National Semiconductor LM4030 Technical data

May 30, 2008

LM4030 SOT-23 Ultra-High Precision Shunt Voltage Reference

General Description

The LM4030 is an ultra-high precision shunt voltage reference, having exceptionally high initial accuracy (0.05%) and temperature stability (10ppm/°C). The LM4030 is available with fixed voltage options of 2.5V and 4.096V. Despite the tiny SOT23 package, the LM4030 exhibits excellent thermal hysteresis (75ppm) and long-term stability (40ppm) as well as immunity to board stress effects.

The LM4030 is designed to operate without an external capacitor, but any capacitor up to 10µF may be used. The LM4030 can be powered off as little as 120µA (max) but is capable of shunting up to 30mA continuously. As with any shunt reference, the LM4030 can be powered off of virtually any supply and is a simple way to generate a highly accurate system reference.

The LM4030 is available in three grades (A, B, and C). The best grade devices (A) have an initial accuracy of 0.05% with guaranteed temperature coefficient of 10 ppm/°C or less, while the lowest grade parts (C) have an initial accuracy of

0.15% and a temperature coefficient of 30 ppm/°C.

Typical Application Circuit

Features

High output voltage accuracy 0.05%

■

Low temperature coefficient 10 ppm/°C

■

Extended temperature operation -40-125°C

■

Excellent thermal hysteresis, 75ppm

■

Excellent long-term stability, 40ppm

■

High immunity to board stress effects

■

Capable of handling 50 mA transients

■

Voltage options 2.5V, 4.096V

■

SOT23-5 Package

■

Applications

Data Acquisition/Signal path

■

Test and Measurement

■

Automotive & Industrial

■

Communications

■

Instrumentation

■

Power Management

■

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Connection Diagram

Top View

SOT23-5 Package

NS Package Number MF05A

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Ordering Information

LM4030

Input Output Voltage Accuracy at

25°C And Temperature Coefficient

0.05%, 10 ppm/°C max (A grade) LM4030AMF-2.5 LM4030AMFX-2.5 R5JA

0.10%, 20 ppm/°C max (B grade) LM4030BMF-2.5 LM4030BMFX-2.5 R5JB

0.15%, 30 ppm/°C max (C grade) LM4030CMF-2.5 LM4030CMFX-2.5 R5JC

Pin Descriptions

Pin # Name Function

1 N/C No connect pin, leave floating

2 GND, N/C Ground or no connect

3 N/C No connect pin, leave floating

4 VREF Reference voltsge

5 GND Ground

LM4030 Supplied as 1000

units, Tape and Reel

LM4030AMF-4.096 LM4030AMFX4.096 R5KA

LM4030BMF-4.096 LM4030BMFX4.096 R5KB

LM4030CMF-4.096 LM4030CMFX4.096 R5KC

LM4030 Supplied as 3000 units,

Tape and Reel

Part Marking

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LM4030

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Maximum Voltage on any input -0.3 to 6V Power Dissipation (TA = 25°C)

(Note 2) 350mW Storage Temperature Range −65°C to 150°C

Lead Temperature (soldering, 10sec) 260°C

Infrared (15sec) 220°C ESD Susceptibility (Note 3)

Human Body Model 2kV

Operating Ratings

Maximum Continuous Shunt Current 30mA Maximum Shunt Current (<1s) 50mA Junction Temperature Range (TJ) −40°C to

+125°C

Vapor Phase (60 sec) 215°C

Electrical Characteristics LM4030-2.5 (V

the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.

