LM4040BIM3-5.0-T - MAXIM INTEGRATED PRODUCTS

LM4040

LM4040 Precision Micropower Shunt Voltage Reference

Literature Number: SNOS633E

LM4040

December 9, 2010

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 capac-

itor 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 tempera-

tures and currents.

Also available is the LM4041 with two reverse breakdown

voltage versions: adjustable and 1.2V. Please see the

LM4041 data sheet.

Features

■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

LM4040 Precision Micropower Shunt Voltage Reference

Ordering Information

Industrial Temperature Range (−40°C to +85°C)

Reverse

Breakdown

Voltage

Tolerance at 25°C

and Average

Reverse

Breakdown

Voltage

Temperature

Coefficient

Package

Number

M3 (SOT-23) M7 (SC70)

Z (TO-92)

Supplied as 1000

Units Tape and

Reel

Supplied as 3000

Units tape and

Reel

Supplied as 1000

Units Tape and

Reel

Supplied as 3000

Units Tape and

Reel

±0.1%, 100 ppm/°

C max (A grade)

LM4040AIM3-2.0

LM4040AIM3-2.5

LM4040AIM3-3.0

LM4040AIM3-4.1

LM4040AIM3-5.0

LM4040AIM3-8.2

LM4040AIM3-10.0

LM4040AIM3X-2.0

LM4040AIM3X-2.5

LM4040AIM3X-3.0

LM4040AIM3X-4.1

LM4040AIM3X-5.0

LM4040AIM3X-8.2

LM4040AIM3X-10.

LM4040AIZ-2.0

LM4040AIZ-2.5

LM4040AIZ-3.0

LM4040AIZ-4.1

LM4040AIZ-5.0

LM4040AIZ-8.2

LM4040AIZ-10.0

MF03A,

Z03A

±0.2%, 100 ppm/°

C max (B grade)

LM4040BIM3-2.0

LM4040BIM3-2.5

LM4040BIM3-3.0

LM4040BIM3-4.1

LM4040BIM3-5.0

LM4040BIM3-8.2

LM4040BIM3-10.0

LM4040BIM3X-2.0

LM4040BIM3X-2.5

LM4040BIM3X-3.0

LM4040BIM3X-4.1

LM4040BIM3X-5.0

LM4040BIM3X-8.2

LM4040BIM3X-10.

LM4040BIM7-2.0

LM4040BIM7-2.5

LM4040BIM7-3.0

LM4040BIM7-4.1

LM4040BIM7-5.0

LM4040BIM7X-2.0

LM4040BIM7X-2.5

LM4040BIM7X-3.0

LM4040BIM7X-4.1

LM4040BIM7X-5.0

LM4040BIZ-2.0

LM4040BIZ-2.5

LM4040BIZ-3.0

LM4040BIZ-4.1

LM4040BIZ-5.0

LM4040BIZ-8.2

LM4040BIZ-10.0

MF03A,

Z03A,

MAA05A

±0.5%, 100 ppm/°

C max (C grade)

LM4040CIM3-2.0

LM4040CIM3-2.5

LM4040CIM3-3.0

LM4040CIM3-4.1

LM4040CIM3-5.0

LM4040CIM3-8.2

LM4040CIM3-10.0

LM4040CIM3X-2.0

LM4040CIM3X-2.5

LM4040CIM3X-3.0

LM4040CIM3X-4.1

LM4040CIM3X-5.0

LM4040CIM3X-8.2

LM4040CIM3X-10.

LM4040CIM7-2.0

LM4040CIM7-2.5

LM4040CIM7-3.0

LM4040CIM7-4.1

LM4040CIM7-5.0

LM4040CIM7X-2.0

LM4040CIM7X-2.5

LM4040CIM7X-3.0

LM4040CIM7X-4.1

LM4040CIM7X-5.0

LM4040CIZ-2.0

LM4040CIZ-2.5

LM4040CIZ-3.0

LM4040CIZ-4.1

LM4040CIZ-5.0

LM4040CIZ-8.2

LM4040CIZ-10.0

MF03A,

Z03A,

MAA05A

±1.0%, 150 ppm/°

C max (D grade)

LM4040DIM3-2.0

LM4040DIM3-2.5

LM4040DIM3-3.0

LM4040DIM3-4.1

LM4040DIM3-5.0

LM4040DIM3-8.2

LM4040DIM3-10.0

LM4040DIM3X-2.0

LM4040DIM3X-2.5

LM4040DIM3X-3.0

LM4040DIM3X-4.1

LM4040DIM3X-5.0

LM4040DIM3X-8.2

LM4040DIM3X-10.

