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.
Features
nSmall packages: SOT-23, TO-92 and SC70
nNo output capacitor required
nTolerates capacitive loads
nFixed reverse breakdown voltages of 2.048V,
2.500V,3.000V, 4.096V, 5.000V, 8.192V, and 10.000V
Key Specifications (LM4040-2.5)
jOutput voltage tolerance
(A grade, 25˚C) ±0.1% (max)
jLow output noise
(10 Hz to 10 kHz) 35 µV
rms
(typ)
jWide operating current range 60 µA to 15 mA
jIndustrial temperature range −40˚C to +85˚C
jExtended temperature range −40˚C to +125˚C
jLow temperature coefficient 100 ppm/˚C (max)
Applications
nPortable, Battery-Powered Equipment
nData Acquisition Systems
nInstrumentation
nProcess Control
nEnergy Management
nProduct Testing
nAutomotive
nPrecision Audio Components
Connection Diagrams
SOT-23 TO-92 SC70
01132301
*This pin must be left floating or connected to
pin 2.
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
01132303
Bottom View
See NS Package Number Z03A
01132330
*This pin must be left floating or connected to pin
1.
Top View
See NS Package Number MAA05A
August 2002
LM4040 Precision Micropower Shunt Voltage Reference
© 2002 National Semiconductor Corporation DS011323 www.national.com
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
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)
LM4040AIM3-2.0
LM4040AIM3-2.5
LM4040AIM3-3.0
LM4040AIM3-4.1
LM4040AIM3-5.0
LM4040AIM3-8.2
LM4040AIM3-10.0
LM4040AIM3X-2.0
LM4040AIM3X-2.5
LM4040AIM3X-3.0
LM4040AIM3X-4.1
LM4040AIM3X-5.0
LM4040AIM3X-8.2
LM4040AIM3X-10.0
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)
LM4040BIM3-2.0
LM4040BIM3-2.5
LM4040BIM3-3.0
LM4040BIM3-4.1
LM4040BIM3-5.0
LM4040BIM3-8.2
LM4040BIM3-10.0
LM4040BIM3X-2.0
LM4040BIM3X-2.5
LM4040BIM3X-3.0
LM4040BIM3X-4.1
LM4040BIM3X-5.0
LM4040BIM3X-8.2
LM4040BIM3X-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
LM4040BIZ-2.0
LM4040BIZ-2.5
LM4040BIZ-3.0
LM4040BIZ-4.1
LM4040BIZ-5.0
LM4040BIZ-8.2
LM4040BIZ-10.0
MF03A,
Z03A,
MAA05A
±0.5%, 100
ppm/˚C max (C
grade)
LM4040CIM3-2.0
LM4040CIM3-2.5
LM4040CIM3-3.0
LM4040CIM3-4.1
LM4040CIM3-5.0
LM4040CIM3-8.2
LM4040CIM3-10.0
LM4040CIM3X-2.0
LM4040CIM3X-2.5
LM4040CIM3X-3.0
LM4040CIM3X-4.1
LM4040CIM3X-5.0
LM4040CIM3X-8.2
LM4040CIM3X-10.0
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
LM4040CIZ-2.0
LM4040CIZ-2.5
LM4040CIZ-3.0
LM4040CIZ-4.1
LM4040CIZ-5.0
LM4040CIZ-8.2
LM4040CIZ-10.0
MF03A,
Z03A,
MAA05A
±1.0%, 150
ppm/˚C max (D
grade)
LM4040DIM3-2.0
LM4040DIM3-2.5
LM4040DIM3-3.0
LM4040DIM3-4.1
LM4040DIM3-5.0
LM4040DIM3-8.2
LM4040DIM3-10.0
LM4040DIM3X-2.0
LM4040DIM3X-2.5
LM4040DIM3X-3.0
LM4040DIM3X-4.1
LM4040DIM3X-5.0
LM4040DIM3X-8.2
LM4040DIM3X-10.0
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
LM4040DIZ-2.0
LM4040DIZ-2.5
LM4040DIZ-3.0
LM4040DIZ-4.1
LM4040DIZ-5.0
LM4040DIZ-8.2
LM4040DIZ-10.0
MF03A,
Z03A,
MAA05A
±2.0%, 150
ppm/˚C max (E
grade)
LM4040EIM3-2.0
LM4040EIM3-2.5
LM4040EIM3-3.0
LM4040EIM3X-2.0
LM4040EIM3X-2.5
LM4040EIM3X-3.0
LM4040EIM7-2.0
LM4040EIM7-2.5
LM4040EIM7-3.0
LM4040EIM7X-2.0
LM4040EIM7X-2.5
LM4040EIM7X-3.0
LM4040EIZ-2.0
LM4040EIZ-2.5
LM4040EIZ-3.0
MF03A,
Z03A,
MAA05A
LM4040
www.national.com 2
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
±0.5%, 100 ppm/˚C max (C grade) LM4040CEM3-2.0, LM4040CEM3-2.5,
LM4040CEM3-3.0, LM4040CEM3-5.0
±1.0%, 150 ppm/˚C max (D grade) LM4040DEM3-2.0, LM4040DEM3-2.5,
LM4040DEM3-3.0, LM4040DEM3-5.0
±2.0%, 150 ppm/˚C max (E grade) LM4040EEM3-2.0, LM4040EEM3-2.5,
LM4040EEM3-3.0
LM4040
www.national.com3
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
RJA SOT-23 only First Field:
R2A SOT-23 only
RKA SOT-23 only
R4A SOT-23 only R = Reference
R5A SOT-23 only Second Field:
J = 2.048V Voltage Option
2 = 2.500V Voltage Option
R8A SOT-23 only K = 3.000V Voltage Option
R0A SOT-23 only 4 = 4.096V Voltage Option
RJB
R2B 5 = 5.000V Voltage Option
RKB
R4B 8= 8.192V Voltage Option
R5B 0 = 10.000V Voltage Option
R8B SOT-23 only
R0B SOT-23 only Third Field:
