300144Z, 300145Z (Z-Foil)
Vishay Foil Resistors
Bulk Metal
®
Foil Technology Ultra High Precision Z-Foil Voltage Divider
Resistors with TCR Tracking to 0.1 ppm/°C, Power Coefficient Tracking
of 5 ppm at Rated Power, and Tolerance Match to 0.005 % (50 ppm)
FEATURES
APPLICATIONS
Instrumentation amplifiers
Bridge networks
Differential amplifiers
Military
Space
Medical
Automatic test equipment
Down-hole (high temperature)
V
1
V
2
R
1
R
3
R
4
-
+
R
2
300144
300145
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TABLE 1A - MODELS 300144Z AND
300145Z SPECIFICATIONS
ABSOLUTE
TOLERANCE
± 0.005 %
± 0.01 %
RESISTANCE
VALUES
ABSOLUTE TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
TYPICAL AND MAX. SPREAD
± 0.2 ppm/°C ± 1.8 ppm/°C
500
to 20 k
100
to < 500
TABLE 1B - MODELS 300144Z AND
300145Z SPECIFICATIONS
TOLERANCE
MATCH
0.005 %
RESISTANCE
RATIO
1:1
TCR TRACKING MAX.
0.5 ppm/°C
> 1:1 to 4:1
0.75 ppm/°C
1.0 ppm/°C
1.5 ppm/°C
> 4:1 to 10:1
> 10:1
0.01 %
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63115
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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Tolerance: absolute and matching to 0.005 % (50 ppm)
V
out
Temperature coefficient of resistance (TCR):
absolute: ± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
TCR tracking: 0.1 ppm/°C typical
Power coefficient tracking “R due to self heating”: 5 ppm
at rated power
Power rating: 0.2 W at 70 °C, for the entire resistive
element R
1
and R
2
, divided proportionally between the two
values
Load life ratio stability: < 0.005 % (50 ppm) 0.2 W at 70 °C
for 2000 h
Maximum working voltage: 200 V
Resistance range: 100R to 20K per resisitve element
Foil resistors are not restricted to standard values/ratios;
specific “as requested” values/ratios can be supplied at no
extra cost or delivery (e.g. 1K2345 vs. 1K)
Electrostatic discharge (ESD) up to 25 000 V
Non-inductive, non-capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
Thermal EMF: 0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Terminal finish: lead (Pb)-free or tin/lead alloy
Compliant to RoHS directive 2002/95/EC
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
For better performances please contact us
300144Z, 300145Z (Z-Foil)
Vishay Foil Resistors
INTRODUCTION
Possibly you have become so accustomed (and inured) to a
slight instability or drift in your equipment that you no longer
regard the problem as a soluble. You have learned to live
with it. But have your customers? They are still waiting for a
solution. And if you cannot provide one, someone else may.
There are so many stability problems directly traceable to
resistive devices that skimping on the quality of a few critical
resistors, resistive networks may be counterproductive.
Load Life Stability
Load Life stability is the characteristics most relied upon to
demonstrate resistor long term reliability. Many applications
require a load life of between 2000 h to 10 000 h with limits
on the amount of shift and the number of failure rate
demonstration.
The ultra high precision Z-Foil divider and network have the
tightest allowable limits.
Whether high reliable application or not, the load life stability
of Foil resistors is unparalleled and long term serviceability is
assured.
With Bulk Metal
®
Foil resistors, only a minimal shift in
resistance value will occur during its entire lifetime. Most of
this shift takes place during the first few hundred hours of
operation, and virtually no change is noted thereafter.
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Temperature Coefficient of Resistance (TCR)
The low temperature coefficient of resistors are achieved by
the use of especially selected materials for the resistive and
insulating members of the resistors which self-compensate
the thermal coefficient of expansion.
Interloop
Capacitance
Reduction
in Series
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Ratio Stability
Resistors in dividers or networks form are called upon to
maintain a track and match more than at ambient
temperature and when they expose to stress factors before,
during and after the assembly. Throughout the long service
life of the equipment, the resistors around the op amplifier for
example are required to track (to hold ratio) even though the
dissipation in the feedback resistor is different than that in the
sense resistor, causing on one to be at higher temperature
than the other. This is called tracking under power for short
term (power coefficient of resistance) or for a long term (load
life stability).
Change in a metal’s resistivity occurs in two ways: by
changes in temperature (external and internal) and by
changes in mechanical strain.
By developing resistor element materials whose resistances
change positively when subjected to temperature increase,
and negativity when subjected to compression, the Foil
resistors achieved, in the temperature range - 55 °C to + 125
°C, a maximum absolute TCR of 5 ppm/°C for the classical
Foil and maximum 2 ppm/°C for the Z-Foil technology.
To achieve maximum optimum TC tracking between
resistors, all factors that affect the TCR of each resistor must
be uniform. Whatever their resistance range or wattage, all
Foil resistors exhibit identical temperature coefficients as all
are made of the same alloy and of identical physical and
electrical characteristics. The only variable between these
resistors is the pattern photoetched on the element, a
process that does not alter alloy properties in any way. In
resistors, all TCR and other electrical characteristics are
inherent to the alloy, and are therefore uniform between
individual resistors, as well as between batches, thus
accurate “tracking” of one style resistor to another is assured
(even if they differ in size and range). Data on TCR spread
shown (fig. 4) illustrate the excellent tracking available with
all Foil resistors.
Because of this excellent tracking ability, resistors are ideal
for use in resistor networks where accurate ratios must be
maintained over a wide temperature range.
This designed-in TCR uniformity contrasts sharply with the
TCR tracking capability of wirewound and conventional
metal film units. TCR characteristics between wirewounds of
different resistance ranges and wattage are highly
non-uniform, because (a) different wire diameters are used,
(b) winding-induced stresses-which have a direct bearing on
TCR.