LM4040DIM7-2.0

LM4040DIM7-2.5

LM4040DIM7-3.0

LM4040DIM7-4.1

LM4040DIM7-5.0

LM4040DIM7X-2.0

LM4040DIM7X-2.5

LM4040DIM7X-3.0

LM4040DIM7X-4.1

LM4040DIM7X-5.0

LM4040DIZ-2.0

LM4040DIZ-2.5

LM4040DIZ-3.0

LM4040DIZ-4.1

LM4040DIZ-5.0

LM4040DIZ-8.2

LM4040DIZ-10.0

MF03A,

Z03A,

MAA05A

±2.0%, 150 ppm/°

C max (E grade)

LM4040EIM3-2.0

LM4040EIM3-2.5

LM4040EIM3-3.0

LM4040EIM3X-2.0

LM4040EIM3X-2.5

LM4040EIM3X-3.0

LM4040EIM7-2.0

LM4040EIM7-2.5

LM4040EIM7-3.0

LM4040EIM7X-2.0

LM4040EIM7X-2.5

LM4040EIM7X-3.0

LM4040EIZ-2.0

LM4040EIZ-2.5

LM4040EIZ-3.0

MF03A,

Z03A,

MAA05A

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LM4040

Extended Temperature Range (−40 °C to +125°C)

Reverse Breakdown

Voltage Tolerance at 25 °C

and Average Reverse Breakdown

Voltage Temperature Coefficient

Package

M3 (SOT-23)

See NS Package

Number MF03A

±0.5%, 100 ppm/°C max (C grade) LM4040CEM3-2.0, LM4040CEM3-2.5,

LM4040CEM3-3.0, LM4040CEM3-5.0

±1.0%, 150 ppm/°C max (D grade) LM4040DEM3-2.0, LM4040DEM3-2.5,

LM4040DEM3-3.0, LM4040DEM3-5.0

±2.0%, 150 ppm/°C max (E grade) LM4040EEM3-2.0, LM4040EEM3-2.5,

LM4040EEM3-3.0

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LM4040

SOT-23 AND SC70 Package Marking Information

Only three fields of marking are possible on the SOT-23's and SC70's small surface. This table gives the meaning of the three

fields.

Part Marking Field Definition

RJA SOT-23 only First Field:

R2A SOT-23 only

RKA SOT-23 only

R4A SOT-23 only R = Reference

R5A SOT-23 only Second Field:

J = 2.048V Voltage Option

2 = 2.500V Voltage Option

R8A SOT-23 only K = 3.000V Voltage Option

R0A SOT-23 only 4 = 4.096V Voltage Option

RJB

R2B 5 = 5.000V Voltage Option

RKB

R4B 8= 8.192V Voltage Option

R5B 0 = 10.000V Voltage Option

R8B SOT-23 only

R0B SOT-23 only Third Field:

RJC

R2C A–E = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance

RKC

R4C A = ±0.1%, B = ±0.2%, C = +0.5%, D = ±1.0%, E = ±2.0%

R5C

R8C SOT-23 only

R0C SOT-23 only

RJD

R2D

RKD

R4D

R5D

R8D SOT-23 only

R0D SOT-23 only

RJE

R2E

RKE

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LM4040

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Reverse Current 20 mA

Forward Current 10 mA

Power Dissipation (TA = 25°C) (Note 2)

M3 Package 306 mW

Z Package 550 mW

M7 Package 241 mW

Storage Temperature −65°C to +150°C

Lead Temperature

M3 Package

Vapor phase (60 seconds) +215°C

Infrared (15 seconds) +220°C

Z Package

Soldering (10 seconds) +260°C

ESD Susceptibility

Human Body Model (Note 3) 2 kV

Machine Model (Note 3) 200V

See AN-450 “Surface Mounting Methods and Their Effect on

Product Reliability” for other methods of soldering surface

mount devices.

