Diodes ZXRE1004 User Manual

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ZXRE1004

SOT23 MICROPOWER (4µA) 1.22V VOLTAGE REFERENCE

Description

The ZXRE1004 is a 1.22 volt bandgap reference circuit
designed for ultra low current operation, typically 4μA. 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 precisi on
applications. Excellent performance is maintained over the
8μA 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 an E-Line
(TO92 style) equivalent.

Features

• High performance alternative to REF1004, LT1004 and
LM185/385 references

• 4μA typical knee current

• Small outline SOT23 package

• 20ppm/°C typical temperature coefficient

• Unconditionally stable

• 1% tolerance

• Contact Diodes marketing for availability of tighter
tolerance devices

• “Green molding compound

Pin Assignments

SOT23 Package Suffix - F

Pin 1 floating or connected to pin 2

E-Line, 3 pin, Rev Package Suffix – R

Pin 3 floating or connected to pin 1

(Top View)

OBSOLETE

(Bottom View)

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

Applications Circuit

ZXRE1004

Document number: DS32172 Rev. 4 - 2

www.diodes.com

Schematic Diagram

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June 2010

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Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)

Parameter Rating Unit

Reverse Current 30 mA
Forward Current 10 mA
Operating Temperature -40 to 85 °C
Storage Temperature -55 to 125 °C

Power Dissipation (T
SOT23

AMB

= 25°C)

330 mW

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ZXRE1004

Electrical Characteristics (Test conditions: T

Symbol Parameter Condition Min. Typ. Max.

VR
I

MIN

IR

(*)

T

C

ΔVR
ΔIR

ZR

EN

Notes:

Note: V

voltage measured over the full operating temperature range.

.

ZXRE1004

Document number: DS32172 Rev. 4 - 2

Reverse breakdown voltage

IR = 100µA

Minimum knee current 4 8
Recommended operating current

range
Average reverse breakdown voltage
temperature coefficient

Reverse breakdown voltage change
with current

Reverse dynamic impedance

Wideband noise voltage

– V

(*)

TC =

R(MAX)

(†)

0.5% SOT23 only

(V

R(MAX

- V

V

R

R(MIN)

x (T

) x 1000000

R(MIN

– T

MAX

is the maximum deviation in reference

MIN

)

0.008 20 mA
I

R(MIN)

I

R

IR=1mA to 20mA
I

R

f = 100Hz
I

AC

I

R

f=10Hz to 10kHz

= 25°C, unless otherwise specified.)

amb

1.208

1.183

to I

R(MAX)

=8µA to 1mA

20 75

= 1mA

0.2 0.6

= 0.1IR

=8µA to 100µA

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60

1.22

1.22

1.232

1.257

1

10

Tol.

(%)

Unit

1
3

ppm/°C

mV

µV(rms)

June 2010

© Diodes Incorporated

V

µA

Ω