LM4040-N/LM4040Q-N
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 ef-
fort 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 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.
Features
●2.5V/SOT-23 AEC Q-100 Grades 1 and 3 available
●Small packages: SOT-23, TO-92 and SC70
●No output capacitor required
●Tolerates capacitive loads
●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)
■ Output voltage tolerance
(A grade, 25°C) ±0.1% (max)
■ Low output noise
(10 Hz to 10 kHz) 35 μVrms(typ)
■ Wide operating current range 60 μA to 15 mA
■ Industrial temperature range −40°C to +85°C
■ Extended temperature range −40°C to +125°C
■ Low temperature coefficient 100 ppm/°C (max)
Applications
●Portable, Battery-Powered Equipment
●Data Acquisition Systems
●Instrumentation
●Process Control
●Energy Management
●Product Testing
●Automotive
●Precision Audio Components
Connection Diagrams
SOT-23
1132301
*This pin must be left floating or connected to pin 2.
Top View
See NS Package Number MF03A
(JEDEC Registration TO-236AB)
TO-92
1132303
Bottom View
See NS Package Number Z03A
SC70
1132330
*This pin must be left floating or connected to pin 1.
Top View
See NS Package Number MAA05A
PRODUCTION DATA information is current as of
publication date. Products conform to specifications per
the terms of the Texas Instruments standard warranty.
Production processing does not necessarily include
testing of all parameters.
11323 SNOS633G Copyright © 1999-2012, Texas Instruments Incorporated
Ordering Information for Industrial (I) and Extended (E) Temperature Grades
VR Tolerance at
25°C and Average
VR Temperature
Coefficient
Package
SOT-23
(MF03A)
SC70
(MAA05A)
TO-92
(Z03A)
Reel of 1000 Units Reel of 3000 Units Reel of 1000 Units Reel of 3000 Units Box of 1800 Units
±0.1%
100 ppm/°C max
−40°C to +85°C
(A grade)
(I temperature)
LM4040AIM3-2.0
LM4040AIM3-2.5
LM4040AIM3-3.0
LM4040AIM3-4.1
LM4040AIM3-5.0
—
LM4040AIM3-10.0
LM4040AIM3X-2.0
LM4040AIM3X-2.5
LM4040AIM3X-3.0
LM4040AIM3X-4.1
LM4040AIM3X-5.0
—
LM4040AIM3X-10.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LM4040AIZ-2.5
—
LM4040AIZ-4.1
LM4040AIZ-5.0
—
LM4040AIZ-10.0
±0.2%
100 ppm/°C max
−40°C to +85°C
(B grade)
(I temperature)
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-10.0
LM4040BIM7-2.0
LM4040BIM7-2.5
—
—
LM4040BIM7-5.0
—
—
—
LM4040BIM7X-2.5
—
—
—
—
—
—
LM4040BIZ-2.5
—
LM4040BIZ-4.1
LM4040BIZ-5.0
—
LM4040BIZ-10.0
±0.5%
100 ppm/°C max
−40°C to +125°C
(C grade)
(E temperature)
LM4040CEM3-2.5
LM4040CEM3-3.0
—
LM4040CEM3-5.0
—
LM4040CEM3X-3.0
—
LM4040CEM3X-5.0
—
—
—
—
—
—
—
—
—
—
—
—
±0.5%
100 ppm/°C max
−40°C to +85°C
(C grade)
(I temperature)
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-10.0
LM4040CIM7-2.0
LM4040CIM7-2.5
—
—
—
—
—
—
LM4040CIM7X-2.5
—
—
—
—
—
—
LM4040CIZ-2.5
—
LM4040CIZ-4.1
LM4040CIZ-5.0
—
LM4040CIZ-10.0
±1.0%
150 ppm/°C max
−40°C to +125°C
(D grade)
(E temperature)
LM4040DEM3-2.0
LM4040DEM3-2.5
LM4040DEM3-3.0
—
LM4040DEM3-5.0
LM4040DEM3X-2.0
LM4040DEM3X-2.5
LM4040DEM3X-3.0
—
LM4040DEM3X-5.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
±1.0%
150 ppm/°C max
−40°C to +85°C
(D grade)
(I temperature)
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-10.0
LM4040DIM7-2.0