RJC
R2C A–E = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
RKC
R4C A = ±0.1%, B = ±0.2%, C = +0.5%, D = ±1.0%, E = ±2.0%
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
LM4040
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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
Power Dissipation (T
A
= 25˚C) (Note 2)
M3 Package 306 mW
Z Package 550 mW
M7 Package 241 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
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 −40˚C ≤T
A
≤+85˚C
Extended Temperature Range −40˚C ≤T
A
≤
+125˚C
Reverse Current
LM4040-2.0 60 µA to 15 mA
LM4040-2.5 60 µA to 15 mA
LM4040-3.0 62 µA to 15 mA
LM4040-4.1 68 µA to 15 mA
LM4040-5.0 74 µA to 15 mA
LM4040-8.2 91 µA to 15 mA
LM4040-10.0 100 µA to 15 mA
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.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
(Limit)
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 2.048 V
Reverse Breakdown Voltage
Tolerance
(Note 6)
I
R
= 100 µA ±2.0 ±4.1 mV (max)
±15 ±17 mV (max)
I
RMIN
Minimum Operating Current 45 µA
60 60 µA (max)
65 65 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient
(Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±100 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note *NO
TARGET FOR FNXref
NS4914*)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 0.8 mV (max)
1.0 1.0 mV (max)
1mA≤I
R
≤15 mA 2.5 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,
I
AC
= 0.1 I
R
0.3 Ω
0.8 0.8 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
LM4040
www.national.com5
LM4040-2.0
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 A and B designate initial Re-
verse Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
(Limit)
(Note 5)
Units
(Limit)
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
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 C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
(Limit)
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
(Limit)
(Note 5)
LM4040EIM7
LM4040EIZ
(Limit)
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 2.048 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
I
R
= 100 µA ±10 ±20 ±41 mV (max)
±23 ±40 ±60 mV (max)
I
RMIN
Minimum Operating
Current
45 µA
60 65 65 µA (max)
65 70 70 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient
(Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note *NO TARGET
FOR FNXref
NS4914*)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1mA≤I
R
≤15 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 0.3 Ω
I
AC
= 0.1 I
R
0.9 1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 100 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 6
LM4040-2.0
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
= 25˚C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CEM3
(Limit)
(Note 5)
LM4040DEM3
(Limit)
(Note 5)
LM4040EEM3
(Limit)
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 2.048 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
I
R
= 100 µA ±10 ±20 ±41 mV (max)
±30 ±50 ±70 mV (max)
I
RMIN
Minimum Operating
Current
45 µA
60 65 65 µA (max)
68 73 73 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient
(Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 7)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1mA≤I
R
≤15 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,
I
AC
= 0.1 I
R
0.3 Ω
0.9 1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-2.5
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)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 2.500 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±2.5 ±5.0 mV (max)
±19 ±21 mV (max)
I
RMIN
Minimum Operating Current 45 µA
60 60 µA (max)
65 65 µA (max)
LM4040
www.national.com7
LM4040-2.5
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 A and B designate initial Re-
verse Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±100 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 0.8 mV (max)