Symbol Parameter Conditions Min

REF

Reverse Breakdown Voltage Tolerance (I

LM4030A-2.5 (A Grade - 0.05%) -0.05 0.05 %

LM4030B-2.5 (B Grade - 0.10%) -0.10 0.10 %

LM4030C-2.5 (C Grade - 0.15%) -0.15 0.15 %

RMIN

TC Temperature Coefficient (Note 6)

LM4030A-2.5

LM4030B-2.5

LM4030C-2.5

ΔV

/ΔI

REF

SHUNT

ΔV

REF

HYST

Reverse Breakdown Voltage I

Minimum Operating Current 120 µA

Reverse Breakdown Voltage Change with Current

Long Term Stability (Note 7) 1000 Hrs, TA = 30°C 40 ppm

Thermal Hysteresis (Note 8)

Output Noise Voltage (Note 9) 0.1 Hz to 10 Hz 105 µV

= 2.5V) Limits in standard type are for T

OUT

= 120µA 2.5 V

SHUNT

0°C ≤ TJ ≤ + 85°C

-40°C ≤ TJ ≤ +125°C

160µA ≤ I

-40°C ≤ TJ ≤ +125°C

= 120µA)

≤ 30mA

SHUNT

= 25°C only, and limits in boldface type apply over

Typ

(Note 4)

(Note 5)

Max

(Note 4)

Unit

ppm / °C

25 110 ppm / mA

75 ppm

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Electrical Characteristics LM4030-4.096 (V

LM4030

over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.

Symbol Parameter Conditions Min

REF

Reverse Breakdown Voltage I

Reverse Breakdown Voltage Tolerance ( I

LM4030A-4.096 (A Grade - 0.05%) -0.05 0.05 %

LM4030B-4.096 (B Grade - 0.10%) -0.10 0.10 %

LM4030C-4.096 (C Grade - 0.15%) -0.15 0.15 %

RMIN

Minimum Operating Current 130 µA

TC Temperature Coefficient (Note 6)

LM4030A-4.096

LM4030B-4.096

LM4030C-4.096

ΔV

REF

/ΔI

Reverse Breakdown Voltage

LOAD

Change with Current

ΔV

REF

HYST

Long Term Stability (Note 7) 1000 Hrs, TA = 30°C 40 ppm

Thermal Hysteresis (Note 8)

Output Noise Voltage (Note 9) 0.1 Hz to 10 Hz 165 µV

= 4.096V) Limits in standard type are for T

OUT

= 130µA 4.096 V

SHUNT

= 130µA)

SHUNT

0°C ≤ TJ ≤ + 85°C

-40°C ≤ TJ ≤ +125°C

160µA ≤ I

SHUNT

-40°C ≤ TJ ≤ +125°C

≤ 30mA

= 25°C only, and limits in boldface type apply

(Note

Typ

(Note

Max

(Note 4)

15 95 ppm / mA

75 ppm

Unit

ppm / °C

Note 1: Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics.

Note 2: Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by T junction temperature), θ P

= (T

DissMAX

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.

Note 4: Limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality

Control.

Note 5: Typical numbers are at 25°C and represent the most likely parametric norm.

Note 6: Temperature coefficient is measured by the "Box" method; i.e., the maximum ΔV

Note 7: Long term stability is V

Note 8: Thermal hysteresis is defined as the change in +25°C output voltage before and after cycling the device from (-40°C to 125°C) eight times.

Note 9: Low frequency peak-to-peak noise measured using first-order 0.1 Hz HPF and second-order 10 Hz LPF.

JMAX

(junction to ambient thermal resistance) and TA (ambient temperature). The maximum power dissipation at any temperature is:

J-A

- TA) /θ

up to the value listed in the Absolute Maximum Ratings. θ

J-A

@25°C measured during 1000 hrs. This measurement is taken for IR = 500 µA.

REF

for SOT23-5 package is 220°C/W, T

J-A

is divided by the maximum ΔT.

REF

JMAX

= 125°C.

JMAX

(maximum

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Typical Performance Characteristics for 2.5V

LM4030

Output Voltage vs Temperature

Start Up - 120 µA

0.1 - 10 Hz Peak-to-Peak Noise

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Start Up - 50 mA

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Reverse Breakdown Voltage Change with Current

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Reverse Dynamic Impedance vs Frequency

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