LM4040DIM7-2.5
—
—
LM4040DIM7-5.0
—
—
—
—
—
—
—
—
—
—
LM4040DIZ-2.5
—
LM4040DIZ-4.1
LM4040DIZ-5.0
—
LM4040DIZ-10.0
±2.0%
150 ppm/°C max
−40°C to +125°C
(E grade)
(E temperature)
—
LM4040EEM3-2.5
LM4040EEM3-3.0
—
LM4040EEM3X-2.5
LM4040EEM3X-3.0
—
—
—
—
—
—
—
—
—
±2.0%
150 ppm/°C max
−40°C to +85°C
(E grade)
(I temperature)
—
LM4040EIM3-2.5
LM4040EIM3-3.0
—
LM4040EIM3X-2.5
LM4040EIM3X-3.0
LM4040EIM7–2.0
—
—
—
—
—
—
—
—
LM4040-N/LM4040Q-N
2 Copyright © 1999-2012, Texas Instruments Incorporated
Ordering Information for Automotive AEC Q-100 (Q) Grade 1 and Grade 3
VR Tolerance at 25°C
and Average VR
Temperature
Coefficient
Temperature
Range
(TJ)
Reel of 1000 Units Reel of 3000 Units Package
±0.1%
100 ppm/°C max
(A grade)
−40 °C to +85°C
AEC Grade 3
—
LM4040QAIM3-2.5
—
—
LM4040QAIM3X2.5
—
SOT-23
(MF03A)
±0.2%
100 ppm/°C max
(B grade)
−40 °C to +85°C
AEC Grade 3
—
LM4040QBIM3-2.5
—
—
LM4040QBIM3X2.5
—
SOT-23
(MF03A)
±0.5%
100 ppm/°C max
(C grade)
−40 °C to +125°C
AEC Grade 1
—
LM4040QCEM3-2.5
—
—
—
—
SOT-23
(MF03A)
−40 °C to +85°C
AEC Grade 3
—
LM4040QCIM3-2.5
—
—
LM4040QCIM3X2.5
—
SOT-23
(MF03A)
±1.0%
150 ppm/°C max
(D grade)
−40 °C to +125°C
AEC Grade 1
—
LM4040QDEM3-2.5
—
—
—
—
SOT-23
(MF03A)
−40 °C to +85°C
AEC Grade 3
—
LM4040QDIM3-2.5
—
—
LM4040QDIM3X-2.5
—
SOT-23
(MF03A)
±2.0%
150 ppm/°C max
(E grade)
−40 °C to +125°C
AEC Grade 1
—
LM4040QEEM3-2.5
—
—
—
—
SOT-23
(MF03A)
−40 °C to +85°C
AEC Grade 3
—
LM4040QEIM3-2.5
—
—
LM4040QEIM3X2.5
—
SOT-23
(MF03A)
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 3
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.
First Field:
R = Reference
Second Field: Voltage Option
J = 2.048V Voltage Option
2 = 2.500V Voltage Option
K = 3.000V Voltage Option
4 = 4.096V Voltage Option
5 = 5.000V Voltage Option
8 = 8.192V Voltage Option
0 = 10.000V Voltage Option
Third Field: Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
A = ±0.1%
B = ±0.2%
C = +0.5%
D = ±1.0%
E = ±2.0%
Part Marking Field Definition
RJA (SOT-23 only) Reference, 2.048V, ±0.1%
R2A (SOT-23 only) Reference, 2.500V, ±0.1%
RKA (SOT-23 only Reference, 3.000V, ±0.1%
R4A (SOT-23 only) Reference, 4.096V, ±0.1%
R5A (SOT-23 only) Reference, 5.000V, ±0.1%
R8A (SOT-23 only) Reference, 8.192V, ±0.1%
R0A (SOT-23 only) Reference, 10.000V, ±0.1%
RJB Reference, 2.048V, ±0.2%
R2B Reference, 2.500V, ±0.2%
RKB Reference, 3.000V, ±0.2%
R4B Reference, 4.096V, ±0.2%
R5B Reference, 5.000V, ±0.2%
R8B (SOT-23 only) Reference, 8.192V, ±0.2%
R0B (SOT-23 only) Reference, 10.000V, ±0.2%
RJC Reference, 2.048V, ±0.5%
R2C Reference, 2.500V, ±0.5%
RKC Reference, 3.000V, ±0.5%
R4C Reference, 4.096V, ±0.5%
R5C Reference, 5.000V, ±0.5%
R8C (SOT-23 only) Reference, 8.192V, ±0.5%
R0C (SOT-23 only) Reference, 10.000V, ±0.5%
RJD Reference, 2.048V, ±1.0%
R2D Reference, 2.500V, ±1.0%
RKD Reference, 3.000V, ±1.0%
R4D Reference, 4.096V, ±1.0%
R5D Reference, 5.000V, ±1.0%
R8D (SOT-23 only) Reference, 8.192V, ±1.0%
R0D (SOT-23 only) Reference, 10.000V, ±1.0%
RJE Reference, 2.048V, ±2.0%
R2E Reference, 2.500V, ±2.0%
RKE Reference, 3.000V, ±2.0%
LM4040-N/LM4040Q-N
4 Copyright © 1999-2012, Texas Instruments Incorporated
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for
availability and specifications.
