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 A 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 25C. 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.
Features
n
Small packages: SOT-23, TO-92, and SC70
n
No output capacitor required
n
Tolerates capacitive loads
n
Reverse breakdown voltage options of 1.225V and
adjustable
Key Specifications (LM4041-1.2)
j
Output voltage tolerance
(A grade, 25C)
0.1%(max)
j
Low output noise
(10 Hz to 10kHz)
20V
rms
j
Wide operating current range
60A to 12mA
j
Industrial temperature range
-40C to +85C
j
Extended temperature range
-40C to +125C
j
Low temperature coefficient
100 ppm/C (max)
Applications
n
Portable, Battery-Powered Equipment
n
Data Acquisition Systems
n
Instrumentation
n
Process Control
n
Energy Management
n
Automotive
n
Precision Audio Components
Connection Diagrams
SOT-23
DS011392-1
*This pin must be left floating or connected to pin 2.
DS011392-40
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
SC-70
DS011392-46
*This pin must be left floating or connected to pin 1.
DS011392-47
Top View
See NS Package Number MAA05A
January 2001
LM4041
Precision
Micropower
Shunt
V
oltage
Reference
2001 National Semiconductor Corporation
DS011392
www.national.com
Connection Diagrams
(Continued)
Ordering Information
Reverse
Breakdown
Voltage Tolerance
at 25C and
Average Reverse
Breakdown
Voltage
Temperature
Coefficient
Package
NS
Package
Number
M3 (SOT-23)
M7 (SC70)
Z (TO-92)
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
0.2%, 100 ppm/C
max (B grade)
LM4041BIM3-1.2
LM4041BIM3X-1.2
LM4041BIM7-1.2
LM4041BIM7X-1.2
LM4041BIZ-1.2
MF03A,
Z03A,
MAA05A
0.5%, 100 ppm/C
max (C grade)
LM4041CEM3-1.2
LM4041CIM3-1.2
LM4041CEM3-ADJ
LM4041CIM3-ADJ
LM4041CEM3X-1.2
LM4041CIM3X-1.2
LM4041CEM3X-ADJ
LM4041CIM3X-ADJ
LM4041CIM7-1.2
LM4041CIM7-ADJ
LM4041CIM7X-1.2
LM4041CIM7X-ADJ
LM4041CIZ-1.2
LM4041CIZ-ADJ
MF03A,
Z03A,
MAA05A
1.0%, 150 ppm/C
max (D grade)
LM4041DEM3-1.2
LM4041DIM3-1.2
LM4041DEM3-ADJ
LM4041DIM3-ADJ
LM4041DEM3X-1.2
LM4041DIM3X-1.2
LM4041DEM3X-ADJ
LM4041DIM3X-ADJ
LM4041DIM7-1.2
LM4041DIM7-ADJ
LM4041DIM7X-1.2
LM4041DIM7X-ADJ
LM4041DIZ-1.2
LM4041DIZ-ADJ
MF03A,
Z03A,
MAA05A
2.0%, 150 ppm/C
max (E grade)
LM4041EEM3-1.2
LM4041EIM3-1.2
LM4041EEM3X-1.2
LM4041EIM3X-1.2
LM4041EIM7-1.2
LM4041EIM7X-1.2
LM4041EIZ-1.2
MF03A,
Z03A,
MAA05A
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
Field Definition
R1A (SOT-23 Only)
First Field:
R1B
R = Reference
R1C
Second Field:
R1D
1 = 1.225V Voltage Option
R1E
A = Adjustable
Third Field:
RAC
AE = Initial Reverse Breakdown
RAD
Voltage or Reference Voltage Tolerance
A =
0.1%, B =
0.2%, C =
0.5%, D =
1.0%, E =
2.0%
TO-92
DS011392-3
DS011392-32
Bottom View
See NS Package Number Z03A
LM4041
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2
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
20 mA
Forward Current
10 mA
Maximum Output Voltage
(LM4041-ADJ)
15V
Power Dissipation (T
A
= 25C) (Note 2)
M3 Package
306 mW
Z Package
550 mW
M7 Package
241mW
Storage Temperature
-65C to +150C
Lead Temperature
M3 Packages
Vapor phase (60 seconds)
+215C
Infrared (15 seconds)
+220C
Z Package
Soldering (10 seconds)
+260C
ESD Susceptibility
Human Body Model (Note 3)
2 kV
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
(T
min
T
A
T
max
)
Industrial Temperature Range
-40C
T
A
+85C
Extended Temperature Range
-40C
T
A
+125C
