1
S E M I C O N D U C T O R S
DEVICE DESCRIPTION
The ZRA124 uses a bandgap circuit design to achieve a
precision micropower voltage reference of 1.24 volts.
The device is available in a small outline surface mount
packages, ideal for applications where space saving is
important.
The ZRA124 design provides a stable voltage without
an external capacitor and is stable with capacitive
loads. The ZRA124 is recommended for operation
between 50 A and 5mA and so is ideally suited to low
power and battery powered applications.
Excellent performance is maintained to an absolute
maximum of 25mA, however the rugged design and 20
volt processing allows the reference to withstand
transient effects and currents up to 200mA. Superior
switching capability allows the device to reach stable
operating conditions in only a few microseconds.
FEATURES
Typical T
C
30ppm/C
Typical slope resistance 0.65
1% tolerance
Industrial temperature range
Operating current 50 A to 5mA
No stabilising capacitor required
Transient response, stable in less than 10 s
Small SOT23 package
APPLICATIONS
Battery powered and portable equipment
Metering and measurement systems
Instrumentation
Precision power supplies
Test equipment
Data acquisition systems
ZRA124
ISSUE 3 - JUNE 2004
PRECISION 1.24 VOLT MICROPOWER VOLTAGE REFERENCE
SCHEMATIC DIAGRAM
DEVICE
TOL %
REEL
SIZE
TAPE
WIDTH
REEL
QUANTITY
PART
MARK
ZRA124F01TA
1
7"
8mm
3,000
12C
ORDERING INFORMATION
TOP VIEW
Pin 1 floating or connected to pin 2
ABSOLUTE MAXIMUM RATING
Reverse current
25mA
Forward current
25mA
Operating temperature
-40 to 85C
Storage temperature
-55 to 125C
Power dissipation (Tamb = 25C)
SOT23
330mW
ZRA124
S E M I C O N D U C T O R S
ISSUE 3 - JUNE 2004
2
SYMBOL
PARAMETER
CONDITIONS
LIMITS
TOL %
UNITS
MIN.
TYP.
MAX.
V
R
Reverse breakdown voltage
I
R
= 150 A
1.228
1.24
1.252
1
V
I
MIN
Minimum operating current
30
50
A
I
R
Recomended operating current
0.05
5
mA
T
C
(1)
Average reverse breakdown
voltage temp. co.
I
R
(min) to
I
R
(max)
30
90
ppm/C
R
S
(2)
Slope resistance
0.65
2
Z
R
Reverse dynamic impedance
I
R
= 1mA
f = 100Hz
1
AC
= 0.1IR
0.5
1
E
N
Wideband noise voltage
I
R
= 150 A
f = 100Hz to
10kHz
40
V(rms)
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) T
amb
=25C
NOTES:
(1)
T
V Change x
V
x Temperature Change
C
R
R
=
1000000
(2)
R
V Change I
to I
I
I
S
R
R
R
R
R
=
-
( (min)
(max))
(max)
(min)
ZRA124
S E M I C O N D U C T O R S
ISSUE 3 - JUNE 2004
3
TYPICAL CHARACTERISTICS
ZRA124
S E M I C O N D U C T O R S
4
ISSUE 3 - JUNE 2004
Europe
Zetex GmbH
Streitfeldstrae 19
D-81673 Mnchen
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Americas
Zetex Inc
700 Veterans Memorial Hwy
Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
Asia Pacific
Zetex (Asia) Ltd
3701-04 Metroplaza Tower 1
Hing Fong Road, Kwai Fong
Hong Kong
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
Corporate Headquarters
Zetex plc
Lansdowne Road, Chadderton
Oldham, OL9 9TY
United Kingdom
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
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.
For the latest product information, log on to www.zetex.com
Zetex Semiconductors plc 2004
PACKAGE OUTLINE
Controlling dimensions are in millimeters. Approximate conversions are given in inches
DIM
Millimeters
Inches
DIM
Millimeters
Inches
Min
Max
Min
Max
Min
Max
Max
Max
A
2.67
3.05
0.105
0.120
H
0.33
0.51
0.013
0.020
B
1.20
1.40
0.047
0.055
K
0.01
0.10
0.0004
0.004
C
1.10
0.043
L
2.10
2.50
0.083
0.0985
D
0.37
0.53
0.015
0.021
M
0.45
0.64
0.018
0.025
F
0.085
0.15
0.0034
0.0059
N
0.95 NOM
0.0375 NOM
G
1.90 NOM
0.075 NOM
PACKAGE DIMENSIONS
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