Operating Ratings (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 (Industrial Temperature Range)

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

(Limit)

(Note 5)

LM4040BIM3

LM4040BIZ

LM4040BIM7

(Limit)

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse Breakdown Voltage

Change with Operating

Current Change (Note )

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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

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LM4040

Symbol Parameter Conditions Typical

(Note 4)

LM4040AIM3

LM4040AIZ

(Limit)

(Note 5)

LM4040BIM3

LM4040BIZ

LM4040BIM7

(Limit)

(Note 5)

Units

(Limit)

ΔVRReverse 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 (Industrial Temperature Range)

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

(Limit)

(Note 5)

LM4040DIM3

LM4040DIZ

LM4040DIM7

(Limit)

(Note 5)

LM4040EIM7

LM4040EIZ

(Limit)

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse Breakdown

Voltage Change with

Operating Current

Change

(Note )

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)

ZRReverse Dynamic

Impedance

IR = 1 mA, f = 120 Hz 0.3 Ω

IAC = 0.1 IR 0.9 1.1 1.1 Ω(max)

eNWideband Noise IR = 100 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown

Voltage Long Term

Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 100 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

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LM4040

LM4040-2.0

Electrical Characteristics (Extended Temperature Range)

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)

LM4040CEM

(Limit)

(Note 5)

LM4040DEM

(Limit)

(Note 5)

LM4040EEM3

(Limit)

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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)

ZRReverse 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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

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LM4040

LM4040-2.5

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

(Note 5)

LM4040BIM3

LM4040BIZ

LM4040BIM7

Limits

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

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LM4040

LM4040-2.5

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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)

ZRReverse Dynamic

Impedance

IR = 1 mA, f = 120 Hz 0.3 Ω

IAC = 0.1 IR 0.9 1.1 1.1 Ω(max)

eNWideband Noise IR = 100 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown

Voltage Long Term

Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 100 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

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LM4040

LM4040-2.5

Electrical Characteristics (Extended Temperature Range)

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)

LM4040CEM

Limits

(Note 5)

LM4040DEM

Limits

(Note 5)

LM4040EEM3

Limits

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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)

ZRReverse 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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

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LM4040

LM4040-3.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

(Note 5)

LM4040BIM3

LM4040BIZ

LM4040BIM7

Limits

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

11 www.national.com

LM4040

LM4040-3.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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)

ZRReverse Dynamic

Impedance

IR = 1 mA, f = 120 Hz 0.4 Ω

IAC = 0.1 IR 0.9 1.2 1.2 Ω(max)

eNWideband Noise IR = 100 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown

Voltage Long Term

Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 100 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

www.national.com 12

LM4040

LM4040-3.0

Electrical Characteristics (Extended Temperature Range)

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)

LM4040CEM

Limits

(Note 5)

LM4040DEM

Limits

(Note 5)

LM4040EEM3

Limits

(Note 5)

Units

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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)

ZRReverse 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 μA35 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

13 www.national.com

LM4040

LM4040-4.1

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.5 Ω

IAC = 0.1 IR 1.0 1.0 Ω (max)

eNWideband Noise IR = 100 μA80 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

www.national.com 14

LM4040

LM4040-4.1

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.5 Ω

IAC = 0.1 IR 1.0 1.3 Ω (max)

eNWideband Noise IR = 100 μA80 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

15 www.national.com

LM4040

LM4040-5.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.5 Ω

IAC = 0.1 IR 1.1 1.1 Ω (max)

eNWideband Noise IR = 100 μA80 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 100 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

www.national.com 16

LM4040

LM4040-5.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.5 Ω

IAC = 0.1 IR 1.1 1.5 Ω (max)

eNWideband Noise IR = 100 μA80 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 100 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

17 www.national.com

LM4040

LM4040-5.0

Electrical Characteristics (Extended Temperature Range)

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 (Limit)

Limits Limits

(Note 4) (Note 5) (Note 5)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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

0.5 Ω

1.1 1.1 Ω (max)

eNWideband Noise IR = 100 μA80 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse 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 %

www.national.com 18

LM4040

LM4040-8.2

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

LM4040AIM3 LM4040BIM3

LM4040AIZ LM4040BIZ

Limits Limits

(Note 5) (Note 5)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.6 Ω

IAC = 0.1 IR 1.5 1.5 Ω (max)

eNWideband Noise IR = 150 μA130 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 150 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