Reverse Current 20 mA
Forward Current 10 mA
Power Dissipation (TA = 25°C) (Note 2)
SOT-23 (M3) Package 306 mW
TO-92 (Z) Package 550 mW
SC-70 (M7) Package 241 mW
Storage Temperature −65°C to +150°C
Soldering Temperature (Note 9)
SOT-23 (M3) Package
Peak Reflow (30 sec) +260°C
TO-92 (Z) Package
Soldering (10 sec) +260°C
SC-70 (M7) Package
Peak Reflow (30 sec) +260°C
ESD Susceptibility
Human Body Model (Note 3) 2 kV
Machine Model (Note 3) 200V
Operating Ratings (Note 1, Note 2)
Temperature Range (Tmin ≤ TA ≤ Tmax)
Industrial Temperature Range −40°C ≤ TA ≤ +85°C
Extended Temperature Range −40°C ≤ TA ≤ +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
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
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
VR
Reverse Breakdown Voltage IR = 100 μA2.048 V
Reverse Breakdown Voltage
Tolerance
(Note 6)
IR = 100 μA
±2.0 ±4.1 mV (max)
±15 ±17 mV (max)
IRMIN Minimum Operating Current
45 μA
60 60 μA (max)
65 65 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±100 ppm/°C (max)
IR = 100 μA±15 ppm/°C
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 5
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3
LM4040AIZ
—
Limits
(Note 5)
LM4040BIM3
LM4040BIZ
LM4040BIM7
Limits
(Note 5)
Units
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 0.8 mV (max)
1.0 1.0 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 6.0 mV (max)
8.0 8.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3 Ω
0.8 0.8 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-2.0 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
—
LM4040EIZ
LM4040EIM7
Limits
(Note 5)
Units
VR
Reverse Breakdown
Voltage IR = 100 μA2.048 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±10 ±20 ±41 mV (max)
±23 ±40 ±60 mV (max)
IRMIN
Minimum Operating
Current
45 μA
60 65 65 μA (max)
65 70 70 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz
IAC = 0.1 IR
0.3 Ω
0.9 1.1 1.1 Ω(max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
LM4040-N/LM4040Q-N
6 Copyright © 1999-2012, Texas Instruments Incorporated
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
—
LM4040EIZ
LM4040EIM7
Limits
(Note 5)
Units
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-2.0 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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
VR
Reverse Breakdown
Voltage IR = 100 μA2.048 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±10 ±20 ±41 mV (max)
±30 ±50 ±70 mV (max)
IRMIN
Minimum Operating
Current
45 μA
60 65 65 μA (max)
68 73 73 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3 Ω
0.9 1.1 1.1 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 7
LM4040-2.5 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I' (AEC Grade 3)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040AIM3 LM4040BIM3
Units
LM4040AIZ LM4040BIZ
—LM4040BIM7
LM4040QAIM3 LM4040QBIM3
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown Voltage IR = 100 μA2.500 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±2.5 ±5.0 mV (max)
±19 ±21 mV (max)
IRMIN Minimum Operating Current
45 μA
60 60 μA (max)
65 65 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±100 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 0.8 mV (max)
1.0 1.0 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 6.0 mV (max)
8.0 8.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3 Ω
0.8 0.8 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
8 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-2.5 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'I' (AEC Grade 3)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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)
LM4040CIZ LM4040DIZ LM4040EIZ
Units
LM4040CIM3 LM4040DIM3 LM4040EIM3
LM4040CIM7 LM4040DIM7 LM4040EIM7
LM4040QCIM3 LM4040QDIM3 LM4040QEIM3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown
Voltage IR = 100 μA2.500 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±12 ±25 ±50 mV (max)
±29 ±49 ±74 mV (max)
IRMIN
