ZRT040
4.01V LOW POWER PRECISION REFERENCE SOURCE
DESCRIPTION
The ZRT040 is a monolithic integrated circuit providing
a precise stable reference voltage of 4.01V at 500µA.
The circuit features a knee current of 150µA and
operation over a wide range of temperatures and
currents.
The ZRT040 is available in a SOT223 package for
surface mount applications. This device offers a trim
facility whereby the output voltage can be adjusted as
s h ow n i n Fi g. 1. T hi s f a c i li t y is u se d w h e n
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 three temperature ranges
•
1 and 2% initial voltage tolerance versions
available
•
No external stabilising capacitor required in
most cases
•
Low slope resistance
•
SOT223 small outline packages
SOT223
Package suffix G
Top view (pin 4 floating or
connected to pin 2)
ORDERING INFORMATION
DEVICE
ZRT040GC2
ZRT040GC1
ZRT040GA1
TOL%
2
1
1
OPERATING
TEMP.
-40 to 85°C
-40 to 85°C
-55 to 125°C
PACKAGE
SOT223
SOT223
SOT223
PARTMARK
ZRT040C2
ZRT040C1
ZRT040A1
A grade
C grade
-55°C to 125°C
-40°C to 85°C
ISSUE 4 - DECEMBER 2003
1
SEMICONDUCTORS
ZRT040
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 25°C this figure should be linearly derated to 15mA 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
TYP
11.0
MAX
36,0
GRADE C
TYP
7.5
MAX
24.0
mV
UNIT
∆V
R
Output voltage change over
relevant temperature
range(See note (a))
Output voltage temperature
coefficient (See note (b))
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 time
Turn-off time
R
L
=1k
R
T
=100k
0.15
40
0.3
50
1.1
3.0
I
R
=500 A
3.97
3.93
4.01
4.01
5
2.5
75
4.05
4.09
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
ZRT040
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:
(d) 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)
(e) 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
(c) Operating current (I
R
)
Maximum operating current must be derated as
indicated in maximum ratings.
ISSUE 4 - DECEMBER 2003
3
R
S
x
100
%/
V
V
R
xR
SOURCE
SEMICONDUCTORS
ZRT040
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
ZRT040
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
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For the latest product information, log on to
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ISSUE 4 - DECEMBER 2003
5
SEMICONDUCTORS