ST LM4041AICT-1.2, LM4041BICT-1.2, LM4041CICT-1.2, LM4041DICT-1.2, LM4041AILT-1.2 User Manual

Precision micropower shunt voltage reference

Features

■ Fixed 1.225 V typical output voltage

■ Ultra low operating current: 40 µA at 25 °C

■ High precision: +/- 0.1% @ 25 °C (0.2%, 0.5%

and 1% versions are also available)

■ Stable when used with capacitive loads

■ Industrial (- 40 to+ 85 °C) and Extended (- 40

to +125 °C) temperature range versions
available

■ 100 ppm/°C maximum temperature coefficient

■ Available in SOT23-3L and SOT323-5L

packages

LM4041xx

Datasheet − production data

SOT23-3L

SOT323-5L

Applications

■ Computers

■ Battery chargers

■ Switch mode power supply

■ Battery operated equipment

■ Data acquisition systems

■ Energy management

■ Instrumentation

Description

The LM4041 is a micropower shunt voltage
reference, providing a stable 1.225 V output
voltage, with an initial accuracy of 0.1% @ 25 °C
and a low temperature coefficient. Available in
SOT323-5L and SOT23-3L surface mount
packages, it can be designed in applications
where space saving is a critical issue. The low
operating current is a key advantage for power
restricted designs. In addition, the LM4041 is very
stable and can be used in a broad range of
application conditions.

July 2012 Doc ID 018817 Rev 3 1/16

This is information on a product in full production.

www.st.com

16

Contents LM4041xx

Contents

1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2/16 Doc ID 018817 Rev 3

LM4041xx Pin configuration

1 Pin configuration

Figure 1. Pin connection (top view)

AM09377v1

SOT23-3L SOT323-5L

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

AM09

378v1

Doc ID 018817 Rev 3 3/16

Maximum ratings LM4041xx

2 Maximum ratings

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit

Reverse breakdown current 20 mA

Forward current 10 mA

Power dissipation
SOT23-3L
SOT323-5L

(1)

500
536

mW

Storage temperature - 65 to +150 °C

T

I

K

I

F

P

STG

D

Human Body Model (HBM) 2 kV

ESD

Machine Model (MM) 200 V

Charged Device Model 1500 V

T

LEAD

T

J

1. PD has been calculated with T

Lead temperature (soldering) 10 sec 260 °C

Max junction temperature +150 °C

= 25°C and T

AMB

JMAX

= 150 °C.

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these conditions is not implied.

Table 2. Thermal data

Symbol Parameter SOT323-5L SOT23-3L Unit

R

R

thJA

thJC

Thermal resistance junction-ambient 233 248 °C/W

Thermal resistance junction-case 90 136 °C/W

Table 3. Operating conditions

Symbol Parameter Value Unit

I

KMIN

I

KMAX

T

OPER

4/16 Doc ID 018817 Rev 3

Minimum operating current 40 µA

Maximum operating current 12 mA

Industrial - 40 to + 85

Operating free air temperature range

Extended - 40 to + 125

°C

LM4041xx Electrical characteristics

3 Electrical characteristics

T

= 25 °C, unless otherwise specified.

AMB

Table 4. Electrical characteristics

Symbol Parameter Test conditions Min. Typ. Max. Unit

= 100 µA

I

k

ΔV

Vk

I

kmin

/ΔT

k

Reverse breakdown
voltage

Minimum operating
current

Average temperature
coefficient

(2)

LM4041A, 0.1%
LM4041B, 0.2%
LM4041C, 0.5%
LM4041D, 1%

= 25 °C 25 40

T

amb

max

(1)

-40 °C < T

I

= 100 µA ± 36 ± 100 ppm/°C

k

amb

< T

1.2238

1.2225

1.219

1.213

1.225

1.2262

1.2275

1.231

1.237

50

V

µA

< Ik < 1 mA

I

kmin

- 40 °C < T

1 mA < I

ΔV

Reverse breakdown
voltage change with

/ΔI

k

k

operating current range

- 40 °C < T

R

K

e

1. T

max

2. The average temperature coefficient is defined as: 10

Static impedance ΔI

ka

Long term stability I

vh

Wide band noise I

n

= 85 °C for LM4041xI (industrial version) and T

= 100 µA to 1 mA 0.4 1 Ω

k

= 100 µA, t = 1000 hrs 120 ppm

k

= 100 µA, 10 Hz < f < 10 kHz 60 µV

k

max

max

(1)

(1)

k@25°C

x (T

max-Tmin

< T

amb

< 12 mA

k

< T

amb

= 125 °C for LM4041xE (extended version).

max

6

x {max(ΔVk) / [V

0.4

4

)]} [ppm/°C].

1

1.5
mV

8

10

RMS

Note: Limits are 100% production tested at 25 °C. Limits over temperature are guaranteed through

correlation and by design.

Doc ID 018817 Rev 3 5/16

Typical performance characteristics LM4041xx

4 Typical performance characteristics

The following plots are referred to the typical application circuit and, unless otherwise noted,

= 25 °C.

at T

A

Figure 2. Vk change vs. temperature Figure 3. Minimum current for regulation

AM09372v1

1240

1235

1230

(mV)

1225

K

V

1220

1215

1210

-40 -20 0 25 50 85 105 125

TEMP (° C)

AM09371v1

70

K

50

30

Reverse current I (µA)

10

0.4 0.8

1.2

VK(V)

Figure 4. Output impedance vs. frequency Figure 5. Minimum current for regulation vs.

