficient
Package
M3 (SOT-23)
Supplied as 1000
Units Tape and
Reel
Supplied as 3000
Units tape and
Reel
M7 (SC70)
Supplied as 1000
Units Tape and
Reel
Supplied as 3000
Units Tape and
Reel
Z (TO-92)
NS
Package
Number
±
0.1%, 100
ppm/˚C max (A
grade)
LM4040AIM3-2.0
LM4040AIM3-2.5
LM4040AIM3-3.0
LM4040AIM3-4.1
LM4040AIM3-5.0
LM4040AIM3-8.2
LM4040AIM3-10.0
LM4040BIM3-2.0
LM4040BIM3-2.5
LM4040BIM3-3.0
LM4040BIM3-4.1
LM4040BIM3-5.0
LM4040BIM3-8.2
LM4040BIM3-10.0
LM4040CIM3-2.0
LM4040CIM3-2.5
LM4040CIM3-3.0
LM4040CIM3-4.1
LM4040CIM3-5.0
LM4040CIM3-8.2
LM4040CIM3-10.0
LM4040DIM3-2.0
LM4040DIM3-2.5
LM4040DIM3-3.0
LM4040DIM3-4.1
LM4040DIM3-5.0
LM4040DIM3-8.2
LM4040DIM3-10.0
LM4040EIM3-2.0
LM4040EIM3-2.5
LM4040EIM3-3.0
LM4040AIM3X-2.0
LM4040AIM3X-2.5
LM4040AIM3X-3.0
LM4040AIM3X-4.1
LM4040AIM3X-5.0
LM4040AIM3X-8.2
LM4040AIM3X-10.0
LM4040BIM3X-2.0
LM4040BIM3X-2.5
LM4040BIM3X-3.0
LM4040BIM3X-4.1
LM4040BIM3X-5.0
LM4040BIM3X-8.2
LM4040BIM3X-10.0
LM4040CIM3X-2.0
LM4040CIM3X-2.5
LM4040CIM3X-3.0
LM4040CIM3X-4.1
LM4040CIM3X-5.0
LM4040CIM3X-8.2
LM4040CIM3X-10.0
LM4040DIM3X-2.0
LM4040DIM3X-2.5
LM4040DIM3X-3.0
LM4040DIM3X-4.1
LM4040DIM3X-5.0
LM4040DIM3X-8.2
LM4040DIM3X-10.0
LM4040BIM7-2.0
LM4040BIM7-2.5
LM4040BIM7-3.0
LM4040BIM7-4.1
LM4040BIM7-5.0
LM4040BIM7X-2.0
LM4040BIM7X-2.5
LM4040BIM7X-3.0
LM4040BIM7X-4.1
LM4040BIM7X-5.0
LM4040AIZ-2.0
LM4040AIZ-2.5
LM4040AIZ-3.0
LM4040AIZ-4.1
LM4040AIZ-5.0
LM4040AIZ-8.2
LM4040AIZ-10.0
MF03A,
Z03A
±
0.2%, 100
ppm/˚C max (B
grade)
LM4040BIZ-2.0
MF03A,
LM4040BIZ-2.5
Z03A,
LM4040BIZ-3.0 MAA05A
LM4040BIZ-4.1
LM4040BIZ-5.0
LM4040BIZ-8.2
LM4040BIZ-10.0
LM4040CIZ-2.0
MF03A,
LM4040CIZ-2.5
Z03A,
LM4040CIZ-3.0 MAA05A
LM4040CIZ-4.1
LM4040CIZ-5.0
LM4040CIZ-8.2
LM4040CIZ-10.0
LM4040DIZ-2.0
MF03A,
LM4040DIZ-2.5
Z03A,
LM4040DIZ-3.0 MAA05A
LM4040DIZ-4.1
LM4040DIZ-5.0
LM4040DIZ-8.2
LM4040DIZ-10.0
MF03A,
Z03A,
MAA05A
±
0.5%, 100
ppm/˚C max (C
grade)
LM4040CIM7-2.0
LM4040CIM7-2.5
LM4040CIM7-3.0
LM4040CIM7-4.1
LM4040CIM7-5.0
LM4040CIM7X-2.0
LM4040CIM7X-2.5
LM4040CIM7X-3.0
LM4040CIM7X-4.1
LM4040CIM7X-5.0
±
1.0%, 150
ppm/˚C max (D
grade)
LM4040DIM7-2.0
LM4040DIM7-2.5
LM4040DIM7-3.0
LM4040DIM7-4.1
LM4040DIM7-5.0
LM4040DIM7X-2.0
LM4040DIM7X-2.5
LM4040DIM7X-3.0
LM4040DIM7X-4.1
LM4040DIM7X-5.0
±
2.0%, 150
ppm/˚C max (E
grade)
LM4040EIM3X-2.0 LM4040EIM7-2.0
LM4040EIM3X-2.5 LM4040EIM7-2.5
LM4040EIM3X-3.0 LM4040EIM7-3.0
LM4040EIM7X-2.0 LM4040EIZ-2.0
LM4040EIM7X-2.5 LM4040EIZ-2.5
LM4040EIM7X-3.0 LM4040EIZ-3.0
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2
LM4040
Extended Temperature Range (−40 ˚C to +125˚C)
Reverse Breakdown
Voltage Tolerance at 25 ˚C
and Average Reverse Breakdown
Voltage Temperature Coefficient
Package
M3 (SOT-23)
See NS Package
Number MF03A
LM4040CEM3-2.0, LM4040CEM3-2.5,
LM4040CEM3-3.0, LM4040CEM3-5.0
LM4040DEM3-2.0, LM4040DEM3-2.5,
LM4040DEM3-3.0, LM4040DEM3-5.0
LM4040EEM3-2.0, LM4040EEM3-2.5,
LM4040EEM3-3.0
±
0.5%, 100 ppm/˚C max (C grade)
±
1.0%, 150 ppm/˚C max (D grade)
±
2.0%, 150 ppm/˚C max (E grade)
3
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LM4040
SOT-23 AND SC70 Package Marking Information
Only three fields of marking are possible on the SOT-23’s and SC70’s small surface. This table gives the meaning of the three
fields.
