Texas Instruments LM4040A User manual

LM4040
IZ+ IL
IL
IZ
VS
VZ
RS
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
LM4040 Precision Micropower Shunt Voltage Reference
1
1 Features
1• Fixed Output Voltages of 2.048 V, 2.5 V, 3 V,
4.096 V, 5 V, 8.192 V, and 10 V
• Tight Output Tolerances and Low Temperature
Coefficient
– Max 0.1%, 100 ppm/°C – A Grade
– Max 0.2%, 100 ppm/°C – B Grade
– Max 0.5%, 100 ppm/°C – C Grade
– Max 1.0%, 150 ppm/°C – D Grade
• Low Output Noise: 35 μVRMS Typ
• Wide Operating Current Range: 45 μA Typ to 15
mA
• Stable With All Capacitive Loads; No Output
Capacitor Required
• Available in Extended Temperature Range: –40°C
to 125°C
2 Applications
• Data-Acquisition Systems
• Power Supplies and Power-Supply Monitors
• Instrumentation and Test Equipment
• Process Controls
• Precision Audio
• Automotive Electronics
• Energy Management
• Battery-Powered Equipment
3 Description
The LM4040 series of shunt voltage references are
versatile, easy-to-use references that cater to a vast
array of applications. The 2-pin fixed-output device
requires no external capacitors for operation and is
stable with all capacitive loads. Additionally, the
reference offers low dynamic impedance, low noise,
and low temperature coefficient to ensure a stable
output voltage over a wide range of operating
currents and temperatures. The LM4040 uses fuse
and Zener-zap reverse breakdown voltage trim during
wafer sort to offer four output voltage tolerances,
ranging from 0.1% (max) for the A grade to 1% (max)
for the D grade. Thus, a great deal of flexibility is
offered to designers in choosing the best cost-to-
performance ratio for their applications.
Packaged in space-saving SC-70 and SOT-23-3
packages and requiring a minimum current of 45 μA
(typ), the LM4040 also is ideal for portable
applications. The LM4040xI is characterized for
operation over an ambient temperature range of
–40°C to 85°C. The LM4040xQ is characterized for
operation over an ambient temperature range of
–40°C to 125°C.
Device Information(1)
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
LM4040 SOT-23 (3) 2.92 mm × 1.30 mm
SC70 (6) 2.00 mm × 1.25 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic

2
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
Table of Contents
1 Features.................................................................. 1
2 Applications ........................................................... 1
3 Description............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information.................................................. 5
6.5 LM4040A20I, LM4040B20I Electrical
Characteristics ........................................................... 6
6.6 LM4040C20I, LM4040D20I Electrical
Characteristics ........................................................... 7
6.7 LM4040C20Q, LM4040D20Q Electrical
Characteristics ........................................................... 8
6.8 LM4040A25I, LM4040B25I Electrical
Characteristics ........................................................... 9
6.9 LM4040C25I, LM4040D25I Electrical
Characteristics ......................................................... 10
6.10 LM4040C25Q, LM4040D25Q Electrical
Characteristics ......................................................... 11
6.11 LM4040A30I, LM4040B30I Electrical
Characteristics ......................................................... 12
6.12 LM4040C30I, LM4040D30I Electrical
Characteristics ......................................................... 13
6.13 LM4040C30Q, LM4040D30Q Electrical
Characteristics ......................................................... 14
6.14 LM4040A41I, LM4040B41I Electrical
Characteristics ......................................................... 15
6.15 LM4040C41I, LM4040D41I Electrical
Characteristics ......................................................... 16
6.16 LM4040A50I, LM4040B50I Electrical
Characteristics ......................................................... 17
6.17 LM4040C50I, LM4040D50I Electrical
Characteristics ......................................................... 18
6.18 LM4040C50Q, LM4040D50Q Electrical
Characteristics ......................................................... 19
6.19 LM4040A82I, LM4040B82I Electrical
Characteristics ......................................................... 20
6.20 LM4040C82I, LM4040D82I Electrical
Characteristics ......................................................... 21
6.21 LM4040A10I, LM4040B10I Electrical
Characteristics ......................................................... 22
6.22 LM4040C10I, LM4040D10I Electrical
Characteristics ......................................................... 23
6.23 Typical Characteristics.......................................... 24
7 Detailed Description............................................ 25
7.1 Overview................................................................. 25
7.2 Functional Block Diagram....................................... 25
7.3 Feature Description................................................. 25
7.4 Device Functional Modes........................................ 25
8 Applications and Implementation ...................... 26
8.1 Application Information............................................ 26
8.2 Typical Applications ................................................ 26
9 Power Supply Recommendations...................... 29
10 Layout................................................................... 29
10.1 Layout Guidelines ................................................. 29
10.2 Layout Example .................................................... 29
11 Device and Documentation Support................. 30
11.1 Related Links ........................................................ 30
11.2 Trademarks........................................................... 30
11.3 Electrostatic Discharge Caution............................ 30
11.4 Glossary................................................................ 30
12 Mechanical, Packaging, and Orderable
Information........................................................... 30
4 Revision History
Changes from Revision M (January 2015) to Revision N Page
• Changed generic part number to include shorter list (LM4040A/B/C/D)................................................................................ 1
• Added Average temperature coefficient of reverse breakdown voltage footnote to all electrical tables................................ 6
• Changed Thermal hysteresis in electrical characteristics tables............................................................................................ 6
Changes from Revision L (January 2009) to Revision M Page
• Added Applications,Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,
Feature Description section, Device Functional Modes,Application and Implementation section, Power Supply
Recommendations section, Layout section, Device and Documentation Support section, and Mechanical,
Packaging, and Orderable Information section. ..................................................................................................................... 1
• Deleted Ordering Information table. ....................................................................................................................................... 1

