ZRT100
9.8V LOW POWER PRECISION REFERENCE SOURCE
DESCRIPTION
The ZRT100 is a monolithic integrated circuit providing
a precise stable reference voltage of 9.8V at 500µA.
The circuit features a knee current of 150µA and
operation over a wide range of temperatures and
currents.
The ZRT100 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 o w n i n Fi g. 1 . Thi s f a c i l i t y i s use 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 two temperature ranges
• 1 and 2% initial voltage tolerance versions
available
• No external stabilising capacitor required in most
cases
• Low slope resistance
SOT223
Package suffix G
• SOT223 small outline package
Top view (pin 4 floating or
connected to pin 2)
ORDERING INFORMATION
DEVICE
TOL%
OPERATING
TEMP.
PACKAGE
PARTMARK
ZRT100GC2
2
-40 to 85°C
SOT223
ZRT100C2
ZRT100GC1
1
-40 to 85°C
SOT223
ZRT100C1
ZRT100GA1
1
-55 to 125°C
SOT223
ZRT100A1
A grade
C grade
-55°C to 125°C
-40°C to 85°C
ISSUE 3 - DECEMBER 2003
1
SEMICONDUCTORS
ZRT100
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
LIMIT
UNIT
30
mA
A grade
-55 to 125
°C
C grade
-40 to 85
°C
-55 to 150
°C
Reverse current
(1)
Operating temperature:
T OMP
Storage temperature
(1)
T STG
Above 25°C this figure should be linearly derated to 6mA at 125°C
POWER DISSIPATION (at Tamb = 25°C unless otherwise stated)
PACKAGE
VALUE
SOT223
2
UNIT
W
TEMPERATURE DEPENDENT ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
INITIAL
VOLTAGE
TOLERANCE %
GRADE A
GRADE C
TYP
MAX
TYP
MAX
UNIT
∆V R
Output voltage change over
relevant temperature
range(See note (a))
1&2
27.0
90.0
10.8
34.4
mV
TCVR
Output voltage temperature
coefficient (See note (b))
1&2
15.0
50.0
15.0
50.0
ppm/°C
ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated)
SYMBOL
PARAMETER
VR
Output voltage
1% tolerance (A1,C1)
CONDITIONS
MIN.
TYP.
I R =500A
9.70
9.60
2% tolerance (C2)
⌬V TRIM
Output voltage adjustment range
T C ⌬V TRIM
Change in T C V R with output adjustment
IR
Operating current range
t on
t off
Turn-on time
Turn-off time
e np-p
RS
MAX.
UNIT
9.80
9.90
V
9.80
10.00
⫾5
R T =100k⍀
5.0
See note (c)
0.15
V
%
ppm/°C/%
30
mA
R L =1k⍀
400
0.3
s
Output voltage noise
(over the range 0.1 to 10Hz)
Peak to peak
measurement
50
V
Slope resistance
I R = 0.5mA to
5mA
See note (d)
1.8
4.0
⍀
ISSUE 3 - DECEMBER 2003
SEMICONDUCTORS
2
ZRT100
TYPICAL CHARACTERISTICS
NOTES:
(a) Output change with temperature
(d) Slope resistance (RS)
The absolute maximum difference between the
maximum output voltage and the minimum output
voltage over the specified temperature range:
The slope resistance is defined as:
RS =
⌬VR=Vmax-Vmin
change inV R
specific current range
⌬I=5-0.5=4.5mA (typically)
(b) Output temperature coefficient (TCVR)
(e) Line regulation
The ratio of the output change with temperature to the
specified temperature range expressed in ppm/°C:
The ratio of change in output voltage to the change in
input voltage producing it:
∆V R x 10 6
TCV R =
ppm °C
V R x∆T
RS x 100
%/V
V R x RSOURCE
⌬T= Full temperature range
(c) Operating current (IR)
Maximum operating current must be derated as
indicated in maximum ratings.
ISSUE 3 - DECEMBER 2003
3
SEMICONDUCTORS
ZRT100
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 3 - DECEMBER 2003
SEMICONDUCTORS
4
ZRT100
PACKAGE OUTLINE
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE DIMENSIONS
Millimeters
Inches
DIM
Millimeters
Inches
DIM
Min
Max
Min
Max
Min
Max
Min
Max
A
–
1.80
–
0.071
e
2.30 BSC
0.0905 BSC
A1
0.02
0.10
0.0008
0.004
e1
4.60 BSC
0.181 BSC
b
0.66
0.84
0.026
0.033
E
6.70
7.30
b2
2.90
3.10
0.114
0.122
E1
3.30
C
0.23
0.33
0.009
0.013
L
0.90
D
6.30
6.70
0.248
0.264
–
0.264
0.287
3.70
0.130
0.146
–
0.0355
–
–
–
–
© Zetex plc 2003
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Telephone (44) 161 622 4444
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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 - DECEMBER 2003
5
SEMICONDUCTORS
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