NSC LM4050CIM3X-5.0, LM4050CIM3X-4.1, LM4050CIM3X-2.5, LM4050CIM3-8.2, LM4050CIM3-5.0 Datasheet

LM4050
Precision Micropower Shunt Voltage Reference

LM4050 Precision Micropower Shunt Voltage Reference

May 2000

General Description

Ideal for space critical applications, the LM4050 precision
voltage reference is available in the sub-miniature (3 mm x

1.3 mm) SSOT-23 surface-mount package. The LM4050’s
design eliminates theneed for an external stabilizing capaci­tor while ensuring stability with any capacitive load, thus
making the LM4050 easy to use. Further reducing design ef­fort is the availability of several fixed reverse breakdownvolt­ages: 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V. The
minimum operating current increases from 60 µA for the
LM4050-2.5 to 100 µA for the LM4050-10.0. All versions
have a maximum operating current of 15 mA.

The LM4050 utilizes fuse and zener-zap reverse breakdown
voltage trim during wafer sort to ensure that the prime parts
have an accuracy of better than
Bandgap reference temperature drift curvature correction
and low dynamic impedance ensure stable reverse break­down voltage accuracy over a wide range of operating tem­peratures and currents.

All grades and voltage options of the LM4050 operate be­tween −40˚C and +85˚C. Selected parts can operate in the
extended temperature range, from −40˚C and +125˚C.

±

0.1% (A grade) at 25˚C.

Features

n Small packages: SSOT-23
n No output capacitor required
n Tolerates capacitive loads
n Fixed reverse breakdown voltages of 2.500V, 4.096V,

5.000V, 8.192V, and 10.000V

Key Specifications (LM4050-2.5)

n Output voltage tolerance

±

(A grade, 25˚C)

n Low output noise

(10 Hz to 10 kHz) 41 µV

n Wide operating current range 60 µA to 15 mA
n Industrial temperature range −40˚C to +85˚C
n Extended temperature range −40˚C to +125˚C
n Low temperature coefficient 50 ppm/˚C (max)

0.1% (max)

(typ)

rms

Applications

n Portable, Battery-Powered Equipment
n Data Acquisition Systems
n Instrumentation
n Process Control
n Energy Management
n Product Testing
n Automotive
n Precision Audio Components

Connection Diagrams

SSOT-23

DS101045-1

*This pin must be left floating or connected to pin 2.

Top View

See NS Package Number MF03A

© 2000 National Semiconductor Corporation DS101045 www.national.com

Ordering Information

LM4050

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

Reverse Breakdown

Voltage Tolerance at 25˚C and Average

Reverse Breakdown

Voltage Temperature Coefficient

±

0.1%, 50 ppm/˚C max (A grade)

±

0.2%, 50 ppm/˚C max (B grade)

±

0.5%, 50 ppm/˚C max (C grade)

LM4050 Supplied as 1000 Units,

Tape and Reel

LM4050AIM3-2.5 LM4050AIM3X-2.5
LM4050AIM3-4.1 LM4050AIM3X-4.1
LM4050AIM3-5.0 LM4050AIM3X-5.0
LM4050AIM3-8.2 LM4050AIM3X-8.2

LM4050AIM3-10 LM4050AIM3X-10
LM4050BIM3-2.5 LM4050BIM3X-2.5
LM4050BIM3-4.1 LM4050BIM3X-4.1
LM4050BIM3-5.0 LM4050BIM3X-5.0
LM4050BIM3-8.2 LM4050BIM3X-8.2

LM4050BIM3-10 LM4050BIM3X-10
LM4050CIM3-2.5 LM4050CIM3X-2.5
LM4050CIM3-4.1 LM4050CIM3X-4.1
LM4050CIM3-5.0 LM4050CIM3X-5.0
LM4050CIM3-8.2 LM4050CIM3X-8.2

LM4050CIM3-10 LM4050CIM3X-10

LM4050 Supplied as 3000 Units,

Tape and Reel

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

Reverse Breakdown

Voltage Tolerance at 25˚C and Average

Reverse Breakdown

Voltage Temperature Coefficient

±

0.5%, 50 ppm/˚C max (C grade) LM4050CEM3-2.5 LM4050CEM3X-2.5

LM4050 Supplied as 1000 Units,

Tape and Reel

LM4050 Supplied as 3000 Units,

Tape and Reel

SSOT-23 Package Marking Information

Only three fields of marking are possible on the SSOT-23’s small surface. This table gives the meaning of the three fields.