3
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Device Comparison Table(1)
TADEVICE
GRADE VKA ORDERABLE PART NUMBER
–40°C to 85°C
A grade:
0.1% initial
accuracy
and
100 ppm/°C
temperature
coefficient
2.048 V LM4040A20I
2.5 V LM4040A25I
3 V LM4040A30I
4.096 V LM4040A41I
5 V LM4040A50I
8.192 V LM4040A82I
10 V LM4040A10I
B grade:
0.2% initial
accuracy
and
100 ppm/°C
temperature
coefficient
2.048 V LM4040B20I
2.5 V LM4040B25I
3 V LM4040B30I
4.096 V LM4040B41I
5 V LM4040B50I
8.192 V LM4040B82I
10 V LM4040B10I
–40°C to 85°C
C grade:
0.5% initial
accuracy
and
100 ppm/°C
temperature
coefficient
2.048 V LM4040C20I
2.5 V LM4040C25I
3 V LM4040C30I
4.096 V LM4040C41I
5 V LM4040C50I
8.192 V LM4040C82I
10 V LM4040C10I
–40°C to 85°C
D grade:
1.0% initial
accuracy
and
150 ppm/°C
temperature
coefficient
2.048 V LM4040D20I
2.5 V LM4040D25I
3 V LM4040D30I
4.096 V LM4040D41I
5 V LM4040D50I
8.192 V LM4040D82I
10 V LM4040D10I
–40°C to 125°C
C grade:
0.5% initial
accuracy
and
100 ppm/°C
temperature
coefficient
2.048 V LM4040C20Q
2.5 V LM4040C25Q
3 V LM4040C30Q
5 V LM4040C50Q
D grade:
1.0% initial
accuracy
and
150 ppm/°C
temperature
coefficient
2.048 V LM4040D20Q
2.5 V LM4040D25Q
3 V LM4040D30Q
5 V LM4040D50Q

* Pin 3 is attached to substrate and must be
connected to ANODE or left open.
DBZ (SOT-23) PACKAGE
(TOP VIEW)
CATHODE
ANODE
DCK (SC-70) PACKAGE
(TOP VIEW)
ANODE
NC
CATHODE
NC
NC
1
2
3*
1
2
3
5
4
NC – No internal connection
4
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
5 Pin Configuration and Functions
Pin Functions
PIN TYPE DESCRIPTION
NAME DBZ DCK
CATHODE 1 3 I/O Shunt Current/Voltage input
ANODE 2 1 O Common pin, normally connected to ground
NC — 2, 4, 5 I No Internal Connection
* 3 — I Substrate Connection

5
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditionsis not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
6 Specifications
6.1 Absolute Maximum Ratings
over free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
IZContinuous cathode current –10 25 mA
TJOperating virtual junction temperature 150 °C
Tstg Storage temperature range –65 150 °C
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.2 ESD Ratings VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) ±2000 V
Charged device model (CDM), per JEDEC specification JESD22-C101,
all pins(2) ±1000
(1) See parametric tables
6.3 Recommended Operating Conditions MIN MAX UNIT
IZCathode current (1) 15 mA
TAFree-air temperature LM4040xxxI –40 85 °C
LM4040xxxQ –40 125
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
6.4 Thermal Information
THERMAL METRIC(1) LM4040 UNITDBZ DCK
3 PINS 5 PINS
RθJA Junction-to-ambient thermal resistance 206 252 °C/W