1.0 1.0 mV (max)
1mA≤I
R
≤15 mA 2.5 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,
I
AC
= 0.1 I
R
0.3 Ω
0.8 0.8 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-2.5
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 C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040DIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
LM4040EIM7
LM4040EIZ
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 2.500 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
I
R
= 100 µA ±12 ±25 ±50 mV (max)
±29 ±49 ±74 mV (max)
I
RMIN
Minimum Operating
Current
45 µA
60 65 65 µA (max)
65 70 70 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient(Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
LM4040
www.national.com 8
LM4040-2.5
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
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040DIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
LM4040EIM7
LM4040EIZ
Limits
(Note 5)
Units
(Limit)
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 7)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1mA≤I
R
≤15 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 0.3 Ω
I
AC
= 0.1 I
R
0.9 1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 100 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-2.5
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
= 25˚C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CEM3
Limits
(Note 5)
LM4040DEM3
Limits
(Note 5)
LM4040EEM3
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 2.500 V
Reverse Breakdown
Voltage
Tolerance(Note 6)
I
R
= 100 µA ±12 ±25 ±50 mV (max)
±38 ±63 ±88 mV (max)
I
RMIN
Minimum Operating
Current
45 µA
60 65 65 µA (max)
68 73 73 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 7)
I
RMIN
≤I
R
≤1 mA 0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1mA≤I
R
≤15 mA 2.5 mV
6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
LM4040
www.national.com9
LM4040-2.5
Electrical Characteristics (Extended 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
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CEM3
Limits
(Note 5)
LM4040DEM3
Limits
(Note 5)
LM4040EEM3
Limits
(Note 5)
Units
(Limit)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
0.3 Ω
0.9 1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-3.0
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.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
(Limit)
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 3.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±3.0 ±6.0 mV (max)
±22 ±26 mV (max)
I
RMIN
Minimum Operating Current 47 µA
62 62 µA (max)
67 67 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±100 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.6 mV
0.8 0.8 mV (max)
1.1 1.1 mV (max)
1mA≤I
R
≤15 mA 2.7 mV
6.0 6.0 mV (max)
9.0 9.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
0.4 Ω
0.9 0.9 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 10
LM4040-3.0
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 C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040DIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
LM4040EIM7
LM4040EIZ
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 3.000 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
I
R
= 100 µA ±15 ±30 ±60 mV (max)
±34 ±59 ±89 mV (max)
I
RMIN
Minimum Operating
Current
45 µA
60 65 65 µA (max)
65 70 70 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient(Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 7)
I
RMIN
≤I
R
≤1 mA 0.4 mV
0.8 1.1 1.1 mV (max)
1.1 1.3 1.3 mV (max)
1mA≤I
R
≤15 mA 2.7 mV
6.0 8.0 8.0 mV (max)
9.0 11.0 11.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz 0.4 Ω
I
AC
= 0.1 I
R
0.9 1.2 1.2 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 100 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-3.0
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
= 25˚C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CEM3
