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 capacitor 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
Bandgap reference temperature drift curvature correction
and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.
Also available is the LM4041 with two reverse breakdown
voltage versions: adjustable and 1.2V. Please see the
LM4041 data sheet.
±
0.1% (A grade) at 25˚C.
Features
n Small packages: SOT-23, TO-92 and SC70
n No output capacitor required
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
(10 Hz to 10 kHz)35 µV
j
Wide operating current range60 µA to 15 mA
j
Industrial temperature range−40˚C to +85˚C
j
Extended temperature range−40˚C to +125˚C
j
Low temperature coefficient100 ppm/˚C (max)
Applications
n Portable, Battery-Powered Equipment
n Data Acquisition Systems
n Instrumentation
n Process Control
n Energy Management
n Product Testing
n Automotive
n Precision Audio Components
August 2002
±
0.1% (max)
(typ)
rms
LM4040 Precision Micropower Shunt Voltage Reference
Connection Diagrams
SOT-23TO-92SC70
*This pin must be left floating or connected to
pin 2.
0.5%, 100 ppm/˚C max (C grade)LM4040CEM3-2.0, LM4040CEM3-2.5,
±
1.0%, 150 ppm/˚C max (D grade)LM4040DEM3-2.0, LM4040DEM3-2.5,
±
2.0%, 150 ppm/˚C max (E grade)LM4040EEM3-2.0, LM4040EEM3-2.5,
LM4040
Package
M3 (SOT-23)
See NS Package
Number MF03A
LM4040CEM3-3.0, LM4040CEM3-5.0
LM4040DEM3-3.0, LM4040DEM3-5.0
LM4040EEM3-3.0
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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
LM4040
fields.
Part MarkingField Definition
RJA SOT-23 onlyFirst Field:
R2A SOT-23 only
RKA SOT-23 only
R4A SOT-23 onlyR = Reference
R5A SOT-23 onlySecond Field:
J = 2.048V Voltage Option
2 = 2.500V Voltage Option
R8A SOT-23 onlyK = 3.000V Voltage Option
R0A SOT-23 only4 = 4.096V Voltage Option
RJB
R2B5 = 5.000V Voltage Option
RKB
R4B8= 8.192V Voltage Option
R5B0 = 10.000V Voltage Option
R8B SOT-23 only
R0B SOT-23 onlyThird Field:
RJC
R2CA–E = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
RKC
R4CA =
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
±
0.1%, B =±0.2%, C = +0.5%, D =±1.0%, E =±2.0%
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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.
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.
Reverse Current20 mA
Forward Current10 mA
Power Dissipation (T
= 25˚C) (Note 2)
A
M3 Package306 mW
Z Package550 mW
M7 Package241 mW
Storage Temperature−65˚C to +150˚C
Lead Temperature
M3 Package
Vapor phase (60 seconds)+215˚C
Infrared (15 seconds)+220˚C
Z Package
Soldering (10 seconds)+260˚C
ESD Susceptibility
Human Body Model (Note 3)2 kV
Operating Ratings(Notes 1, 2)
Temperature Range(T
Industrial Temperature Range−40˚C ≤ T
Extended Temperature Range−40˚C ≤ T
Reverse Current
LM4040-2.060 µA to 15 mA
LM4040-2.560 µA to 15 mA
LM4040-3.062 µA to 15 mA
LM4040-4.168 µA to 15 mA
LM4040-5.074 µA to 15 mA
LM4040-8.291 µA to 15 mA
LM4040-10.0100 µA to 15 mA
LM4040-2.0
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA=TJ=T
verse Breakdown Voltage tolerances of
SymbolParameterConditions
V
R
Reverse Breakdown Voltage IR= 100 µA2.048V
Reverse Breakdown Voltage
Tolerance
(Note 6)
I
RMIN
∆V
Minimum Operating Current45µA
/∆TAverage Reverse Breakdown
R
Voltage Temperature
Coefficient
(Note 6)
∆V
/∆IRReverse Breakdown Voltage
R
Change with Operating
Current Change (Note *NO
TARGET FOR FNXref
NS4914*)
Z
R
Reverse Dynamic
Impedance
e
N
Wideband NoiseIR= 100 µA35µV
to T
MIN
±
0.1% and±0.2%, respectively.