Part Marking Field Definition

RCA First Field:
RDA R = Reference
REA Second Field:
RFA C = 2.500V Voltage Option
RGA D = 4.096V Voltage Option
RCB E = 5.000V Voltage Option
RDB F = 8.192V Voltage Option
REB G = 10.000V Voltage Option
RFB
RGB Third Field:
RCC A–C = Initial Reverse Breakdown Voltage or Reference Voltage Tolerance
RDC A =
REC
RFC
RGC

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±

0.1%, B =±0.2%, C = +0.5%,

LM4050

Absolute Maximum Ratings (Note 1)

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

Reverse Current 20 mA
Forward Current 10 mA

Power Dissipation (T

= 25˚C) (Note 3)

A

M3 Package 280 mW
Storage Temperature (Note 2) −65˚C to +150˚C
Lead Temperature
M3 Package

Vapor phase (60 seconds) +215˚C
Infrared (15 seconds) +220˚C

ESD Susceptibility

Human Body Model (Note 4) 2 kV

See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.

Operating Ratings(Notes 1, 3)

Temperature Range (T

Reverse Current

LM4050-2.5
Electrical Characteristics

Boldface limits apply for TA=TJ=T

verse Breakdown Voltage tolerances of

Symbol Parameter Conditions Typical

V

Reverse Breakdown

R

Voltage
Reverse Breakdown

Voltage Tolerance (Note 7)

I

RMIN

∆V

Minimum Operating Current 41 µA

/∆T Average Reverse

R

Breakdown Voltage
Temperature Coefficient
(Note 7)

∆V

/∆IRReverse Breakdown

R

Voltage Change with
Operating Current Change
(Note 8)

Z

Reverse Dynamic

R

Impedance

e

∆V

Wideband Noise IR= 100 µA 41 µV

N

Reverse Breakdown

R

Voltage Long Term Stability

V

Output Hysteresis ∆T = −40˚C to 125˚C 0.7 mV

HYST

to T

MIN

±

0.1%,±0.2%, and 0.5% respectively.

; all other limits TA=TJ= 25˚C. The grades A, B and C designate initial Re-

MAX

(Note 5)

IR= 100 µA 2.500 V

I

= 100 µA

R

Industrial Temp. Range
Devices

Extended Temp. Range
Devices

=10mA

I

R

I

=1mA

R

I

= 100 µA

R

≤ IR≤ 1 mA 0.3 mV

I

RMIN

1mA≤I

≤15 mA 2.3 mV

R

IR= 1 mA, f = 120 Hz,

= 0.1 I

I

AC

R

±

20 ppm/˚C

±

15 ppm/˚C

±

15

0.3 Ω

10 Hz ≤ f ≤ 10 kHz
t = 1000 hrs

T = 25˚C

= 100 µA

I

R

±

0.1˚C

120 ppm

Machine Model (Note 4) 200V

≤ TA≤ T

min

Industrial Temperature Range −40˚C ≤ T
Extended temperature Range −40˚C ≤ T

≤ +85˚C

A

≤ +125˚C

A

max

LM4050-2.5 60 µA to 15 mA
LM4050-4.1 68 µA to 15 mA
LM4050-5.0 74 µA to 15 mA
LM4050-8.2 91 µA to 15 mA
LM4050-10.0 100 µA to 15 mA

LM4050AIM3

Limits

(Note 6)

LM4050BIM3

Limits

(Note 6)

LM4050CIM3

LM4050CEM3

Limits

Units

(Limit)

(Note 6)

±

2.5

±

11

±

5.0

±

14

±

13 mV (max)

±

21 mV (max)

±

25 mV (max)

60 60 60 µA (max)

65 65 65 µA (max)

±

50

±

50

±

50 ppm/˚C (max)

0.8 0.8 0.8 mV (max)

1.2 1.2 1.2 mV (max)

6.0 6.0 6.0 mV (max)

8.0 8.0 8.0 mV (max)

rms

)

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LM4050-4.1
Electrical Characteristics (Industrial Temperature Range)

LM4050

Boldface limits apply for TA=TJ=T

verse Breakdown Voltage tolerances of

to T

MIN

±

0.1%,±0.2%, and 0.5% respectively.