Limits
(Note 5)
LM4040DEM3
Limits
(Note 5)
LM4040EEM3
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown
Voltage
I
R
= 100 µA 3.000 V
Reverse Breakdown
Voltage
Tolerance(Note 6)
I
R
= 100 µA ±15 ±30 ±60 mV (max)
±45 ±75 ±105 mV (max)
I
RMIN
Minimum Operating
Current
47 µA
62 67 67 µA (max)
70 75 75 µA (max)
LM4040
www.national.com11
LM4040-3.0
Electrical Characteristics (Extended 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
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CEM3
Limits
(Note 5)
LM4040DEM3
Limits
(Note 5)
LM4040EEM3
Limits
(Note 5)
Units
(Limit)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
I
R
=10mA ±20 ppm/˚C
I
R
=1mA ±15 ±100 ±150 ±150 ppm/˚C (max)
I
R
= 100 µA ±15 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown
Voltage Change with
Operating Current
Change
(Note 7)
I
RMIN
≤I
R
≤1 mA 0.4 mV
0.8 1.1 1.1 mV (max)
1.1 1.3 1.3 mV (max)
1mA≤I
R
≤15 mA 2.7 mV
6.0 8.0 8.0 mV (max)
9.0 11.0 11.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
0.4 Ω
0.9 1.2 1.2 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 35 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040-4.1
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)
LM4040AIM3
LM4040AIZ
Limits
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 4.096 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±4.1 ±8.2 mV (max)
±31 ±35 mV (max)
I
RMIN
Minimum Operating Current 50 µA
68 68 µA (max)
73 73 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient(Note 6)
I
R
=10mA ±30 ppm/˚C
I
R
=1mA ±20 ±100 ±100 ppm/˚C (max)
I
R
= 100 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.5 mV
0.9 0.9 mV (max)
1.2 1.2 mV (max)
1mA≤I
R
≤15 mA 3.0 mV
7.0 7.0 mV (max)
10.0 10.0 mV (max)
LM4040
www.national.com 12
LM4040-4.1
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 A and B designate initial Re-
verse Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
Limits
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.5 Ω
I
AC
= 0.1 I
R
1.0 1.0 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 80 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com13
LM4040-4.1
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 C and D designate initial Re-
verse Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040BIZ
LM4040DIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 4.096 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±20 ±41 mV (max)
±47 ±81 mV (max)
I
RMIN
Minimum Operating Current 50 µA
68 73 µA (max)
73 78 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±30 ppm/˚C
I
R
=1mA ±20 ±100 ±150 ppm/˚C (max)
I
R
= 100 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.5 mV
0.9 1.2 mV (max)
1.2 1.5 mV (max)
1mA≤I
R
≤15 mA 3.0 mV
7.0 9.0 mV (max)
10.0 13.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.5 Ω
I
AC
= 0.1 I
R
1.0 1.3 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 80 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 14
LM4040-5.0
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.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
Limits
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 5.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±5.0 ±10 mV (max)
±38 ±43 mV (max)
I
RMIN
Minimum Operating Current 54 µA
74 74 µA (max)
80 80 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±30 ppm/˚C
I
R
=1mA ±20 ±100 ±100 ppm/˚C (max)
I
R
= 100 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.5 mV
1.0 1.0 mV (max)
1.4 1.4 mV (max)
1mA≤I
R
≤15 mA 3.5 mV
8.0 8.0 mV (max)
12.0 12.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.5 Ω
I
AC
= 0.1 I
R
1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 80 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 100 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com15
LM4040-5.0
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 C and D designate initial Re-
verse Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040BIZ