; all other limits TA=TJ= 25˚C. The grades A and B designate initial Re-
MAX
LM4040AIM3
Typical
(Note 4)
LM4040AIZ
(Limit)
(Note 5)
= 100 µA
I
R
±
2.0
±
15
6060µA (max)
6565µA (max)
=10mA
I
R
I
=1mA
R
= 100 µA
I
R
≤ IR≤ 1 mA0.3mV
I
RMIN
±
20ppm/˚C
±
15
±
15ppm/˚C
±
100
0.80.8mV (max)
1.01.0mV (max)
1mA≤ I
≤ 15 mA2.5mV
R
6.06.0mV (max)
8.08.0mV (max)
IR= 1 mA, f = 120 Hz,
= 0.1 I
I
AC
R
0.3Ω
0.80.8Ω (max)
10 Hz ≤ f ≤ 10 kHz
≤ TA≤ T
min
LM4040BIM3
LM4040BIZ
LM4040BIM7
(Limit)
(Note 5)
±
4.1mV (max)
±
17mV (max)
±
100ppm/˚C (max)
≤ +85˚C
A
+125˚C
Units
(Limit)
rms
max
)
≤
A
www.national.com5
LM4040-2.0
Electrical Characteristics (Industrial Temperature Range)
LM4040
Boldface limits apply for TA=TJ=T
verse Breakdown Voltage tolerances of
to T
MIN
±
0.1% and±0.2%, respectively.
; all other limits TA=TJ= 25˚C. The grades A and B designate initial Re-
MAX
LM4040AIM3
SymbolParameterConditions
Typical
(Note 4)
LM4040AIZ
(Limit)
(Note 5)
∆V
V
R
HYST
Reverse Breakdown Voltage
Long Term Stability
Thermal Hysteresis
(Note 8)
t = 1000 hrs
±
T = 25˚C
= 100 µA
I
R
0.1˚C
∆T = −40˚C to +125˚C
120ppm
0.08%
LM4040-2.0
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA=TJ=T
Reverse Breakdown Voltage tolerances of
SymbolParameterConditionsTypical
V
R
Reverse Breakdown
IR= 100 µA2.048V
Voltage
Reverse Breakdown
= 100 µA
I
R
Voltage Tolerance
(Note 6)
I
RMIN
Minimum Operating
Current
∆V
/∆TAverage Reverse
R
=10mA
I
R
Breakdown Voltage
=1mA
I
Temperature
Coefficient
(Note 6)
/∆IRReverse Breakdown
∆V
R
R
= 100 µA
I
R
I
RMIN
Voltage Change with
Operating Current
Change
(Note *NO TARGET
1mA≤ I
FOR FNXref
NS4914*)
Z
R
e
N
Reverse Dynamic
Impedance
IR= 1 mA, f = 120 Hz0.3Ω
I
= 0.1 I
AC
Wideband NoiseIR= 100 µA35µV
10 Hz ≤ f ≤ 10 kHz
∆V
V
R
HYST
Reverse Breakdown
Voltage Long Term
Stability
Thermal Hysteresis
t = 1000 hrs
T = 25˚C
I
= 100 µA
R
∆T = −40˚C to +125˚C
(Note 8)
MIN
to T
±
; all other limits TA=TJ= 25˚C. The grades C, D and E designate initial
MAX
0.5%,±1.0% and±2.0%, respectively.