Minimum Operating
Current
45 μA
60 65 65 μA (max)
65 70 70 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz
IAC = 0.1 IR
0.3 Ω
0.9 1.1 1.1 Ω(max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT= −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 9
LM4040-2.5 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E' (AEC Grade 1)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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 LM4040DEM3 LM4040EEM3
Units
LM4040QCEM3 LM4040QDEM3 LM4040QEEM3
Limits
(Note 5)
Limits
(Note 5)
Limits
(Note 5)
VR
Reverse Breakdown
Voltage IR = 100 μA2.500 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±12 ±25 ±50 mV (max)
±38 ±63 ±88 mV (max)
IRMIN
Minimum Operating
Current
45 μA
60 65 65 μA (max)
68 73 73 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.3 mV
0.8 1.0 1.0 mV (max)
1.0 1.2 1.2 mV (max)
1 mA ≤ IR ≤ 15 mA
2.5 mV
6.0 8.0 8.0 mV (max)
8.0 10.0 10.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.3 Ω
0.9 1.1 1.1 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT= −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
10 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-3.0 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
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
VR
Reverse Breakdown Voltage IR = 100 μA3.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±3.0 ±6.0 mV (max)
±22 ±26 mV (max)
IRMIN Minimum Operating Current
47 μA
62 62 μA (max)
67 67 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±100 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.6 mV
0.8 0.8 mV (max)
1.1 1.1 mV (max)
1 mA ≤ IR ≤ 15 mA
2.7 mV
6.0 6.0 mV (max)
9.0 9.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.4 Ω
0.9 0.9 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 11
LM4040-3.0 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
LM4040EIM7
LM4040EIZ
—
Limits
(Note 5)
Units
VR
Reverse Breakdown
Voltage
IR = 100 μA3.000 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±15 ±30 ±60 mV (max)
±34 ±59 ±89 mV (max)
IRMIN
Minimum Operating
Current
45 μA
60 65 65 μA (max)
65 70 70 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.4 mV
0.8 1.1 1.1 mV (max)
1.1 1.3 1.3 mV (max)
1 mA ≤ IR ≤ 15 mA
2.7 mV
6.0 8.0 8.0 mV (max)
9.0 11.0 11.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz
IAC = 0.1 IR
0.4 Ω
0.9 1.2 1.2 Ω(max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
12 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-3.0 Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 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
VR
Reverse Breakdown
Voltage IR = 100 μA3.000 V
Reverse Breakdown
Voltage Tolerance
(Note 6)
IR = 100 μA
±15 ±30 ±60 mV (max)
±45 ±75 ±105 mV (max)
IRMIN
Minimum Operating
Current
47 μA
62 67 67 μA (max)
70 75 75 μA (max)
ΔVR/ΔT
Average Reverse
Breakdown Voltage
Temperature
Coefficient (Note 6)
IR = 10 mA ±20 ppm/°C
IR = 1 mA ±15 ±100 ±150 ±150 ppm/°C (max)
IR = 100 μA±15 ppm/°C
ΔVR/ΔIR
Reverse Breakdown
Voltage Change with
Operating Current
Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.4 mV
0.8 1.1 1.1 mV (max)
1.1 1.3 1.3 mV (max)
1 mA ≤ IR ≤ 15 mA
2.7 mV
6.0 8.0 8.0 mV (max)
9.0 11.0 11.0 mV (max)
ZR
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.4 Ω
0.9 1.2 1.2 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 35 μVrms
ΔVR
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 13
LM4040-4.1 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
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
VR
Reverse Breakdown Voltage IR = 100 μA4.096 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±4.1 ±8.2 mV (max)
±31 ±35 mV (max)
IRMIN Minimum Operating Current
50 μA
68 68 μA (max)
73 73 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±30 ppm/°C
IR = 1 mA ±20 ±100 ±100 ppm/°C (max)
IR = 100 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.5 mV
0.9 0.9 mV (max)
1.2 1.2 mV (max)
1 mA ≤ IR ≤ 15 mA
3.0 mV
7.0 7.0 mV (max)