LM4040DIM7
Limits
(Note 5)
Units
(Limit)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 5.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 100 µA ±25 ±50 mV (max)
±58 ±99 mV (max)
I
RMIN
Minimum Operating Current 54 µA
74 79 µA (max)
80 85 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±30 ppm/˚C
I
R
=1mA ±20 ±100 ±150 ppm/˚C (max)
I
R
= 100 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.5 mV
1.0 1.3 mV (max)
1.4 1.8 mV (max)
1mA≤I
R
≤15 mA 3.5 mV
8.0 10.0 mV (max)
12.0 15.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.5 Ω
I
AC
= 0.1 I
R
1.1 1.5 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 80 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 100 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 16
LM4040-5.0
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
= 25˚C. The grades C and D designate initial Re-
verse Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical LM4040CEM3 LM4040DEM3 Units
Limits Limits (Limit)
(Note 4) (Note 5) (Note 5)
V
R
Reverse Breakdown Voltage I
R
= 100 µA 5.000 V
Reverse Breakdown Voltage
Tolerance(Note 6)
I
R
= 100 µA ±25 ±50 mV (max)
±75 ±125 mV (max)
I
RMIN
Minimum Operating Current 54 µA
74 79 µA (max)
83 88 µA (max)
∆V
R
/∆T Average Reverse
Breakdown Voltage
Temperature Coefficient
(Note 6)
I
R
=10mA ±30 ppm/˚C
I
R
=1mA ±20 ±100 ±150 ppm/˚C (max)
I
R
= 100 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.5 mV
1.0 1.0 mV (max)
1.4 1.8 mV (max)
1mA≤I
R
≤15 mA 3.5 mV
8.0 8.0 mV (max)
12.0 15.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, I
AC
=
0.1 I
R
0.5 Ω
1.1 1.1 Ω(max)
e
N
Wideband Noise I
R
= 100 µA 80 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C
I
R
= 100 µA
120 ppm
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com17
LM4040-8.2
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)
Units
(Limit)
LM4040AIM3 LM4040BIM3
LM4040AIZ LM4040BIZ
Limits Limits
(Note 5) (Note 5)
V
R
Reverse Breakdown Voltage I
R
= 150 µA 8.192 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 150 µA ±8.2 ±16 mV (max)
±61 ±70 mV (max)
I
RMIN
Minimum Operating Current 67 µA
91 91 µA (max)
95 95 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient(Note 6)
I
R
=10mA ±40 ppm/˚C
I
R
=1mA ±20 ±100 ±100 ppm/˚C (max)
I
R
= 150 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.6 mV
1.3 1.3 mV (max)
2.5 2.5 mV (max)
1mA≤I
R
≤15 mA 7.0 mV
10.0 10.0 mV (max)
18.0 18.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.6 Ω
I
AC
= 0.1 I
R
1.5 1.5 Ω(max)
e
N
Wideband Noise I
R
= 150 µA 130 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 150 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 18
LM4040-8.2
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 C and D designate initial Re-
verse Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
(Limit)
LM4040CIM3 LM4040DIM3
LM4040CIZ LM4040DIZ
Limits Limits
(Note 5) (Note 5)
V
R
Reverse Breakdown Voltage I
R
= 150 µA 8.192 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 150 µA ±41 ±82 mV (max)
±94 ±162 mV (max)
I
RMIN
Minimum Operating Current 67 µA
91 96 µA (max)
95 100 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±40 ppm/˚C
I
R
=1mA ±20 ±100 ±150 ppm/˚C (max)
I
R
= 150 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.6 mV
1.3 1.7 mV (max)
2.5 3.0 mV (max)
1mA≤I
R
≤15 mA 7.0 mV
10.0 15.0 mV (max)
18.0 24.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.6 Ω
I
AC
= 0.1 I
R
1.5 1.9 Ω(max)
e
N
Wideband Noise I
R
= 150 µA 130 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 150 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com19
LM4040-10.0
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.
Symbol Parameter Conditions Typical
(Note 4)
Units
(Limit)
LM4040AIM3 LM4040BIM3
LM4040AIZ LM4040BIZ
Limits Limits
(Note 5) (Note 5)
V
R
Reverse Breakdown Voltage I
R
= 150 µA 10.00 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 150 µA ±10 ±20 mV (max)
