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FEATURES

 High performance alternative to REF1004,

LT1004 and LM185/385 references

 4A typical knee current

 Small outline SOT23 package

 SO8 and E-Line alternatives available

 20ppm/°C typical temperature coefficient

 Unconditionally stable

 0.5%, 1%, 2% and 3% tolerance

 Contact Zetex marketing for availability of tighter

tolerance devices

APPLICATIONS

 Battery powered equipment

 Precision power supplies

 Portable instrumentation

 Portable communications devices

 Notebook and palmtop computers

 Data acquisition systems

 A/D and D/A converters

 Test equipment

DESCRIPTION

The ZXRE1004 is a 1.22 volt bandgap reference circuit

designed for ultra low current operation, typically 4

A.

The device is available in a SOT23 surface mount

package offering the ultimate in space and power

saving. These features make the ZXRE1004 particularly

suitable for portable and battery powered applications.

SOT23 tolerance selection is available to 0.5% for

precision applications. Excellent performance is

maintained over the 8

A to 20mA operating current

range with a typical temperature coefficient of only

20ppm/°C. The device has been designed to be highly

tolerant of capacitive loads so maintaining excellent

stability.

As well as the SOT23, the ZXRE1004 can offer a pin for

pin compatible alternative to the REF1004, LT1004 and

LM185/385 series of voltage references with SO8 and

E-Line (TO92 style) equivalents .

V

R

G

nd

SOT23 MICROPOWER (4

A) 1.22V VOLTAGE REFERENCE

1

1.5V

27k

1.22V

SCHEMATIC DIAGRAM

APPLICATIONS CIRCUIT

Ultra low quiescent reference from a 1.5V battery

source.

ZXRE1004

ISSUE 2 - JUNE 1999

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ABSOLUTE MAXIMUM RATINGS

Reverse Current

30mA

Forward Current

10mA

Operating temperature.

-40 to 85°C

Storage temperature.

-55 to 125°C

Power Dissipation (T

amb

=25°C)

SOT23

330mW

SO8

625mW

E-Line

500mW

2

ELECTRICAL CHARACTERISTICS

TEST CONDITIONS (Unless otherwise stated) T

amb

=25°C

SYMBOL

PARAMETER

CONDITIONS

LIMITS

TOL.  %

UNITS

MIN

TYP

MAX

V

R

Reverse Breakdown Voltage

I

R

=100

A

1.214

1.208

1.196

1.183

1.22

1.22

1.22

1.22

1.226

1.232

1.244

1.257

0.5 ‡ 

1

2

3

V

I

MIN

Minimum Knee Current

4

8

A 

I

R

Recommended Operating

Current Range

0.008

20

mA 

T

C

  †

Average Reverse Breakdown

Voltage  Temperature

Coefficient

I

R(min)

 to I

R(max)

20

75

ppm/°C  

V

R

I

R

Reverse Breakdown Voltage

change with Current

I

R

=8

A  to 1mA

I

R

=1mA  to 20mA

1

10

mV

mV

Z

R

Reverse Dynamic Impedance

I

=1mA

f =100Hz

I

AC

=0.1 I

R

0.2

0.6



E

N

Wideband Noise Voltage

I

R

=8

A  to 100A 

f=10Hz to 10kHz

60

V(rms) 



0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Reverse Voltage (V)

Reverse Characteristics

0

2

4

6

8

10

R

everse Current (



A)

-40°C

25°C

85°C

           

  

†    T

C

 

V

R

 

max

 



V

R

 



 

m in

 



  x 1000000

V

R

 x 

T

max

 



T

min

 



   

Note: V

R(m ax )

 - V

R(min )

 is the maximum

deviation in reference voltage

measured over the full operating

temperature range.

‡ Note: 0.5% SOT23 only

ZXRE1004

ISSUE 2 - JUNE 1999

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3

TYPICAL CHARACTERISTICS

-40

-20

0

20

40

60

80

Temperature (°C)

Temperature Drift

1.19

1.20

1.21

1.22

1.23

1.24

1.25

Refe

re

n

c

e V

o

lt

ag

e

 (V)

0.01

0.1

1

10

100

Frequency (kHz)

Slope Resistance v Frequency

0.1

1

10

100

S

lope

 R

e

si

st

a

n

ce

 (

)

20mA

1mA

100

A

0

40

80

120

140

Time (

s)

Transient Response

0

0.5

1.5

1.0

10

0

I

in

(

A)

V

(V)

10

A

20mA

0

10

20

30

40

50

60

70

80

90

100

Reference Current (

A)

Noise Voltage

0

10

20

30

40

50

60

70

80

Wi

de

b

a

nd

 N

o

is

e

 (

V)

100

10

1

0.1

0.01

0.001

Reference Current (mA)

Slope Resistance v Current

0

2

4

6

8

10

12

14

S

lope

 R

e

si

st

a

n

ce

 (

)

25°C

-40°C

0.1

1

10

100

1000

Forward Current (mA)

Forward Characteristics

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Fo

rw

ar

d

 V

o

lt

ag

(V

)

85°C

Ϸ

Ϸ

ZXRE1004

ISSUE 2 - JUNE 1999

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4

 Zetex plc.

 Fields New Road, Chadderton, Oldham, OL9-8NP, United Kingdom.

 Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries) 

 Fax: (44)161 622 4420 

Zetex GmbH

Zetex Inc.

Zetex (Asia) Ltd.

These are supported by

Streitfeldstraße 19

47 Mall Drive, Unit 4

3510 Metroplaza, Tower 2

agents and distributors in

D-81673 München

Commack NY 11725

Hing Fong Road, 

major countries world-wide

Germany

USA

Kwai Fong, Hong Kong



Zetex plc 1999

Telefon: (49) 89 45 49 49 0

Telephone: (516) 543-7100

Telephone:(852) 26100 611

Fax: (49) 89 45 49 49 49

Fax: (516) 864-7630

Fax: (852) 24250 494

Internet:http://www.zetex.com

This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any

purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the

right to alter without notice the specification, design, price or conditions of supply of any product or service.

Ordering Information

Device

TOL%

Package

Partmarking

ZXRE1004CF

0.5

SOT23

10D

ZXRE1004DF

1

SOT23

10C

ZXRE1004EF

2

SOT23

10B

ZXRE1004FF

3

SOT23

10A

ZXRE1004DN8  †

1

SO8

ZXRE1004D

ZXRE1004EN8  †

2

SO8

ZXRE1004E

ZXRE1004FN8  †

3

SO8

ZXRE1004F

ZXRE1004DR  †

1

E-Line

ZXRE1004D

ZXRE1004ER  †

2

E-Line

ZXRE1004E

ZXRE1004FR  †

3

E-Line

ZXRE1004F

†Contact Zetex marketing for availability of these package options

NOTE:

for tape and reel options add suffix TA to the part number

eg ZXRE1004DFTA

 SO8 

 Package 

Suffix – N8

 Top 

View 

 SOT23

 Package 

Suffix – F

 Top 

View –

   Pin 1 floating or 

  connected to pin 2

 E-Line, 

pin,Rev 

 Package 

Suffix – R 

 Bottom 

View –  

  Pin 3 floating or

  connected to  pin 1

Connection Diagrams

ZXRE1004

ISSUE 2 - JUNE 1999