10.0 10.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5 Ω
1.0 1.0 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 80 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
14 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-4.1 Electrical Characteristics
VR Tolerance Grades 'C' and 'D'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C and D designate initial Reverse
Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
Units
VR
Reverse Breakdown Voltage IR = 100 μA4.096 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±20 ±41 mV (max)
±47 ±81 mV (max)
IRMIN Minimum Operating Current
50 μA
68 73 μA (max)
73 78 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±30 ppm/°C
IR = 1 mA ±20 ±100 ±150 ppm/°C (max)
IR = 100 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.5 mV
0.9 1.2 mV (max)
1.2 1.5 mV (max)
1 mA ≤ IR ≤ 15 mA
3.0 mV
7.0 9.0 mV (max)
10.0 13.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5 Ω
1.0 1.3 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 80 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 15
LM4040-5.0 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
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
VR
Reverse Breakdown Voltage IR = 100 μA5.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±5.0 ±10 mV (max)
±38 ±43 mV (max)
IRMIN Minimum Operating Current
54 μA
74 74 μA (max)
80 80 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±30 ppm/°C
IR = 1 mA ±20 ±100 ±100 ppm/°C (max)
IR = 100 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.5 mV
1.0 1.0 mV (max)
1.4 1.4 mV (max)
1 mA ≤ IR ≤ 15 mA
3.5 mV
8.0 8.0 mV (max)
12.0 12.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5 Ω
1.1 1.1 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 80 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
16 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-5.0 Electrical Characteristics
VR Tolerance Grades 'C' and 'D'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C and D designate initial Reverse
Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
LM4040CIM3
LM4040CIZ
LM4040CIM7
Limits
(Note 5)
LM4040DIM3
LM4040DIZ
LM4040DIM7
Limits
(Note 5)
Units
VR
Reverse Breakdown Voltage IR = 100 μA5.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±25 ±50 mV (max)
±58 ±99 mV (max)
IRMIN Minimum Operating Current
54 μA
74 79 μA (max)
80 85 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±30 ppm/°C
IR = 1 mA ±20 ±100 ±150 ppm/°C (max)
IR = 100 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.5 mV
1.0 1.3 mV (max)
1.4 1.8 mV (max)
1 mA ≤ IR ≤ 15 mA
3.5 mV
8.0 10.0 mV (max)
12.0 15.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5 Ω
1.1 1.5 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 80 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 17
LM4040-5.0 Electrical Characteristics
VR Tolerance Grades 'C' and 'D'; Temperature Grade 'E'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C and D designate initial Reverse
Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions
Typical LM4040CEM3 LM4040DEM3
Units
Limits Limits
(Note 5) (Note 5)
VR
Reverse Breakdown Voltage IR = 100 μA5.000 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 100 μA ±25 ±50 mV (max)
±75 ±125 mV (max)
IRMIN Minimum Operating Current
54 μA
74 79 μA (max)
83 88 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±30 ppm/°C
IR = 1 mA ±20 ±100 ±150 ppm/°C (max)
IR = 100 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.5 mV
1.0 1.0 mV (max)
1.4 1.8 mV (max)
1 mA ≤ IR ≤ 15 mA
3.5 mV
8.0 8.0 mV (max)
12.0 15.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.5 Ω
1.1 1.1 Ω (max)
eNWideband Noise IR = 100 μA
10 Hz ≤ f ≤ 10 kHz 80 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
18 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-8.2 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
LM4040AIM3 LM4040BIM3
LM4040AIZ LM4040BIZ
Limits Limits
(Note 5) (Note 5)
VR
Reverse Breakdown Voltage IR = 150 μA8.192 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 150 μA ±8.2 ±16 mV (max)