±75 ±85 mV (max)
I
RMIN
Minimum Operating Current 75 µA
100 100 µA (max)
103 103 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±40 ppm/˚C
I
R
=1mA ±20 ±100 ±100 ppm/˚C (max)
I
R
= 150 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.8 mV
1.5 1.5 mV (max)
3.5 3.5 mV (max)
1mA≤I
R
≤15 mA 8.0 mV
12.0 12.0 mV (max)
23.0 23.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.7 Ω
I
AC
= 0.1 I
R
1.7 1.7 Ω(max)
e
N
Wideband Noise I
R
= 150 µA 180 µV
rms
10 Hz ≤f≤10 kHz
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 150 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com 20
LM4040-10.0
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 C and D designate initial Re-
verse Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
(Limit)
LM4040CIM3 LM4040DIM3
LM4040CIZ LM4040DIZ
Limits Limits
(Note 5) (Note 5)
V
R
Reverse Breakdown Voltage I
R
= 150 µA 10.00 V
Reverse Breakdown Voltage
Tolerance (Note 6)
I
R
= 150 µA ±50 ±100 mV (max)
±115 ±198 mV (max)
I
RMIN
Minimum Operating Current 75 µA
100 110 µA (max)
103 113 µA (max)
∆V
R
/∆T Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
I
R
=10mA ±40 ppm/˚C
I
R
=1mA ±20 ±100 ±150 ppm/˚C (max)
I
R
= 150 µA ±20 ppm/˚C
∆V
R
/∆I
R
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
I
RMIN
≤I
R
≤1 mA 0.8 mV
1.5 2.0 mV (max)
3.5 4.0 mV (max)
1mA≤I
R
≤15 mA 8.0 mV
12.0 18.0 mV (max)
23.0 29.0 mV (max)
Z
R
Reverse Dynamic
Impedance
I
R
= 1 mA, f = 120 Hz, 0.7 Ω
I
AC
= 0.1 I
R
1.7 2.3 Ω(max)
e
N
Wideband Noise I
R
= 150 µA
10 Hz ≤f≤10 kHz 180 µV
rms
∆V
R
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25˚C ±0.1˚C 120 ppm
I
R
= 150 µA
V
HYST
Thermal Hysteresis
(Note 8)
∆T = −40˚C to +125˚C 0.08 %
LM4040
www.national.com21
Electrical Characteristics(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 (junction to
ambient thermal resistance), and TA(ambient temperature). The maximum allowable power dissipation at any temperature is PDmax =(T
Jmax −T
A)/θJA or the
number given in the Absolute Maximum Ratings, whichever is lower. For the LM4040, TJmax = 125˚C, and the typical thermal resistance (θJA), when board mounted,
is 326˚C/W for the SOT-23 package, and 180˚C/W with 0.4" lead length and 170˚C/W with 0.125" lead length for the TO-92 package and 415˚C/W for the SC70
Package.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩresistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 4: Typicals are at TJ= 25˚C and represent most likely parametric norm.
Note 5: Limits are 100% production tested at 25˚C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods.
The limits are used to calculate National’s AOQL.
Note 6: The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance
±[(∆VR/∆T)(max∆T)(VR)]. Where, ∆VR/∆T is the VRtemperature coefficient, max∆T is the maximum difference in temperature from the reference point of 25˚C to
TMIN or TMAX, and VRis the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range where
max∆T = 65˚C is shown below:
A-grade: ±0.75% = ±0.1% ±100 ppm/˚C x 65˚C
B-grade: ±0.85% = ±0.2% ±100 ppm/˚C x 65˚C
C-grade: ±1.15% = ±0.5% ±100 ppm/˚C x 65˚C
D-grade: ±1.98% = ±1.0% ±150 ppm/˚C x 65˚C
E-grade: ±2.98% = ±2.0% ±150 ppm/˚C x 65˚C
The total over-temperature tolerance for the different grades in the exteded temperature range where max ∆T = 100 ˚C is shown below:
C-grade: ±1.5% = ±0.5% ±100 ppm/˚C x 100˚C
D-grade: ±2.5% = ±1.0% ±150 ppm/˚C x 100˚C
E-grade: ±3.5% = ±2.0% ±150 ppm/˚C x 100˚C
Therefore, as an example, the A-grade LM4040-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V x 0.75% = ±19 mV.
Note 7: Load regulation is measured on pulse basis from no load to the specified load current. Output changes due to die temperature change must be taken into
account separately.
Note 8: Thermal hysteresis is defined as the difference in voltage measured at +25˚C after cycling to temperature -40˚C and the 25˚C measurement after cycling
to temperature +125˚C.
