Datasheet B4041YZ-1.25, B4041YZ-1.225, B4041YM-1.25, B4041YM-1.225, B4041YK-1.25 Datasheet (BAYLI)

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

Precision Micro power Voltage Reference

B4041

Pin Connection

Ordering Information

Devices Package Temp.

B4041YZ-X TO-92

-40°C to +85°C

B4041YM-X SO-8

-40°C to +85°C

B4041YK-X SOT-23

-40°C to +85°C

Y=

A=100ppm/°C B=150ppm/°C

X=

1=0.5% 2=1% 3=2%

Description

The B4041 is a two-terminal, temperature compensated, band-gap voltage reference, which provides a fixed

1.25V output for input currents between 500 µA to 5mA. The bandgap voltage (1.225V) is independently laser trimmed from the output voltage to achieve a very low tempco, then the output voltage is laser trimmed to

1.225 volts. This trimming technique and the low tempco (A grade 50 ppm/ °C) thin film resistor process gives a very stable device over the full temperature range. The B4041 is available in the sub-miniature (3mm × 1.3mm) SOT-23, SO-8 surface mount package, or TO-92 package. The operating temperature is -40°C to 85°C.

The Bay Linear B4041 advanced design eliminates the need for an external stabilized capacitor while insuring stability with any capacitive load, making them easy to use.

Features

• Low Temp. Coefficient 50 ppm/◦C

• Operating Current Range of 100µA to 15mA

• Low power 250mW @I

IN

=100mA

• Small package: SOT-23, TO-92, SO-8

• Output Voltage Tolerance of ±0.5%

• Similar Replacement for LM4041

Applications

• Constant Current Source

• Digital Voltmeter

• Power Supply Monitor

• Battery Powered Equipment

• Data Acquisition Systems

• Energy Management

Bay Linear

Inspire the Linear Power

1

2

3

45

6

7

8

_

NC

+

NC

Top View

8-Pin Surface Mount

1

2

Bottom View

TO-92

Plastic Package

3

Front View

2

3

+

_

1

SOT-23

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B4041

ABSOLUTE MAXIMUM RATINGS

Reverse Current............................................................... 20mA Power Dissipation at 25°C

Forward Current .............................................................. 10mA K Package………………300mW

Storage Temperature....................................... -65°C to +150°C Z Package……………….550mW

Lead Temperature Temperature Range…-40°C ≤ T

A

≤ +85°C

K Package .......................................................+215°C

Z Package ........................................................+260°C

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at IIN = 1000µA, and TA = +25°C unless otherwise noted. . Boldface limits apply over temperature.

Parameter Condition

B4041A-1

Min Type Max

B4041B-1

Min Type Max

B4041C-1

Min Type Max

Unites

Rev; Brek. Voltage

I

R

=500 µA

1.25 1.25 1.25 V

Rev. Brek tolerance

I

R

=500 µA

±12 ±29

mV mV

Output Impedance

0.60

0.3

2

0.9

0.60

0.3

2

1.1

0.60

0.3

2

1.1

Ω

Noise Voltage

0.1kHz≤f ≤10Hz

15 15 15

µV p-p

Tempco Note 1 100 150 150

ppm/°C Turn-on Setting

0.1% of V

OUT

30 30 30

µSec

Operating Current

Note 2 0.1 5

15

0.1 5 15

mA

Temp. Range

-40 85 -40 85 -40 85

°C

Parameter Condition

B4041A-2

Min Type Max

B4041B-2

Min Type Max

B4041C-2

Min Type Max

Unites

Rev; Brek. Voltage

I

R

=500 µA

1.25 1.25 1.25 V

Rev. Brek tolerance

I

R

=500 µA

±25 ±49

mV mV

Output Impedance

0.60 2 0.60 2 0.60 2

Ω

Noise Voltage

0.1kHz≤f ≤10Hz

15 15 15

µV p-p

Tempco Note 1 50 100 150

ppm/°C Turn-on Setting

0.1% of V

OUT

30 30 30

µSec

Operating Current

Note 2 0.5 5

15

0.5 5 15

mA

Temp. Range

-40 85 -40 85 -40 85

°C

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B4041

Electrical Characteristics

Parameter Condition

B4041A-3

Min Type Max

B4041B-3

Min Type Max

B4041C-3

Min Type Max

Unites

Rev; Brek. Voltage

I

R

=500 µA

1.25 1.25 1.25 V

Rev. Brek tolerance

I

R

=500 µA

±50 ±74

mV mV

Output Impedance

0.60 2 0.60 2 0.60 2

Ω

Noise Voltage

0.1kHz≤f ≤10Hz

15 15 15

µV p-p

Tempco Note 1 50 100 150

ppm/°C Turn-on Setting

0.1% of VOUT

30 30 30

µSec

Operating Current

Note 2 0.1 5

15

0.1 5 15

mA

Temp. Range

-40 85 -40 85 -40 85

°C

Note: 1) Three-point measurement guarantees the error band over the specified temperature range.

2) Optimum performance is obtained at currents below 1000 µA.

3) Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation using

B4041 Applications Hints

This device is designed for stable operation and has no need of an external capacitor between pin 4 and 8. The reference remains stable if a bypass capacitor is used.

SOT-23

The B4041 in the SOT-23 package has a parasitic Schottky diode between pin 3 and pin 1. Pin 1 of SOT-23 must float or be connected to pin 3.

Conventional Shunt Regulator In a conventional shunt regulator application (see Figure 1), an external series resister (R

S

) is connected between the supply voltage and the B4041. R

S

determines the current that flows

through the load (I

L

) and the reference(IQ). Since

load current and supply voltage may vary, R

S

should be small enough to supply at least the minimum acceptable I

Q

to the reference 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 I

L

is at

its minimum, R

S

should be large enough so that the current flowing through the B4041-x.x is less than 15mA

RS is determined by the supply voltage (VS), the load and operating current (I

L

and IQ), reference’s reverse

breakdown voltage (V

R

).

RS = (VS - VR)/(IL+IQ)

V

S

R

S

V

R

I

L

I

Q

IO + I

L

V

O

AS4041

tt

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation.

Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.

The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.

LIFE SUPPORT AND NUCLEAR POLICY

Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President.