±61 ±70 mV (max)
IRMIN Minimum Operating Current
67 μA
91 91 μA (max)
95 95 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±40 ppm/°C
IR = 1 mA ±20 ±100 ±100 ppm/°C (max)
IR = 150 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.6 mV
1.3 1.3 mV (max)
2.5 2.5 mV (max)
1 mA ≤ IR ≤ 15 mA
7.0 mV
10.0 10.0 mV (max)
18.0 18.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.6 Ω
1.5 1.5 Ω (max)
eNWideband Noise IR = 150 μA
10 Hz ≤ f ≤ 10 kHz 130 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 19
LM4040-8.2 Electrical Characteristics
VR Tolerance Grades 'C' and 'D'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C and D designate initial Reverse
Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
LM4040CIM3 LM4040DIM3
LM4040CIZ LM4040DIZ
Limits Limits
(Note 5) (Note 5)
VR
Reverse Breakdown Voltage IR = 150 μA8.192 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 150 μA ±41 ±82 mV (max)
±94 ±162 mV (max)
IRMIN Minimum Operating Current
67 μA
91 96 μA (max)
95 100 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±40 ppm/°C
IR = 1 mA ±20 ±100 ±150 ppm/°C (max)
IR = 150 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.6 mV
1.3 1.7 mV (max)
2.5 3.0 mV (max)
1 mA ≤ IR ≤ 15 mA
7.0 mV
10.0 15.0 mV (max)
18.0 24.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.6 Ω
1.5 1.9 Ω (max)
eNWideband Noise IR = 150 μA
10 Hz ≤ f ≤ 10 kHz 130 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
20 Copyright © 1999-2012, Texas Instruments Incorporated
LM4040-10.0 Electrical Characteristics
VR Tolerance Grades 'A' and 'B'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades A and B designate initial Reverse
Breakdown Voltage tolerances of ±0.1% and ±0.2%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
LM4040AIM3 LM4040BIM3
LM4040AIZ LM4040BIZ
Limits Limits
(Note 5) (Note 5)
VR
Reverse Breakdown Voltage IR = 150 μA10.00 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 150 μA ±10 ±20 mV (max)
±75 ±85 mV (max)
IRMIN Minimum Operating Current
75 μA
100 100 μA (max)
103 103 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±40 ppm/°C
IR = 1 mA ±20 ±100 ±100 ppm/°C (max)
IR = 150 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.8 mV
1.5 1.5 mV (max)
3.5 3.5 mV (max)
1 mA ≤ IR ≤ 15 mA
8.0 mV
12.0 12.0 mV (max)
23.0 23.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.7 Ω
1.7 1.7 Ω (max)
eNWideband Noise IR = 150 μA
10 Hz ≤ f ≤ 10 kHz 180 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 21
LM4040-10.0 Electrical Characteristics
VR Tolerance Grades 'C' and 'D'; Temperature Grade 'I'
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C and D designate initial Reverse
Breakdown Voltage tolerances of ±0.5% and ±1.0%, respectively.
Symbol Parameter Conditions Typical
(Note 4)
Units
LM4040CIM3 LM4040DIM3
LM4040CIZ LM4040DIZ
Limits Limits
(Note 5) (Note 5)
VR
Reverse Breakdown Voltage IR = 150 μA10.00 V
Reverse Breakdown Voltage
Tolerance (Note 6)IR = 150 μA ±50 ±100 mV (max)
±115 ±198 mV (max)
IRMIN Minimum Operating Current
75 μA
100 110 μA (max)
103 113 μA (max)
ΔVR/ΔT
Average Reverse Breakdown
Voltage Temperature
Coefficient (Note 6)
IR = 10 mA ±40 ppm/°C
IR = 1 mA ±20 ±100 ±150 ppm/°C (max)
IR = 150 μA±20 ppm/°C
ΔVR/ΔIR
Reverse Breakdown Voltage
Change with Operating
Current Change (Note 7)
IRMIN ≤ IR ≤ 1 mA
0.8 mV
1.5 2.0 mV (max)
3.5 4.0 mV (max)
1 mA ≤ IR ≤ 15 mA
8.0 mV
12.0 18.0 mV (max)
23.0 29.0 mV (max)
ZRReverse Dynamic Impedance IR = 1 mA, f = 120 Hz,
IAC = 0.1 IR
0.7 Ω
1.7 2.3 Ω (max)
eNWideband Noise IR = 150 μA
10 Hz ≤ f ≤ 10 kHz 180 μVrms
ΔVR
Reverse Breakdown Voltage
Long Term Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 150 μA
120 ppm
VHYST
Thermal Hysteresis
(Note 8)ΔT = −40°C to +125°C 0.08 %
LM4040-N/LM4040Q-N
22 Copyright © 1999-2012, Texas Instruments Incorporated