LM4040
www.national.com 22
Typical Performance Characteristics
Temperature Drift for Different
Average Temperature Coefficient
Output Impedance vs Frequency
01132304 01132310
Output Impedance vs Frequency Reverse Characteristics and
Minimum Operating Current
01132311 01132312
Noise Voltage vs Frequency
01132313
LM4040
www.national.com23
Start-Up Characteristics
LM4040-2.5 R
S
= 30k
01132305
01132307
LM4040-5.0 R
S
= 30k LM4040-10.0 R
S
= 30k
01132308 01132309
Functional Block Diagram
01132314
LM4040
www.national.com 24
Applications Information
The LM4040 is a precision micro-power curvature-corrected
bandgap shunt voltage reference. For space critical applica-
tions, the LM4040 is available in the sub-miniature SOT-23
and SC70 surface-mount package. The LM4040 has been
designed for stable operation without the need of an external
capacitor connected between the “+” pin and the “−” pin. If,
however, a bypass capacitor is used, the LM4040 remains
stable. Reducing design effort is the availability of several
fixed reverse breakdown voltages: 2.048V, 2.500V, 3.000V,
4.096V, 5.000V, 6.000, 8.192V, and 10.000V. The minimum
operating current increases from 60 µA for the LM4040-
2.048 and LM4040-2.5 to 100 µA for the LM4040-10.0. All
versions have a maximum operating current of 15 mA.
LM4040s in the SOT-23 packages have a parasitic Schottky
diode between pin 2 (−) and pin 3 (Die attach interface
contact). Therefore, pin 3 of the SOT-23 package must be
left floating or connected to pin 2.
LM4040s in the SC70 have a parasitic Schottky diode be-
tween pin 1 (−) and pin 2 (Die attach interface contact).
Therefore, pin 2 must be left floating or connected to pin1.
The 4.096V version allows single +5V 12-bit ADCs or DACs
to operate with an LSB equal to 1 mV. For 12-bit ADCs or
DACs that operate on supplies of 10V or greater, the 8.192V
version gives 2 mV per LSB.
The typical thermal hysteresis specification is defined as the
change in +25˚C voltage measured after thermal cycling.
The device is thermal cycled to temperature -40˚C and then
measured at 25˚C. Next the device is thermal cycled to
temperature +125˚C and again measured at 25˚C. The re-
sulting V
OUT
delta shift between the 25˚C measurements is
thermal hysteresis. Thermal hysteresis is common in preci-
sion references and is induced by thermal-mechanical pack-
age stress. Changes in environmental storage temperature,
operating temperature and board mounting temperature are
all factors that can contribute to thermal hysteresis.
In a conventional shunt regulator application (Figure 1),an
external series resistor (R
S
) is connected between the sup-
ply voltage and the LM4040. R
S
determines the current that
flows through the load (I
L
) and the LM4040 (I
Q
). Since load
current and supply voltage may vary, R
S
should be small
enough to supply at least the minimum acceptable I
Q
to the
LM4040 even when the supply voltage is at its minimum and
the load current is at its maximum value. When the supply
voltage is at its maximum and I
L
is at its minimum, R
S
should
be large enough so that the current flowing through the
LM4040 is less than 15 mA.
R
S
is determined by the supply voltage, (V
S
), the load and
operating current, (I
L
and I
Q
), and the LM4040’s reverse
breakdown voltage, V
R
.
Typical Applications
01132315
FIGURE 1. Shunt Regulator
LM4040
www.national.com25
Typical Applications (Continued)
01132316
**Ceramic monolithic
*Tantalum
FIGURE 2. LM4040-4.1’s Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB
LM4040
www.national.com 26
Typical Applications (Continued)
01132317
FIGURE 3. Bounded amplifier reduces saturation-induced delays and can prevent succeeding stage damage.
Nominal clamping voltage is ±11.5V (LM4040’s reverse breakdown voltage +2 diode V
F
).
01132318
FIGURE 4. Protecting Op Amp input. The bounding voltage is ±4V with the LM4040-2.5
(LM4040’s reverse breakdown voltage + 3 diode V
F
).
LM4040
www.national.com27
Typical Applications (Continued)
01132319
FIGURE 5. Precision ±4.096V Reference
01132321
01132322
FIGURE 6. Precision 1 µA to 1 mA Current Sources
LM4040
www.national.com 28
Physical Dimensions inches (millimeters)
unless otherwise noted
Plastic Surface Mount Package (M3)
NS Package Number MF03A
(JEDEC Registration TO-236AB)
Plastic Package (Z)
NS Package Number Z03A
LM4040
www.national.com29
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Molded Package (SC70)
NS Package Number MAA05A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Email: support@nsc.com
National Semiconductor
Europe
Fax: +49 (0) 180-530 85 86
Email: europe.support@nsc.com
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Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
www.national.com
LM4040 Precision Micropower Shunt Voltage Reference
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