19 www.national.com

LM4040

LM4040-8.2

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

LM4040CIM3 LM4040DIM3

LM4040CIZ LM4040DIZ

Limits Limits

(Note 5) (Note 5)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.6 Ω

IAC = 0.1 IR 1.5 1.9 Ω (max)

eNWideband Noise IR = 150 μA130 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 150 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

www.national.com 20

LM4040

LM4040-10.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

LM4040AIM3 LM4040BIM3

LM4040AIZ LM4040BIZ

Limits Limits

(Note 5) (Note 5)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.7 Ω

IAC = 0.1 IR 1.7 1.7 Ω (max)

eNWideband Noise IR = 150 μA180 μVrms

10 Hz ≤ f ≤ 10 kHz

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 150 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

21 www.national.com

LM4040

LM4040-10.0

Electrical Characteristics (Industrial Temperature Range)

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

(Limit)

LM4040CIM3 LM4040DIM3

LM4040CIZ LM4040DIZ

Limits Limits

(Note 5) (Note 5)

VRReverse 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/ΔTAverage 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/ΔIRReverse 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, 0.7 Ω

IAC = 0.1 IR 1.7 2.3 Ω (max)

eNWideband Noise IR = 150 μA

10 Hz ≤ f ≤ 10 kHz 180 μVrms

ΔVRReverse Breakdown Voltage

Long Term Stability

t = 1000 hrs

T = 25°C ±0.1°C 120 ppm

IR = 150 μA

VHYST Thermal Hysteresis

(Note 8)

ΔT = −40°C to +125°C 0.08 %

www.national.com 22

LM4040

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.

23 www.national.com

LM4040

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

www.national.com 24

LM4040

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

25 www.national.com

LM4040

Applications Information

The LM4040 is a precision micro-power curvature-corrected

bandgap shunt voltage reference. For space critical applica-

tions, the LM4040 is available in the sub-miniature SOT-23

and SC70 surface-mount package. The LM4040 has been

designed for stable operation without the need of an external

capacitor connected between the “+” pin and the “−” pin. If,

however, a bypass capacitor is used, the LM4040 remains

stable. Reducing design effort is the availability of several

fixed reverse breakdown voltages: 2.048V, 2.500V, 3.000V,

4.096V, 5.000V, 6.000, 8.192V, and 10.000V. The minimum

operating current increases from 60 µA for the LM4040-2.048

and LM4040-2.5 to 100 μA for the LM4040-10.0. All versions

have a maximum operating current of 15 mA.

LM4040s in the SOT-23 packages have a parasitic Schottky

diode between pin 2 (−) and pin 3 (Die attach interface con-

tact). Therefore, pin 3 of the SOT-23 package must be left

floating or connected to pin 2.

LM4040s in the SC70 have a parasitic Schottky diode be-

tween pin 1 (−) and pin 2 (Die attach interface contact).

Therefore, pin 2 must be left floating or connected to pin1.

The 4.096V version allows single +5V 12-bit ADCs or DACs

to operate with an LSB equal to 1 mV. For 12-bit ADCs or

DACs that operate on supplies of 10V or greater, the 8.192V

version gives 2 mV per LSB.

The typical thermal hysteresis specification is defined as the

change in +25°C voltage measured after thermal cycling. The

device is thermal cycled to temperature -40°C and then mea-

sured at 25°C. Next the device is thermal cycled to tempera-

ture +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 refer-

ences 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

www.national.com 26

LM4040

1132316

**Ceramic monolithic

*Tantalum

FIGURE 2. LM4040-4.1's Nominal 4.096 breakdown voltage gives ADC12451 1 mV/LSB

27 www.national.com

LM4040

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).

www.national.com 28

LM4040

1132319

FIGURE 5. Precision ±4.096V Reference

1132321

1132322

FIGURE 6. Precision 1 μA to 1 mA Current Sources

29 www.national.com

LM4040

Physical Dimensions inches (millimeters) unless otherwise noted

Plastic Surface Mount Package (M3)

NS Package Number MF03A

(JEDEC Registration TO-236AB)

www.national.com 30

LM4040

Plastic Package (Z)

NS Package Number Z03A

Molded Package (SC70)

NS Package Number MAA05A

31 www.national.com

LM4040

Notes

LM4040 Precision Micropower Shunt Voltage Reference

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