DVZ
DIZ
6
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.5 LM4040A20I, LM4040B20I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A20I LM4040B20I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.048 2.048 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –2 2 –4.1 4.1 mV
Full range –15 15 –17 17
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±100
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 0.8
mV
Full range 1 1
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 6
Full range 8 8
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.8 0.3 0.8 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
7
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.6 LM4040C20I, LM4040D20I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C20I LM4040D20I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.048 2.048 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –10 10 –20 20 mV
Full range –23 23 –40 40
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 1
mV
Full range 1 1.2
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 8
Full range 8 10
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.9 0.3 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
8
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.7 LM4040C20Q, LM4040D20Q Electrical Characteristics
at extended temperature range, full-range TA= –40°C to 125°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C20Q LM4040D20Q UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.048 2.048 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –10 10 –20 20 mV
Full range –30 30 –50 50
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 1
mV
Full range 1 1.2
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 8
Full range 8 10
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.9 0.3 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
9
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.8 LM4040A25I, LM4040B25I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A25I LM4040B25I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.5 2.5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –2.5 2.5 –5 5 mV
Full range –19 19 –21 21
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±100
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 0.8
mV
Full range 1 1
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 6
Full range 8 8
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.8 0.3 0.8 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
10
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.9 LM4040C25I, LM4040D25I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C25I LM4040D25I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.5 2.5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –12 12 –25 25 mV
Full range –29 29 –49 49
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 1
mV
Full range 1 1.2
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 8
Full range 8 10
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.9 0.3 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
11
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.10 LM4040C25Q, LM4040D25Q Electrical Characteristics
at extended temperature range, full-range TA= –40°C to 125°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C25Q LM4040D25Q UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 2.5 2.5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –12 12 –25 25 mV
Full range –38 38 –63 63
IZ,min Minimum cathode current 25°C 45 75 45 75 μA
Full range 80 80
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.3 0.8 0.3 1
mV
Full range 1 1.2
1 mA < IZ< 15 mA 25°C 2.5 6 2.5 8
Full range 8 10
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.3 0.9 0.3 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
12
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.11 LM4040A30I, LM4040B30I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A30I LM4040B30I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 3 3 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –3 3 –6 6 mV
Full range –22 22 –26 26
IZ,min Minimum cathode current 25°C 47 77 47 77 μA
Full range 82 82
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±100
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.6 0.8 0.6 0.8
mV
Full range 1.1 1.1
1 mA < IZ< 15 mA 25°C 2.7 6 2.7 6
Full range 9 9
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.4 0.9 0.4 0.9 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
13
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.12 LM4040C30I, LM4040D30I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C30I LM4040D30I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 3 3 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –15 15 –30 30 mV
Full range –34 34 –59 59
IZ,min Minimum cathode current 25°C 45 77 45 77 μA
Full range 82 82
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.4 0.8 1.4 1
mV
Full range 1.1 1.3
1 mA < IZ< 15 mA 25°C 2.7 6 2.7 8
Full range 9 11
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.4 0.9 0.4 1.2 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
14
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.13 LM4040C30Q, LM4040D30Q Electrical Characteristics
at extended temperature range, full-range TA= –40°C to 125°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C30Q LM4040D30Q UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 3 3 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –15 15 –30 30 mV
Full range –45 45 –75 75
IZ,min Minimum cathode current 25°C 47 77 47 77 μA
Full range 82 82
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±20 ±20
ppm/°CIZ= 1 mA 25°C ±15 ±15
Full range ±100 ±150
IZ= 100 μA 25°C ±15 ±15
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.4 0.8 0.4 1.1
mV
Full range 1.1 1.3
1 mA < IZ< 15 mA 25°C 2.7 6 2.7 8
Full range 9 11
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.4 0.9 0.4 1.2 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 35 35 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
15
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.14 LM4040A41I, LM4040B41I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A41I LM4040B41I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 4.096 4.096 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –4.1 4.1 –8.2 8.2 mV
Full range –31 31 –35 35
IZ,min Minimum cathode current 25°C 50 83 50 83 μA
Full range 88 88
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±30 ±30
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±100
IZ= 100 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.5 0.9 0.5 0.9
mV
Full range 1.2 1.2
1 mA < IZ< 15 mA 25°C 3 7 3 7
Full range 10 10
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.5 1 0.5 1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 80 80 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
16
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.15 LM4040C41I, LM4040D41I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C41I LM4040D41I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 4.096 4.096 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –20 20 –41 41 mV
Full range –47 47 –81 81
IZ,min Minimum cathode current 25°C 50 83 50 83 μA
Full range 88 88
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±30 ±30
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±150
IZ= 100 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.5 0.9 0.5 1.2
mV
Full range 1.2 1.5
1 mA < IZ< 15 mA 25°C 3 7 3 9
Full range 10 13
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.5 1 0.5 1.3 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 80 80 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
17
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.16 LM4040A50I, LM4040B50I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A50I LM4040B50I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 5 5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –5 5 –10 10 mV
Full range –38 38 –43 43
IZ,min Minimum cathode current 25°C 65 89 65 89 μA
Full range 95 95
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±30 ±30
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±100
IZ= 100 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.5 1 0.5 1
mV
Full range 1.4 1.4
1 mA < IZ< 15 mA 25°C 3.5 8 3.5 8
Full range 12 12
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.5 1.1 0.5 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 80 80 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
18
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.17 LM4040C50I, LM4040D50I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C50I LM4040D50I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 5 5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –25 25 –50 50 mV
Full range –58 58 –99 99
IZ,min Minimum cathode current 25°C 65 89 65 89 μA
Full range 95 95
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±30 ±30
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±150
IZ= 100 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.5 1 0.5 1.3
mV
Full range 1.4 1.8
1 mA < IZ< 15 mA 25°C 3.5 8 3.5 10
Full range 12 15
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.5 1.1 0.5 1.5 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 80 80 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
19
LM4040A , LM4040B
LM4040C , LM4040D
www.ti.com SLOS456N –JANUARY 2005–REVISED OCTOBER 2017
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation FeedbackCopyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.18 LM4040C50Q, LM4040D50Q Electrical Characteristics
at extended temperature range, full-range TA= –40°C to 125°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040C50Q LM4040D50Q UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 100 μA 25°C 5 5 V
ΔVZReverse breakdown voltage
tolerance IZ= 100 μA25°C –25 25 –50 50 mV
Full range –75 75 –125 125
IZ,min Minimum cathode current 25°C 65 89 65 89 μA
Full range 95 95
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±30 ±30
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±150
IZ= 100 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.5 1 0.5 1
mV
Full range 1.4 1.8
1 mA < IZ< 15 mA 25°C 3.5 8 3.5 8
Full range 12 12
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.5 1.1 0.5 1.1 Ω
eNWideband noise IZ= 100 μA,
10 Hz ≤f≤10 kHz 25°C 80 80 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 100 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —

DVZ
DIZ
20
LM4040A , LM4040B
LM4040C , LM4040D
SLOS456N –JANUARY 2005–REVISED OCTOBER 2017 www.ti.com
Product Folder Links: LM4040A LM4040B LM4040C LM4040D
Submit Documentation Feedback Copyright © 2005–2017, Texas Instruments Incorporated
(1) The overtemperature 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 VRtemperature coefficient, maxΔT is the maximum difference in temperature
from the reference point of 25°C to T MIN or TMAX, and VRis the reverse breakdown voltage. The total overtemperature 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
The total overtemperature tolerance for the different grades in the extended 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
Therefore, as an example, the A-grade 2.5-V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5 V × 0.75%
= ±19 mV.
(2) 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.
6.19 LM4040A82I, LM4040B82I Electrical Characteristics
at industrial temperature range, full-range TA= –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TALM4040A82I LM4040B82I UNIT
MIN TYP MAX MIN TYP MAX
VZReverse breakdown voltage IZ= 150 μA 25°C 8.192 8.192 V
ΔVZReverse breakdown voltage
tolerance IZ= 150 μA25°C –8.2 8.2 –16 16 mV
Full range –61 61 –70 70
IZ,min Minimum cathode current 25°C 67 106 67 106 μA
Full range 110 110
αVZ Average temperature coefficient of reverse breakdown voltage
(1)
IZ= 10 mA 25°C ±40 ±40
ppm/°CIZ= 1 mA 25°C ±20 ±20
Full range ±100 ±100
IZ= 150 μA 25°C ±20 ±20
Reverse breakdown voltage
change with cathode current
change
IZ,min < IZ< 1 mA 25°C 0.6 1.3 0.6 1.6
mV
Full range 2.5 2.5
1 mA < IZ< 15 mA 25°C 7 10 7 10
Full range 18 18
ZZReverse dynamic impedance IZ= 1 mA, f = 120 Hz,
IAC = 0.1 IZ25°C 0.6 1.5 0.6 1.5 Ω
eNWideband noise IZ= 150 μA,
10 Hz ≤f≤10 kHz 25°C 130 130 μVRMS
Long-term stability of reverse
breakdown voltage t = 1000 h,
TA= 25°C ± 0.1°C,
IZ= 150 μA120 120 ppm
VHYST Thermal hysteresis(2) ΔTA= –40°C to 125°C 0.08% 0.08% —