Document Number: 63045
Revision 19-Jul-02
www.vishay.com
90
300144, 300145
Vishay Foil Resistors
THROUGH HOLE
VISHAY FOIL FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
GERMANY +49.9287.710 FAX: +49 9287.70435
ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
ITALY + 39.2.300.11919 FAX: +39.2.300.11999
JAPAN +81.42.729.0661 FAX: +81.42.729.3400
SINGAPORE +65.788.6668 FAX: +65.788.0988
SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
UK +44 191 514 8237 FAX: +44 1953 457 722
USA +1 610 407-4800 FAX: +1 610 640-9081
Bulk Metal
Foil Technology
Small Package, Ultimate Tracking Voltage Dividers
FEATURES
Temperature Coefficient of Resistance:
(See Figures 1 and 2 in data sheet "7 Technical Reasons
to Specify Bulk Metal Foil Resistor Networks.")
TCR Tracking: to 0.5ppm/C
Ratio Stability: < 0.001% (10ppm) under load-life
conditions
Ratio Match Tolerance: to 0.005%
Absolute Tolerance: to 0.005%
MODEL
RESISTANCE
ABSOLUTE
RATIO MATCH
TCR
NUMBER
VALUE*
TOLERANCE
TOLERANCE
TRACKING
300144
R1
= 10K
0.05%
0.01%
0.5 ppm/C
R2
= 10K
0.05%
0.01%
0.5 ppm/C
These voltage dividers are the first choice for accurate and stable division. Two resistors simultaneously etched into a piece of foil
produce the maximum in TCR tracking without the need for curve matching of separate resistors. The size and very small footprint
of the divider 300144 is also very important. This is the smallest foil divider available. A variety of ratios and impedance's are already
tooled and are shown in Table 1 on the following page. Small deviations from the ratios shown can be accommodated in the trim
allowance already included in each side of the divider. Larger departures from the ratios shown may require new artwork.
The 300145 is a pair of 300144 elements back to back in a single molded package. Although performance between dividers is not
quite as good as within each divider, it is the most accurate and stable full bridge or differential gain setting device made.
MODEL
RESISTANCE
ABSOLUTE
RATIO MATCH
TCR
NUMBER
VALUE*
TOLERANCE
TOLERANCE
TRACKING
300145
R1
= 5K
0.01% ABS
0.005% MA
1ppm/C
R2
= 10K
0.01% ABS
0.005% MA
1ppm/C
R3
= 5K
0.01% ABS
0.005% MA
1ppm/C
R4
= 10K
0.01% ABS
0.005% MA
1ppm/C
*Specify the resistance value for each resistor -- even if all values are the same.
TABLE 1 - ORDERING INFORMATION - 300144
*Specify the resistance value for each resistor -- even if all values are the same.
TABLE 2 - ORDERING INFORMATION - 300145
Product may not
be to scale
www.vishay.com
91
300144, 300145
Vishay Foil Resistors
Document Number: 63045
Revision 19-Jul-02
THROUGH HOLE
VISHAY FOIL FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
GERMANY +49.9287.710 FAX: +49 9287.70435
ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
ITALY + 39.2.300.11919 FAX: +39.2.300.11999
JAPAN +81.42.729.0661 FAX: +81.42.729.3400
SINGAPORE +65.788.6668 FAX: +65.788.0988
SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
UK +44 191 514 8237 FAX: +44 1953 457 722
USA +1 610 407-4800 FAX: +1 610 640-9081
(
)
(
)
1. For resistance ratios not shown, contact Vishay's Applications Engineering Department.
The 300144 can be made available in any required ratio between the resistance values of 100 ohms and 20Kohms, such that R1 can be
any value between 100 ohms and 20Kohms and R2 can also be any value between 100 ohms and 20Kohms. New art work is required.
2. Power is proportional to the divider ratio.
Example: In a 300144 (1K/10K dual), the power rating would be 18 mW on the 1K and 182mW on the 10K, for a total of 200mW on
R1 + R2.
R1
R2
P1 =
P
P2 =
P
R1 + R2
R1 + R2
3. Any value from 100 ohms to 20Kohms inclusive is available with some derating of power. (See data sheet "VHD200 and VHD144.")
4. Maximum working voltage is 200 Volts.
RATIO MATCH
AVAILABLE TO
0.005%
TCR TRACKING
AVAILABLE TO
< 0.5ppm/C
For Like Values
< 1.0ppm/C
Standard
POWER
RATING
2, 4
STANDARD RESISTANCE TOLERANCE
0.2W @ +85C (for
the entire resistive
element R1 + R2)
divided proportion-
ally between the
two elements.
ABSOLUTE
AVAILABLE TO
0.005%
RESISTANCE
RATIO
AVAILABLE
1
(
)
100/12.3K
500/500
500/15K
800/800
1K/1K
1K/2K
1.5K/3K
2K/2K
2K/3K
2K/4K
2K/20K
2.7K/10K
3K/6K
5K/5K
5K/10K
5.5K/7.7K
6K/6K
6K/20K
10K/10K
10K/20K
15K/15K
20K/20K
VISHAY
MODEL
300144
and
300145
3
SHELF LIFE
STABILITY
(ppm/yr)
25
Tolerance: 0.010"
1. Lead wires: #22 AWG solder coated copper,
0.75" minimum length.
2. Each resistor contains 1 chip of two resistive
elements.
1
2
3
VISHAY
9825
300144
10K000
0.01%
10K000
1
Low Resistance
Value Indicator
0.295
(7.493)
0.320
(8.128)
Match
Tolerance
Date Code
Model No.
0.751
(19.05)
0.1 (2.54)
0.1
(2.54)
2
3
R2
1
R1
2
3
R2
1
R1
5
4
R3
6
R4
1
2
3
0.375
(9.525)
0.375
(9.525)
0.751
(19.05)
0.1 (2.54)
0.2
(5.08)
6
5
4
VISHAY
9825
300145
10K000
0.01%
10K000
Match
Tolerance
Date Code
Model No.
Model 300144 and Schematic
2
Model 300145 and Schematic
2
FIGURE 1 - STANDARD PRINTING AND DIMENSIONS
in inches (millimeters)
TABLE 3 - MODELS 300144 AND 300145 SPECIFICATIONS
Bulk Metal
Foil Technology
Small Package, Ultimate Tracking Voltage Dividers
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