LM4040CIM3
(Note 4)
LM4040CIZ
LM4040CIM7
(Limit)
(Note 5)
±
10
±
23
45µA
606565µA (max)
657070µA (max)
±
20ppm/˚C
±
15
±
15ppm/˚C
±
100
≤ IR≤ 1 mA0.3mV
0.81.01.0mV (max)
1.01.21.2mV (max)
≤ 15 mA2.5mV
R
6.08.08.0mV (max)
8.010.010.0mV (max)
R
±
0.1˚C120ppm
0.91.11.1Ω(max)
0.08%
LM4040BIM3
LM4040BIM7
LM4040DIM3
LM4040DIZ
LM4040DIM7
(Limit)
(Note 5)
±
20
±
40
±
150
(Continued)
LM4040BIZ
(Limit)
(Note 5)
LM4040EIM7
LM4040EIZ
(Limit)
(Note 5)
±
±
±
150ppm/˚C (max)
Units
(Limit)
Units
(Limit)
41mV (max)
60mV (max)
rms
www.national.com6
LM4040-2.0
Electrical Characteristics (Extended Temperature Range)
Boldface limits apply for TA=TJ=T
Reverse Breakdown Voltage tolerances of
SymbolParameterConditionsTypical
V
R
Reverse Breakdown
IR= 100 µA2.048V
Voltage
Reverse Breakdown
= 100 µA
I
R
Voltage Tolerance
(Note 6)
I
RMIN
Minimum Operating
Current
∆V
/∆TAverage Reverse
R
=10mA
I
R
Breakdown Voltage
=1mA
I
Temperature
Coefficient
(Note 6)
/∆IRReverse Breakdown
∆V
R
R
= 100 µA
I
R
I
RMIN
Voltage Change with
Operating Current
Change
(Note 7)
1mA≤ I
Z
R
e
N
Reverse Dynamic
Impedance
IR= 1 mA, f = 120 Hz,
= 0.1 I
I
AC
Wideband NoiseIR= 100 µA35µV
10 Hz ≤ f ≤ 10 kHz
∆V
V
HYST
Reverse Breakdown
R
Voltage Long Term
Stability
Thermal Hysteresis
t = 1000 hrs
T = 25˚C
= 100 µA
I
R
∆T = −40˚C to +125˚C
(Note 8)
MIN
to T
±
; all other limits TA=TJ= 25˚C. The grades C, D and E designate initial
MAX
0.5%,±1.0% and±2.0%, respectively.
(Note 4)
LM4040CEM3
(Limit)
(Note 5)
±
10
±
30
LM4040DEM3
(Limit)
(Note 5)
±
±
45µA
606565µA (max)
687373µA (max)
±
20ppm/˚C
±
15
±
15ppm/˚C
±
100
±
≤ IR≤ 1 mA0.3mV
0.81.01.0mV (max)
1.01.21.2mV (max)
≤ 15 mA2.5mV
R
6.08.08.0mV (max)
8.010.010.0mV (max)
0.3Ω
R
±
0.1˚C
120ppm
0.91.11.1Ω (max)
0.08%
20
50
150
LM4040EEM3
(Limit)
(Note 5)
±
41mV (max)
±
70mV (max)
±
150ppm/˚C (max)
LM4040
Units
(Limit)
rms
LM4040-2.5
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA=TJ=T
verse Breakdown Voltage tolerances of
SymbolParameterConditions
V
R
Reverse Breakdown Voltage IR= 100 µA2.500V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
RMIN
Minimum Operating Current45µA
to T
MIN
±
0.1% and±0.2%, respectively.
I
= 100 µA
R
; all other limits TA=TJ= 25˚C. The grades A and B designate initial Re-
MAX
Typical
(Note 4)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
±
2.5
±
19
6060µA (max)
6565µA (max)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
±
5.0mV (max)
±
21mV (max)
Units
(Limit)
www.national.com7
LM4040-2.5
Electrical Characteristics (Industrial Temperature Range)
LM4040
Boldface limits apply for TA=TJ=T
verse Breakdown Voltage tolerances of
SymbolParameterConditions
/∆TAverage Reverse Breakdown
∆V
R
Voltage Temperature
Coefficient (Note 6)
∆V
/∆IRReverse Breakdown Voltage
R
Change with Operating
Current Change (Note 7)
Z
R
Reverse Dynamic
Impedance
e
∆V
N
Wideband NoiseIR= 100 µA35µV
Reverse Breakdown Voltage
R
Long Term Stability
V
HYST
Thermal Hysteresis
(Note 8)
to T
MIN
±
0.1% and±0.2%, respectively.
; all other limits TA=TJ= 25˚C. The grades A and B designate initial Re-
MAX
LM4040AIM3
Typical
(Note 4)
LM4040AIZ
(Limit)
(Note 5)
=10mA
I
R
I
=1mA
R
I
= 100 µA
R
≤ IR≤ 1 mA0.3mV
I
RMIN
1mA≤ I
≤ 15 mA2.5mV
R
IR= 1 mA, f = 120 Hz,
= 0.1 I
I
AC
R
±
20ppm/˚C
±
15
±
15ppm/˚C
0.3Ω
10 Hz ≤ f ≤ 10 kHz
t = 1000 hrs
±
T = 25˚C
= 100 µA
I
R
0.1˚C
∆T = −40˚C to +125˚C
120ppm
0.08%
(Continued)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
Units
(Limit)
(Note 5)
±
100
±
100ppm/˚C (max)
0.80.8mV (max)
1.01.0mV (max)
6.06.0mV (max)
8.08.0mV (max)
0.80.8Ω (max)
rms
LM4040-2.5
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA=TJ=T
Reverse Breakdown Voltage tolerances of
SymbolParameterConditionsTypical
V
R
Reverse Breakdown
IR= 100 µA2.500V
Voltage
Reverse Breakdown
= 100 µA
I
R
Voltage Tolerance
(Note 6)
I
RMIN
Minimum Operating
Current
∆V
/∆TAverage Reverse
R
Breakdown Voltage
Temperature
Coefficient(Note 6)
=10mA
I
R
I
=1mA
R
= 100 µA
I
R
MIN
to T
±
; all other limits TA=TJ= 25˚C. The grades C, D and E designate initial
MAX
0.5%,±1.0% and±2.0%, respectively.
