LM4041 Precision Micropower Shunt Voltage Reference
March 2005
LM4041
Precision Micropower Shunt Voltage Reference
General Description
Ideal for space critical applications, the LM4041 precision
voltage reference is available in the sub-miniature SC70 and
SOT-23 surface-mount packages. The LM4041’s advanced
design eliminates the need for an external stabilizing capaci-
tor while ensuring stability with any capacitive load, thus
making the LM4041 easy to use. Further reducing design
effort is the availability of a fixed (1.225V) and adjustable
reverse breakdown voltage. The minimum operating current
is 60 µA for the LM4041-1.2 and the LM4041-ADJ. Both
versions have a maximum operating current of 12 mA.
The LM4041 utilizes fuse and zener-zap reverse breakdown
or reference 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 cur-
vature correction and low dynamic impedance ensure stable
reverse breakdown voltage accuracy over a wide range of
operating temperatures and currents.
Key Specifications (LM4041-1.2)
j
Output voltage tolerance
(A grade, 25˚C)
j
Low output noise
±
0.1%(max)
20µV
rms
60µA to 12mA
−40˚C to +85˚C
−40˚C to +125˚C
100 ppm/˚C (max)
(10 Hz to 10kHz)
j
Wide operating current range
j
Industrial temperature range
j
Extended temperature range
j
Low temperature coefficient
Applications
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Portable, Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Automotive
Precision Audio Components
Features
n
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Small packages: SOT-23, TO-92, and SC70
No output capacitor required
Tolerates capacitive loads
Reverse breakdown voltage options of 1.225V and
adjustable
Connection Diagrams
SOT-23
01139201
01139240
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
SC-70
01139246
*This pin must be left floating or connected to pin 1.
01139247
Top View
See NS Package Number MAA05A
© 2005 National Semiconductor Corporation
DS011392
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LM4041
Connection Diagrams
TO-92
(Continued)
01139203
01139232
Bottom View
See NS Package Number Z03A
Ordering Information
Reverse
Breakdown
Voltage
Tolerance at 25˚C
and Average
Reverse
Breakdown
Voltage
Temperature
Coefficient
Package
M3 (SOT-23)
M7 (SC70)
Z (TO-92)
NS
Package
Number
Supplied as 1000
Units Tape and
Reel
Supplied as 3000
Units Tape and
Reel
Supplied as 1000
Units Tape and
Reel
Supplied as 3000
Units Tape and
Reel
±
0.1%, 100
ppm/˚C max (A
grade)
LM4041AIM3-1.2
LM4041AIM3X-1.2
LM4041AIZ-1.2
MF03A,
Z03A
MF03A,
Z03A,
MAA05A
±
0.2%, 100
ppm/˚C max (B
grade)
LM4041BIM3-1.2
LM4041BIM3X-1.2
LM4041BIM7-1.2
LM4041BIM7X-1.2
LM4041BIZ-1.2
±
0.5%, 100
ppm/˚C max (C
grade)
LM4041CEM3-1.2
LM4041CIM3-1.2
LM4041CEM3-ADJ
LM4041CIM3-ADJ
LM4041DEM3-1.2
LM4041DIM3-1.2
LM4041DEM3-ADJ
LM4041DIM3-ADJ
LM4041EEM3-1.2
LM4041EIM3-1.2
LM4041CEM3X-1.2 LM4041CIM7-1.2 LM4041CIM7X-1.2 LM4041CIZ-1.2 MF03A,
LM4041CIM3X-1.2 LM4041CIM7-ADJ LM4041CIM7X-ADJ LM4041CIZ-ADJ Z03A,
LM4041CEM3X-ADJ
MAA05A
LM4041CIM3X-ADJ
LM4041DEM3X-1.2 LM4041DIM7-1.2 LM4041DIM7X-1.2 LM4041DIZ-1.2 MF03A,
LM4041DIM3X-1.2 LM4041DIM7-ADJ LM4041DIM7X-ADJ LM4041DIZ-ADJ Z03A,
LM4041DEM3X-ADJ
MAA05A
LM4041DIM3X-ADJ
LM4041EEM3X-1.2 LM4041EIM7-1.2
LM4041EIM3X-1.2
LM4041EIM7X-1.2
LM4041EIZ-1.2
MF03A,
Z03A,
MAA05A
±
1.0%, 150
ppm/˚C max (D
grade)
±
2.0%, 150
ppm/˚C max (E
grade)
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2
LM4041
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
R1A (SOT-23 Only)
R1B
R1C
R1D
R1E
RAC
RAD
First Field:
R = Reference
Second Field:
1 = 1.225V Voltage Option
A = Adjustable
Third Field:
A–E = Initial Reverse Breakdown
Voltage or Reference Voltage Tolerance
A =
±
0.1%, B =
±
0.2%, C =
±
0.5%, D =
±
1.0%, E =
±
2.0%
Field Definition
3
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LM4041
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
Maximum Output Voltage
(LM4041-ADJ)
Power Dissipation (T
A
= 25˚C) (Note 2)
M3 Package
Z Package
M7 Package
Storage Temperature
Lead Temperature
M3 Packages
Vapor phase (60 seconds)
Infrared (15 seconds)
Z Package
+215˚C
+220˚C
306 mW
550 mW
241mW
−65˚C to +150˚C
15V
20 mA
10 mA
Soldering (10 seconds)
ESD Susceptibility
Human Body Model (Note 3)
Machine Model (Note 3)
+260˚C
2 kV
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
LM4041-1.2
LM4041-ADJ
Output Voltage Range
LM4041-ADJ
1.24V to 10V
60 µA to 12 mA
60 µA to 12 mA
(T
min
≤
T
A
≤
T
max
)
−40˚C
≤
T
A
≤
+85˚C
−40˚C
≤
T
A
≤
+125˚C
LM4041-1.2
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.