Part Marking
RJA SOT-23 only
R2A SOT-23 only
RKA SOT-23 only
R4A SOT-23 only
R5A SOT-23 only
R = Reference
Second Field:
J = 2.048V Voltage Option
2 = 2.500V Voltage Option
R8A SOT-23 only
R0A SOT-23 only
RJB
R2B
RKB
R4B
R5B
R8B SOT-23 only
R0B SOT-23 only
RJC
R2C
RKC
R4C
R5C
R8C SOT-23 only
R0C SOT-23 only
RJD
R2D
RKD
R4D
R5D
R8D SOT-23 only
R0D SOT-23 only
RJE
R2E
RKE
A =
±
0.1%, B =
±
0.2%, C = +0.5%, D =
±
1.0%, E =
±
2.0%
A–E = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
Third Field:
8= 8.192V Voltage Option
0 = 10.000V Voltage Option
5 = 5.000V Voltage Option
K = 3.000V Voltage Option
4 = 4.096V Voltage Option
First Field:
Field Definition
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4
LM4040
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Reverse Current
Forward Current
Power Dissipation (T
A
= 25˚C) (Note 2)
M3 Package
Z Package
M7 Package
Storage Temperature
Lead Temperature
M3 Package
Vapor phase (60 seconds)
Infrared (15 seconds)
Z Package
Soldering (10 seconds)
ESD Susceptibility
Human Body Model (Note 3)
2 kV
+260˚C
+215˚C
+220˚C
306 mW
550 mW
241 mW
−65˚C to +150˚C
20 mA
10 mA
Machine Model (Note 3)
200V
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.
Operating Ratings
(Notes 1, 2)
Temperature Range
Industrial Temperature Range
Extended Temperature Range
Reverse Current
LM4040-2.0
LM4040-2.5
LM4040-3.0
LM4040-4.1
LM4040-5.0
LM4040-8.2
LM4040-10.0
60 µA to 15 mA
60 µA to 15 mA
62 µA to 15 mA
68 µA to 15 mA
74 µA to 15 mA
91 µA to 15 mA
100 µA to 15 mA
(T
min
≤
T
A
≤
T
max
)
−40˚C
≤
T
A
≤
+85˚C
−40˚C
≤
T
A
≤
+125˚C
LM4040-2.0
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25˚C. The grades A and B designate initial Re-
verse Breakdown Voltage tolerances of
±
0.1% and
±
0.2%, respectively.
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
(Limit)
(Note 5)
Symbol
Parameter
Conditions
Typical
(Note 4)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA
Reverse Breakdown Voltage I
R
= 100 µA
Tolerance
(Note 6)
2.048
V
±
2.0
±
15
45
60
65
±
4.1
±
17
mV (max)
mV (max)
µA
I
RMIN
Minimum Operating Current
60
65
µA (max)
µA (max)
ppm/˚C
∆V
R
/∆T
Average Reverse Breakdown I
R
= 10 mA
Voltage Temperature
I
R
= 1 mA
Coefficient
I
R
= 100 µA
(Note 6)
±
20
±
15
±
15
0.3
0.8
1.0
2.5
6.0
8.0
6.0
8.0
0.8
0.8
1.0
±
100
±
100
ppm/˚C (max)
ppm/˚C
mV
mV (max)
mV (max)
mV
mV (max)
mV (max)
Ω
Ω
(max)
µV
rms
∆V
R
/∆I
R
Reverse Breakdown Voltage I
RMIN
≤
I
R
≤
1 mA
Change with Operating
Current Change (Note *NO
TARGET FOR *)
1 mA
≤
I
R
≤
15 mA
Z
R
e
N
Reverse Dynamic
Impedance
Wideband Noise
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
I
R
= 100 µA
10 Hz
≤
f
≤
10 kHz
0.3
0.8
35
5
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