1000

Theo ric C= 1µF

100

AM09373v1

C = 0

10

I = 150µA

Impedance (Ohm)

CL=1µF

1

60

50

40

(µA)

30

KMIN

I

20

10

temperature

AM09374v1

I = 1mA

0.1

0

-40 -20 0 25 50 85 105 125

100 1000 10000 100000 1000000

Frequency (Hz)

6/16 Doc ID 018817 Rev 3

TEMP (° C)

LM4041xx Typical performance characteristics

Figure 6. Startup characteristics Figure 7. Startup measure circuit

Figure 8. Wideband noise voltage

1200

1000

AM09376v1

Pulse

Generator

f=100 KHz

R

18 K

I

K

AM09375v1

V

K

800

600

400

Noise [nV /sqr (Hz)]

200

0

10 100 1000 10000 100000

Frequency (Hz)

Doc ID 018817 Rev 3 7/16

Package mechanical data LM4041xx

5 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of

®

ECOPACK

packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions, and product status are available at:
ECOPACK is an ST trademark.

Table 5. SOT23-3L mechanical data

Dim.

Min. Typ. Max.

A 0.89 1.12

A1 0.01 0.10

A2 0.88 0.95 1.02

b 0.30 0.50

c 0.08 0.20

D 2.80 2.90 3.04

E 2.10 2.64

E1 1.20 1.30 1.40

e0.95

e1 1.90

mm.

www.st.com

.

L 0.40 0.50 0.60

L1 0.54

k0° 8°

8/16 Doc ID 018817 Rev 3

LM4041xx Package mechanical data

Figure 9. SOT23-3L dimensions

7110469_B

Doc ID 018817 Rev 3 9/16

Package mechanical data LM4041xx

Table 6. SOT323-5L mechanical data

mm.

Dim.

Min. Typ. Max.

A 0.80 1.10

A1 0 0.10

A2 0.80 0.90 1

b 0.15 0.30

c 0.10 0.22

D 1.80 2 2.20

E 1.80 2.10 2.40

E1 1.15 1.25 1.35

e0.65

e1 1.30

L 0.26 0.36 0.46

<0° 8°

10/16 Doc ID 018817 Rev 3

LM4041xx Package mechanical data

Figure 10. SOT323-5L dimensions

7091413/E

Doc ID 018817 Rev 3 11/16

Package mechanical data LM4041xx

Tape & reel SOT23-xL mechanical data

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N60 2.362

T 14.4 0.567

Ao 3.133.233.33 0.123 0.127 0.131

Bo 3.07 3.17 3.27 0.120 0.124 0.128

Ko 1.27 1.37 1.47 0.050 0.054 0.0.58

Po 3.9 4.0 4.1 0.153 0.157 0.161

P 3.9 4.0 4.1 0.153 0.157 0.161

12/16 Doc ID 018817 Rev 3

LM4041xx Package mechanical data

Tape & reel SOT323-xL mechanical data

Dim.

mm. inch.

Min. Typ. Max. Min. Typ. Max.

A 175 1801856.889 7.086 7.283

C 12.8 13 13.2 0.504 0.512 0.519

D 20.2 0.795

N59.5 60 60.5 2.362

T 14.4 0.567

Ao 2.25 0.088

Bo 2.7 0.106

Ko 1.2 0.047

Po 3.9 4 4.1 0.153 0.157 0.161

P 3.8 4 4.2 0.149 0.157 0.165

Doc ID 018817 Rev 3 13/16

Order codes LM4041xx

6 Order codes

Table 7. Order codes

Order codes Precision Packages Operating temperature range Marking

LM4041AICT-1.2 0.1%

LM4041BICT-1.2 0.2% L2

SOT323-5L

LM4041CICT-1.2 0.5% L25

LM4041DICT-1.2 1% L26

LM4041AILT-1.2 0.1%

LM4041BILT-1.2 0.2% L24

SOT23-3L

LM4041CILT-1.2 0.5% L25

LM4041DILT-1.2 1% L26

LM4041AECT-1.2 0.1%

LM4041BECT-1.2 0.2% E2

SOT323-5L

LM4041CECT-1.2 0.5% E25

LM4041DECT-1.2 1% E26

LM4041AELT-1.2 0.1%

LM4041BELT-1.2 0.2% E24

SOT23-3L

LM4041CELT-1.2 0.5% E25

LM4041DELT-1.2 1% E26

Industrial

- 40 to + 85 °C

Industrial

- 40 to + 85 °C

Extended

- 40 to + 125 °C

Extended

- 40 to + 125 °C

L2

L23

E2

E23

14/16 Doc ID 018817 Rev 3

LM4041xx Revision history

7 Revision history

Table 8. Document revision history

Date Revision Changes

09-May-2011 1 Initial release.

05-Dec-2011 2 Changed maturity code and updated

25-Jul-2012 3 Added: marking order codes

Table 7 on page 14

Table 7 on page 14

.

.

Doc ID 018817 Rev 3 15/16

LM4041xx

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16/16 Doc ID 018817 Rev 3