Symbol
Parameter
Conditions
Typical
(Note 4)
LM4041AIM3 LM4041BIM3
LM4041AIZ
LM4041BIZ
Limits
LM4041BIM7
(Note 5)
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA
I
R
= 100 µA
1.225
V
±
1.2
±
9.2
45
60
65
±
2.4
±
10.4
60
65
mV (max)
mV (max)
µA
µA (max)
µA (max)
ppm/˚C
ppm/˚C (max)
ppm/˚C
mV
I
RMIN
Minimum Operating Current
∆V
R
/∆T
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
= 10 mA
I
R
= 1 mA
I
R
= 100 µA
I
RMIN
≤
I
R
≤
1 mA
±
20
±
15
±
15
0.7
±
100
±
100
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change
(Note 9)
1.5
2.0
1 mA
≤
I
R
≤
12 mA
4.0
6.0
8.0
1.5
2.0
6.0
8.0
1.5
mV (max)
mV (max)
mV
mV (max)
mV (max)
Ω
Ω
(max)
µV
rms
Z
R
e
N
∆V
R
Reverse Dynamic Impedance
Wideband Noise
Reverse Breakdown Voltage
Long Term Stability
Thermal Hysteresis
(Note 10)
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
I
R
= 100 µA
10 Hz
≤
f
≤
10 kHz
t = 1000 hrs
T = 25˚C
±
0.1˚C
I
R
= 100 µA
∆T
= −40˚C to +125˚C
0.5
1.5
20
120
ppm
V
HYST
0.08
%
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4
LM4041
LM4041-1.2
Electrical Characteristics (Industrial Temperature Range)
LM4041-1.2
Electrical Characteristics (Industrial Temperature Range)
(Continued)
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25˚C. The grades C, D and E designate initial Re-
verse Breakdown Voltage tolerances of
±
0.5%,
±
1.0% and
±
2.0%, respectively.
Symbol
Parameter
Conditions
Typical
(Note 4)
LM4041CIM3 LM4041DIM3 LM4041EIM3
LM4041CIZ
LM4041DIZ
LM4041EIZ
LM4041CIM7 LM4041DIM7 LM4041EIM7
Limits
Limits
(Note
Limits
(Note 5)
5)
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
Reverse Breakdown
Voltage
Tolerance (Note 6)
I
R
= 100 µA
I
R
= 100 µA
1.225
V
±
6
±
14
45
60
65
±
12
±
24
±
25
±
36
mV (max)
mV (max)
µA
I
RMIN
Minimum Operating
Current
65
70
65
70
µA (max)
µA (max)
ppm/˚C
ppm/˚C (max)
ppm/˚C
mV
∆V
R
/∆T V
R
Temperature
Coefficient (Note 6)
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 9)
I
R
= 10 mA
I
R
= 1 mA
I
R
= 100 µA
I
RMIN
≤
I
R
≤
1 mA
±
20
±
15
±
15
0.7
±
100
±
150
±
150
1.5
2.0
1 mA
≤
I
R
≤
12 mA
2.5
6.0
8.0
2.0
2.5
2.0
2.5
mV (max)
mV (max)
mV
8.0
10.0
8.0
10.0
mV (max)
mV (max)
Ω
Z
R
Reverse Dynamic
Impedance
Wideband Noise
Reverse Breakdown
Voltage Long Term
Stability
Thermal Hysteresis
(Note 10)
I
R
= 1 mA, f = 120 Hz
I
AC
= 0.1 I
R
0.5
1.5
20
2.0
2.0
Ω(max)
µV
rms
e
N
∆V
R
I
R
= 100 µA
10 Hz
≤
f
≤
10 kHz
t = 1000 hrs
T = 25˚C
±
0.1˚C
I
R
= 100 µA
∆T
= −40˚C to +125˚C
120
ppm
V
HYST
0.08
%
5
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