Reverse Current
LM4041-1.2
60 A to 12 mA
LM4041-ADJ
60 A to 12 mA
Output Voltage Range
LM4041-ADJ
1.24V to 10V
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
= 25C. 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
LM4041AIZ
Limits
(Note 5)
LM4041BIM3
LM4041BIZ
LM4041BIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage
I
R
= 100 A
1.225
V
Reverse Breakdown Voltage
I
R
= 100 A
1.2
2.4
mV (max)
Tolerance (Note 6)
9.2
10.4
mV (max)
I
RMIN
Minimum Operating Current
45
A
60
60
A (max)
65
65
A (max)
V
R
/
T
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
= 10 mA
20
ppm/C
I
R
= 1 mA
15
100
100
ppm/C (max)
I
R
= 100 A
15
ppm/C
V
R
/
I
R
Reverse Breakdown Voltage
Change with Operating
Current Change
I
RMIN
I
R
1 mA
0.7
mV
1.5
1.5
mV (max)
2.0
2.0
mV (max)
1 mA
I
R
12 mA
4.0
mV
6.0
6.0
mV (max)
8.0
8.0
mV (max)
Z
R
Reverse Dynamic Impedance
I
R
= 1 mA, f = 120 Hz,
0.5
I
AC
= 0.1 I
R
1.5
1.5
(max)
e
N
Wideband Noise
I
R
= 100 A
20
V
rms
10 Hz
f
10 kHz
V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25C
0.1C
120
ppm
I
R
= 100 A
LM4041
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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
= 25C. 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
LM4041CIZ
LM4041CIM7
Limits
(Note 5)
LM4041DIM3
LM4041DIZ
LM4041DIM7
Limits(Note
5)
LM4041EIM3
LM4041EIZ
LM4041EIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 A
1.225
V
Reverse Breakdown
Voltage
I
R
= 100 A
6
12
25
mV (max)
Tolerance (Note 6)
14
24
36
mV (max)
I
RMIN
Minimum Operating
Current
45
A
60
65
65
A (max)
65
70
70
A (max)
V
R
/
T
V
R
Temperature
Coefficient (Note 6)
I
R
= 10 mA
20
ppm/C
I
R
= 1 mA
15
100
150
150
ppm/C (max)
I
R
= 100 A
15
ppm/C
V
R
/
I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
I
RMIN
I
R
1 mA
0.7
mV
1.5
2.0
2.0
mV (max)
2.0
2.5
2.5
mV (max)
1 mA
I
R
12 mA
2.5
mV
6.0
8.0
8.0
mV (max)
8.0
10.0
10.0
mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA,
f = 120 Hz
0.5
I
AC
= 0.1 I
R
1.5
2.0
2.0
(max)
e
N
Wideband Noise
I
R
= 100 A
20
V
rms
10 Hz
f
10 kHz
V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25C
0.1C
120
ppm
I
R
= 100 A
LM4041
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4
LM4041-1.2
Electrical Characteristics (Extended Temperature Range)
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
= 25C. The grades C, D and E designate initial Re-
verse Breakdown Voltage tolerance of
0.5%,
1.0% and
2.0% respectively.
Symbol
Parameter
Conditions
Typical
(Note 4)
LM4041CEM3
Limits
(Note 5)
LM4041DEM3
Limits
(Note 5)
LM4041EEM3
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 A
1.225
V
Reverse Breakdown
Voltage Error
I
R
= 100 A
6
12
25
mV (max)
(Note 6)
18.4
31
43
mV (max)
I
RMIN
Minimum Operating
Current
45
A
60
65
65
A (max)
68
73
73
A (max)
V
R
/
T
VR Temperature
Coefficient(Note 6)
I
R
= 10 mA
20
ppm/C
I
R
= 1 mA
15
100
150
150
ppm/C
(max)
I
R
= 100 A
15
ppm/C
V
R
/
I
R
Reverse Breakdown
Change with
Current
I
RMIN
I
R
1.0 mA
0.7
mV
1.5
2.0
2.0
mV (max)
2.0
2.5
2.5
mV (max)
1 mA
I
R
12 mA
2.5
mV
6.0
8.0
8.0
mV (max)
8.0
10.0
10.0
mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120
Hz,
0.5
I
AC
= 0.1 I
R
1.5
2.0
2.0
(max)
e
N
Noise Voltage
I
R
= 100 A
20
V
rms
10 Hz
f
10 kHz
V
R
Long Term Stability
(Non-Cumulative)
t = 1000 hrs
T = 25C
0.1C
120
ppm
I
R
= 100 A
LM4041
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