ZRT025
2.5V LOW POWERPRECISION REFERENCE SOURCE
DESCRIPTION
The ZRT025 is a monolithic integrated circuit providing
a precise stable reference voltage of 2.5V at 500 A.
The circuit features a knee current of 150 A and
operation over a wide range of temperatures and
currents.
Th e ZR T025 i s avai la b le f or s u rf a ce mo u n t
applications. This product offers a trim facility whereby
the output voltage can be adjusted as shown in Fig.1.
This facility is used when compensating for system
errors or setting the reference output to a particular
value. When the trim facility is not used, the pin should
be left open circuit.
SOT223
FEATURES
•
Trimmable output
•
Excellent temperature stability
•
Low output noise figure
•
Available in two temperature ranges
•
1 and 2% initial voltage tolerance versions available
•
No external stabilizing capacitor required in most cases
•
Low slope resistance
•
No derating required at low temperatures
•
SOT223 package
SOT223
Package suffix G
Top view (pin 4 floating or
connected to pin 2)
ORDERING INFORMATION
DEVICE
ZRT025GC2TA
ZRT025GC1TA
ZRT025GA1TA
TOL%
2
1
1
OPERATING TEMP °C
-40 to 85
-40 to 85
-55 to 125
PARTMARK
ZRT025C2
ZRT025C1
ZRT025A1
REEL
SIZE
7”
7”
7”
TAPE
WIDTH
12mm
12mm
12mm
QUANTITY
PER REEL
1,000 units
1,000 units
1,000 units
A grade
C grade
-55 to 125°C
-40 to 85°C
ISSUE 4 - DECEMBER 2003
1
SEMICONDUCTORS
ZRT025
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Reverse current
A grade
C grade
Storage temperature
(1)
(1)
SYMBOL
LIMIT
75
UNIT
mA
°C
°C
°C
Operating temperature:
T
OMP
-55 to 125
-40 to 85
T
STG
-55 to 150
Above 72°C this figure should be linearly derated to 25mA at 125°C
POWER DISSIPATION
(at T
amb
= 25°C unless otherwise stated)
PACKAGE
SOT223
VALUE
2
UNIT
W
TEMPERATURE DEPENDENT ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
INITIAL
VOLTAGE
TOLERANCE %
1&2
GRADE A
-55 TO 125°C
6.8
22.5
GRADE C
-40 TO 85°C
2.7
8.8
UNIT
∆V
R
Output voltage change over
relevant temperature
range(See note (a))
Output voltage temperature
coefficient (See note (b))
mV
T
C
V
R
1&2
15.0
50.0
15.0
50.0
ppm/°C
ELECTRICAL CHARACTERISTICS
(at T
amb
= 25°C unless otherwise stated)
SYMBOL
V
R
PARAMETER
Output voltage
1% tolerance (A1,C1)
2% tolerance (C2)
V
TRIM
T
C
V
TRIM
I
R
t
on
t
off
e
np-p
R
S
Output voltage adjustment range
Change in T
C
V
R
with output adjustment
Operating current range
Turn-on timeTurn-off time
R
L
=1k
R
T
=100k
0.15
10
0.3
50
0.85
2.0
I
R
=500 A
2.475
2.450
2.500
2.500
5
2.5
75
2.525
2.550
V
V
%
ppm/°C/%
mA
s
V
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Output voltage noise (over the range 0.1 Peak to peak
to 10Hz)
measurement
Slope resistance
I
R
= 0.5mA to
5mA
(See note (c))
ISSUE 4 - DECEMBER 2003
SEMICONDUCTORS
2
ZRT025
TYPICAL CHARACTERISTICS
NOTES:
(a) Output change with temperature
The absolute maximum difference between the
maximum output voltage and the minimum output
voltage over the specified temperature range
(c) Slope resistance (RS)
The slope resistance is defined as :
RS
=
V
R
=V
max
-V
min
(b) Output temperature coefficient (T
C
V
R
)
The ratio of the output change with temperature to the
specified temperature range expressed in ppm/°C
changeinV
R
specificcurrentrange
I=5-0.5=4.5mA (typically)
(d) Line regulation
The ratio of change in output voltage to the change in
input voltage producing it.
T
C
V
R
=
∆
V
R
x
10
ppm
°
C
V
R
x
∆
T
6
T= Full temperature range
ISSUE 4 - DECEMBER 2003
3
R
S
x
100
%/
V
V
R
xR
SOURCE
SEMICONDUCTORS
ZRT025
SCHEMATIC DIAGRAM
Figure 1:
This circuit will allow the reference to be trimmed over
a wide range. The device is specified over a 5% trim
range.
ISSUE 4 - DECEMBER 2003
SEMICONDUCTORS
4
ZRT025
PACKAGE OUTLINE
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE DIMENSIONS
Millimeters
DIM
Min
A
A1
b
b2
C
D
–
0.02
0.66
2.90
0.23
6.30
Max
1.80
0.10
0.84
3.10
0.33
6.70
Min
–
0.0008
0.026
0.114
0.009
0.248
Max
0.071
0.004
0.033
0.122
0.013
0.264
e
e1
E
E1
L
Inches
DIM
Min
Max
Min
Max
2.30 BSC
4.60 BSC
6.70
3.30
0.90
–
7.30
3.70
–
–
0.0905 BSC
0.181 BSC
0.264
0.130
0.0355
–
0.287
0.146
–
–
Millimeters
Inches
© Zetex plc 2003
Europe
Zetex plc
Fields New Road
Chadderton
Oldham, OL9 8NP
United Kingdom
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
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
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Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
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Zetex (Asia) Ltd
3701-04 Metroplaza Tower 1
Hing Fong Road
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Hong Kong
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@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 4 - DECEMBER 2003
5
SEMICONDUCTORS
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