; all other limits TA=TJ= 25˚C. The grades A, B and C designate initial Re-

MAX

Symbol Parameter Conditions

V

Reverse Breakdown

R

IR= 100 µA 4.096 V

Voltage
Reverse Breakdown

I

= 100 µA

R

Voltage Tolerance (Note 7)

I

RMIN

∆V

∆V

Minimum Operating Current 52 µA

/∆T Average Reverse

R

Breakdown Voltage
Temperature
Coefficient(Note 7)

/∆IRReverse Breakdown

R

=10mA

I

R

I

=1mA

R

I

= 100 µA

R

≤ IR≤ 1 mA 0.2 mV

I

RMIN

Voltage Change with
Operating Current Change
(Note 8)

Z

Reverse Dynamic

R

Impedance

e

Wideband Noise IR= 100 µA 93 µV

N

1mA≤I

≤15 mA 2.0 mV

R

IR= 1 mA, f = 120 Hz, 0.5 Ω
I

= 0.1 I

AC

R

10 Hz ≤ f ≤ 10 kHz

∆V

V

Reverse Breakdown

R

Voltage Long Term Stability

Output Hysteresis ∆T = −40˚C to 125˚C 1.148 mV

HYST

t = 1000 hrs
T = 25˚C
I

R

±

= 100 µA

0.1˚C

Typical

LM4050AIM3 LM4050BIM3 LM4050CIM3

(Note 5)

Limits Limits Limits

(Note 6) (Note 6) (Note 6)

±

4.1

±

18

±

8.2

±

22

±

21 mV (max)

±

34 mV (max)

68 68 68 µA (max)
73 73 73 µA (max)

±

30 ppm/˚C

±

20 ppm/˚C

±

20

±

50

±

50

±

50 ppm/˚C (max)

0.9 0.9 0.9 mV (max)

1.2 1.2 1.2 mV (max)

7.0 7.0 7.0 mV (max)

10.0 10.0 10.0 mV (max)

120 ppm

Units

(Limit)

rms

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LM4050-5.0
Electrical Characteristics (Industrial Temperature Range)

Boldface limits apply for TA=TJ=T

verse Breakdown Voltage tolerances of

to T

MIN

±

0.1%,±0.2% and 0.5% respectively.

; all other limits TA=TJ= 25˚C. The grades A, B and C designate initial Re-

MAX

LM4050

Symbol Parameter Conditions

V

Reverse Breakdown

R

IR= 100 µA 5.000 V

Voltage
Reverse Breakdown

I

= 100 µA

R

Voltage Tolerance (Note 7)

I

∆V

∆V

Minimum Operating Current 56 µA

RMIN

/∆T Average Reverse

R

Breakdown Voltage
Temperature Coefficient
(Note 7)

/∆IRReverse Breakdown

R

=10mA

I

R

I

=1mA

R

I

= 100 µA

R

≤ IR≤ 1 mA 0.2 mV

I

RMIN

Voltage Change with
Operating Current Change
(Note 8)

1mA≤I

Z

e

Reverse Dynamic

R

Impedance
Wideband Noise IR= 100 µA 93 µV

N

IR= 1 mA, f = 120 Hz, 0.5 Ω
I

AC

≤15 mA 2.0 mV

R

= 0.1 I

R

10 Hz ≤ f ≤ 10 kHz

∆V

V

Reverse Breakdown

R

Voltage Long Term Stability

Output Hysteresis ∆T = −40˚C to 125˚C 1.4 mV

HYST

t = 1000 hrs
T = 25˚C
I

R

±

= 100 µA

0.1˚C 120 ppm

Typical

(Note 5)

Limits

Limits Limits

(Note 6) (Note 6) (Note 6)

LM4050AIM3 LM4050BIM3 LM4050CIM3

±

5.0

±

22

±

10

±

27

±

25 mV (max)

±

42 mV (max)

74 74 74 µA (max)
80 80 80 µA (max)

±

30 ppm/˚C

±

20 ppm/˚C

±

20

±

50

±

50

±

50 ppm/˚C (max)

1.0 1.0 1.0 mV (max)

1.4 1.4 1.4 mV (max)

8.0 8.0 8.0 mV (max)

12.0 12.0 12.0 mV (max)

Units

(Limit)

Ω (max)

rms

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