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