ZRA124
PRECISION 1.24 VOLT MICROPOWER VOLTAGE REFERENCE
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
SCHEMATIC DIAGRAM
APPLICATIONS
•
Battery powered and portable equipment
•
Metering and measurement systems
•
Instrumentation
•
Precision power supplies
•
Test equipment
•
Data acquisition systems
TOP VIEW
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
DEVICE
ZRA124F01TA
TOL %
1
REEL
SIZE
7”
TAPE
WIDTH
8mm
REEL
QUANTITY
3,000
PART
MARK
12C
ISSUE 3 - JUNE 2004
1
SEMICONDUCTORS
ZRA124
ABSOLUTE MAXIMUM RATING
Reverse current
Forward current
Operating temperature
Storage temperature
25mA
SOT23
25mA
-40 to 85°C
-55 to 125°C
330mW
Power dissipation (T
amb
= 25°C)
ELECTRICAL CHARACTERISTICS TEST CONDITIONS
(Unless otherwise stated) T
amb
=25°C
SYMBOL
PARAMETER
CONDITIONS
LIMITS
MIN. TYP.
V
R
I
MIN
I
R
T
C (1)
R
S (2)
Z
R
Reverse breakdown voltage
Minimum operating current
Recomended operating current
Average reverse breakdown
voltage temp. co.
Slope resistance
Reverse dynamic impedance
I
R
= 1mA
f = 100Hz
1
AC
= 0.1IR
I
R
= 150 A
f = 100Hz to
10kHz
I
R
(min) to
I
R
(max)
0.05
30
0.65
0.5
I
R
= 150 A
1.228
1.24
30
MAX.
1.252
50
5
90
2
1
1
V
A
mA
ppm/°C
TOL %
UNITS
E
N
Wideband noise voltage
40
V(rms)
NOTES:
(1)
T
C
=
(2)
R
S
=
V
R
Change x
1000000
V
R
x Temperature Change
V
R
Change
(
I
R
(min)
to I
R
(max))
I
R
(max)
−
I
R
(min)
ISSUE 3 - JUNE 2004
SEMICONDUCTORS
2
ZRA124
PACKAGE OUTLINE
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE DIMENSIONS
Millimeters
DIM
A
B
C
D
F
G
0.37
0.085
Min
2.67
1.20
Max
3.05
1.40
1.10
0.53
0.15
0.015
0.0034
Inches
Min
0.105
0.047
Max
0.120
0.055
0.043
0.021
0.0059
DIM
H
K
L
M
N
Millimeters
Min
0.33
0.01
2.10
0.45
Max
0.51
0.10
2.50
0.64
Inches
Max
0.013
0.0004
0.083
0.018
Max
0.020
0.004
0.0985
0.025
0.95 NOM
0.0375 NOM
1.90 NOM
0.075 NOM
© Zetex Semiconductors plc 2004
Europe
Zetex GmbH
Streitfeldstraße 19
D-81673 München
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
ISSUE 3 - JUNE 2004
SEMICONDUCTORS
4
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