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 = (TJmax − TA)/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 kΩ resistor 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 ±[(ΔVR/ΔT)(maxΔT)(VR)]. Where, ΔVR/ΔT is the VR temperature coefficient, maxΔT is the maximum difference in temperature from the reference point
of 25°C to T MIN or TMAX, and VR is the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range
where maxΔT = 65°C is shown below:
A-grade: ±0.75% = ±0.1% ±100 ppm/°C × 65°C
B-grade: ±0.85% = ±0.2% ±100 ppm/°C × 65°C
C-grade: ±1.15% = ±0.5% ±100 ppm/°C × 65°C
D-grade: ±1.98% = ±1.0% ±150 ppm/°C × 65°C
E-grade: ±2.98% = ±2.0% ±150 ppm/°C × 65°C
The total over-temperature tolerance for the different grades in the exteded temperature range where max ΔT = 100 °C is shown below:
C-grade: ±1.5% = ±0.5% ±100 ppm/°C × 100°C
D-grade: ±2.5% = ±1.0% ±150 ppm/°C × 100°C
E-grade: ±3.5% = ±2.0% ±150 ppm/°C × 100°C
Therefore, as an example, the A-grade LM4040-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V × 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.
Note 9: Peak Reflow Temperatures for Surface Mount devices are defined in “Absolute Maximum Ratings for Soldering”, Literature Number: SNOA549C
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 23
Typical Performance Characteristics
Temperature Drift for Different
Average Temperature Coefficient
1132304
Output Impedance vs Frequency
1132310
Output Impedance vs Frequency
1132311
Reverse Characteristics and
Minimum Operating Current
1132312
Noise Voltage vs Frequency
1132313
LM4040-N/LM4040Q-N
24 Copyright © 1999-2012, Texas Instruments Incorporated
Start-Up Characteristics
1132305
LM4040-2.5 RS = 30k
1132307
LM4040-5.0 RS = 30k
1132308
LM4040-10.0 RS = 30k
1132309
Functional Block Diagram
1132314
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 25
Applications Information
The LM4040 is a precision micro-power curvature-corrected bandgap shunt voltage reference. For space critical applications, 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 between 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 resulting VOUT delta shift between the 25°C measurements is thermal hysteresis. Thermal hysteresis
is common in precision references and is induced by thermal-mechanical package 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 (RS) is connected between the supply voltage
and the LM4040. RS determines the current that flows through the load (IL) and the LM4040 (IQ). Since load current and supply
voltage may vary, RS should be small enough to supply at least the minimum acceptable IQ 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 IL is at its
minimum, RS should be large enough so that the current flowing through the LM4040 is less than 15 mA.
RS is determined by the supply voltage, (VS), the load and operating current, (IL and IQ), and the LM4040's reverse breakdown
voltage, VR.
Typical Applications
1132315
FIGURE 1. Shunt Regulator
LM4040-N/LM4040Q-N
26 Copyright © 1999-2012, Texas Instruments Incorporated
1132316
**Ceramic monolithic
*Tantalum
FIGURE 2. LM4040-4.1's Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 27
1132317
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 VF).
1132318
FIGURE 4. Protecting Op Amp input. The bounding voltage is ±4V with the LM4040-2.5
(LM4040's reverse breakdown voltage + 3 diode VF).
LM4040-N/LM4040Q-N
28 Copyright © 1999-2012, Texas Instruments Incorporated
1132319
FIGURE 5. Precision ±4.096V Reference
1132321
1132322
FIGURE 6. Precision 1 μA to 1 mA Current Sources
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 29
Physical Dimensions inches (millimeters) unless otherwise noted
Plastic Surface Mount Package (M3)
NS Package Number MF03A
(JEDEC Registration TO-236AB)
LM4040-N/LM4040Q-N
30 Copyright © 1999-2012, Texas Instruments Incorporated
Plastic Package (Z)
NS Package Number Z03A
Molded Package (SC70)
NS Package Number MAA05A
LM4040-N/LM4040Q-N
Copyright © 1999-2012, Texas Instruments Incorporated 31
Notes
Copyright © 1999-2012, Texas Instruments
Incorporated