LM4040CIM3
(Note 4)
LM4040DIZ
LM4040CIM7
(Note 5)
45µA
±
20ppm/˚C
±
15
±
15ppm/˚C
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
Limits
(Note 5)
±
12
±
29
±
±
606565µA (max)
657070µA (max)
±
100
±
25
49
150
LM4040EIM7
LM4040EIZ
Limits
(Note 5)
±
50mV (max)
±
74mV (max)
±
150ppm/˚C (max)
Units
(Limit)
www.national.com8
LM4040-2.5
Electrical Characteristics (Industrial Temperature Range)
Boldface limits apply for TA=TJ=T
Reverse Breakdown Voltage tolerances of
SymbolParameterConditionsTypical
/∆IRReverse Breakdown
∆V
R
I
RMIN
Voltage Change with
Operating Current
Change
1mA≤ I
(Note 7)
Z
R
e
N
Reverse Dynamic
Impedance
IR= 1 mA, f = 120 Hz0.3Ω
I
= 0.1 I
AC
Wideband NoiseIR= 100 µA35µV
10 Hz ≤ f ≤ 10 kHz
∆V
V
R
HYST
Reverse Breakdown
Voltage Long Term
Stability
Thermal Hysteresis
t = 1000 hrs
T = 25˚C
I
= 100 µA
R
∆T = −40˚C to +125˚C
(Note 8)
MIN
to T
±
; all other limits TA=TJ= 25˚C. The grades C, D and E designate initial
MAX
0.5%,±1.0% and±2.0%, respectively.
(Note 4)
LM4040CIM3
LM4040DIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
≤ IR≤ 1 mA0.3mV
0.81.01.0mV (max)
1.01.21.2mV (max)
≤ 15 mA2.5mV
R
6.08.08.0mV (max)
8.010.010.0mV (max)
R
±
0.1˚C120ppm
0.91.11.1Ω(max)
0.08%
(Continued)
LM4040EIM7
LM4040EIZ
Limits
(Note 5)
LM4040
Units
(Limit)
rms
LM4040-2.5
Electrical Characteristics (Extended Temperature Range)
Boldface limits apply for TA=TJ=T
Reverse Breakdown Voltage tolerances of
SymbolParameterConditionsTypical
V
R
Reverse Breakdown
IR= 100 µA2.500V
Voltage
Reverse Breakdown
= 100 µA
I
R
Voltage
Tolerance(Note 6)
I
RMIN
Minimum Operating
Current
∆V
/∆TAverage Reverse
R
Breakdown Voltage
Temperature
Coefficient (Note 6)
∆V
/∆IRReverse Breakdown
R
=10mA
I
R
I
=1mA
R
= 100 µA
I
R
I
RMIN
Voltage Change with
Operating Current
Change
(Note 7)
1mA≤ I
MIN
to T
±
; all other limits TA=TJ= 25˚C. The grades C, D and E designate initial
MAX
0.5%,±1.0% and±2.0%, respectively.
(Note 4)
LM4040CEM3
Limits
(Note 5)
±
12
±
38
LM4040DEM3
Limits
(Note 5)
±
±
45µA
606565µA (max)
687373µA (max)
±
20ppm/˚C
±
15
±
15ppm/˚C
±
100
±
≤ IR≤ 1 mA0.3mV
0.81.01.0mV (max)
1.01.21.2mV (max)
≤ 15 mA2.5mV
R
6.08.08.0mV (max)
8.010.010.0mV (max)
25
63
150
LM4040EEM3
Limits
(Note 5)
±
50mV (max)
±
88mV (max)
±
150ppm/˚C (max)
Units
(Limit)
www.national.com9
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