ZRA125
PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE
DESCRIPTION
The ZRA125 uses a bandgap circuit design to achieve a
precision micropower voltage reference of 1.25 volts.
The device is available in small outline surface mount
packages, ideal for applications where space saving is
important.
The ZRA125 design provides a stable voltage without
an external capacitor and is stable with capacitive
loads. The ZRA125 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 a suggested
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
•
No stabilizing capacitor required
•
Typical T
C
30ppm/°C
•
Typical slope resistance 0.65
•
± 3% and 2% tolerance
•
Industrial temperature range
•
Operating current 50 A to 5mA
•
Transient response, stable in less than 10 s
•
Small outline SOT23 package
APPLICATIONS
•
Battery powered and portable equipment
•
Metering and measurement systems
•
Instrumentation
•
Data acquisition systems
•
Precision power supplies
SCHEMATIC DIAGRAM
•
Test equipment
ISSUE 3 - MARCH 2004
1
SEMICONDUCTORS
ZRA125
ABSOLUTE MAXIMUM RATINGS
Reverse current
Forward current
Operating temperature
Storage temperature
25mA
25mA
-40 to 85°C
-55 to 150°C
POWER DISSAPATION (T
amb
= 25°C)
SOT23
330mW
ELECTRICAL CHARACTERISTICS
(at T
amb
= 25°C unless otherwise stated)
SYMBOL PARAMETER
V
R
I
MIN
I
R
T
C (1)
R
S (2)
Z
R
Reverse breakdown voltage
Minimum operating current
Recommended operating
current
Average reverse breakdown
voltage temp. co.
Slope resistance
Reverse dynamic impedance
I
R
= 1mA
f = 100Hz
I
AC
= 0.1I
R
I
R
= 150 A
f = 100Hz to
10kHZ
I
R
(min) to
I
R
(max)
0.05
30
0.65
0.5
CONDITIONS MIN.
I
R
= 150 A
1.225
1.21
TYP.
1.25
1.25
30
MAX.
1.275
1.29
50
5
90
2
1
TOL %
2
3
UNITS
V
V
A
mA
ppm/°C
E
N
Wideband Noise Voltage
40
V(rms)
NOTES:
(1)
T
C
=
V
R
change x
1000,000
,
V
R
X temperature change
T
C
is a characterized parameter not measured on
individual devices.
(2)
R
S
=
V
R
change
(
I
R
(min)
to
(min)
to I
R
(max))
I
R
(max)
−
I
R
(min)
ISSUE 3 - MARCH 2004
SEMICONDUCTORS
2
ZRA125
TYPICAL CHARACTERISTICS
ISSUE 3 - MARCH 2004
3
SEMICONDUCTORS
ZRA125
CONNECTION DIAGRAM
Package Suffix - F
TOP VIEW
Pin 1 floating or connected to pin 2
ORDERING INFORMATION
Part Number
ZRA125F02TA
ZRA125F03TA
Tol %
2
3
Package
SOT23
SOT23
Part Mark
12B
12A
Reel Size
7”
7”
Quantity per reel
3,000
3,000
ISSUE 3 - MARCH 2004
SEMICONDUCTORS
4
ZRA125
PACKAGE OUTLINE
PAD LAYOUT DETAILS
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 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 Headquaters
Zetex plc
Fields New Road, Chadderton
Oldham, OL9 8NP
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 - MARCH 2004
5
SEMICONDUCTORS