Conventional metal films units offer quite variable and often
unpredictable TC tracking because composition, film
thickness, and deposition techniques are varied to meet
different resistance range and wattage requirements.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications. Please
contact us.
FIGURE 1 - TRIMMING TO VALUES
(conceptual illustration)
Note:
Foil shown in
black,
etched spaces in
white
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Document Number: 63115
Revision: 25-Mar-10
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Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
300144Z, 300145Z (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - STANDARD PRINTING AND DIMENSIONS
in inches (millimeters)
Model 300144Z and Schematic
(2)
0.295
(7.49)
VISHAY
9825
300144Z
0.1
(2.54)
Match
Tolerance
10K000
0.01
%
10K000
6
Model 300145Z and Schematic
(2)(3)
0.375
(9.53)
5
4
0.2
(5.08)
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R
2
Date Code
Model No.
0.015 ± 0.005
(0.38 ± 0.13)
0.025 ± 0.005
(0.64 ± 0.13)
0.320
(8.13)
R
1
6
5
4
1
Low
Resistance
Value
Indicator
R
4
R
3
1
2
3
Date Code
Model No.
VISHAY
9825
300145Z
0.375
(9.53)
0.015 ± 0.005
(0.38 ± 0.13)
10K000
0.01
%
10K000
0.75
(1)
(19.05)
R
1
R
2
1
2
3
Dimensional Tolerance: ± 0.010" (0.25)
0.1 (2.54)
(1)
0.025 ± 0.005
(0.64 ± 0.13)
0.75
(1)
(19.05)
Match
Tolerance
1
2
3
(2)
(3)
Lead wires: #22 AWG solder coated copper,
0.75" minimum length
Each divider pair consists of two resistors on one
single chip
For model 300145Z the 2 chips are independent
and with no special relationship from chip to chip
1
2
3
0.1 (2.54)
FIGURE 3 - POWER DERATING CURVE
300144Z, 300145Z
- 55 °C
+ 70 °C
Rated Power
FIGURE 4 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
(for more details see table 1A)
100
%
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75
%
50
%
25
%
Percent of Rated Power at + 70 °C
TCR Chord Slopes for Different Temperature Ranges
+ 500
+ 400
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
Recommended
operation for
< 150 ppm
ΔR
Δ
after 2000 h
load life
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
0
- 75
- 50
- 25
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
Ambient Temperature (°C)
Note
• Power is divided proportionally between the 2 values
Document Number: 63115
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
300144Z, 300145Z (Z-Foil)
Vishay Foil Resistors
TABLE 2 - GLOBAL PART NUMBER INFORMATION
(1)
NEW GLOBAL PART NUMBER: Y1691V0058QT9L (preferred part number format)
DENOTES PRECISION
Y
VCODE
RESISTANCE
VALUE CODE
TOLERANCE MATCH
V
= 0.005 %
T
= 0.01 %
Q
= 0.02 %
A
= 0.05 %
B
= 0.1 %
D
= 0.5 %
F
= 1.0 %
PACKAGING
L
= bulk pack
Y
1
6
9
1
V
PRODUCT CODE
1691
= 300144Z
1735
= 300145Z
RESISTANCE TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1691 V0058 Q T 9 L:
TYPE: 300144Z
VALUES: 2K/20K
ABSOLUTE TOLERANCE: ± 0.02 %
TOLERANCE MATCH: 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
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HISTORICAL PART NUMBER: 300144ZT 2K/20K TCR0.2 Q T B (will continue to be used)
300144Z
MODEL
T
2K/20K
TCR0.2
Q
ABSOLUTE
TOLERANCE
V
T
Q
A
B
D
F
= ± 0.005 %
= ± 0.01 %
= ± 0.02 %
= ± 0.05 %
= ± 0.1 %
= ± 0.5 %
= ± 1.0 %
T
TOLERANCE
MATCH
V
= 0.005 %
T
= 0.01 %
Q
= 0.02 %
A
= 0.05 %
B
= 0.1 %
D
= 0.5 %
F
= 1.0 %
B
PACKAGING
B
= bulk pack
TERMINATION
OHMIC VALUE
R
1
= 2 k
R
2
= 20 k
R
3
(2)
R
4
(2)
TCR
CHARACTERISTIC
300144Z
300145Z
T
= lead (Pb)-free
None
= tin/lead alloy
Notes
(1)
For non-standard requests, please contact application engineering
(2)
For 300145 please specify the resistance value for each resistor even if all values are equal
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0
0
5
8
Q
T
9
L
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
Document Number: 63115
Revision: 25-Mar-10
300144Z, 300145Z (Z-Foil)
Vishay Foil Resistors
TABLE 3 - EXAMPLES OF VCODES FOR POPULAR VALUES
(other values available on request)
300144 RATIOS
VCODES
V0009
V0010
V0100
V0055
V0223
V0097
V0001
V0042
V0006
V0166
V0226
V0003
V0013
V0107
V0014
V0160
V0159
V0005
V0002
V0373
V0026
V0156
R
1
20K
20K
20K
19K4
17K5
15K
10K
10K
10K
10K
9K
9K
8K
6K
6K
6K
5K5
5K
R
2
20K
10K
2K
9K7
20K
15K
10K
8K323
2K
15K
10K
1K
16K
20K
7K
6K
7K7
VCODES
V0058
V0030
V0029
V0059
V0103
V0154
V0032
V0121
V0004
V0379
V0374
V0022
V0091
V0162
V0378
V0061
V0088
R
1
2K
2K
2K
2K
2K
1K5
1K
1K
1K
1K
800R
511R
500R
500R
500R
300R
100R
R
2
20K
18K
4K
VCODES
V0008
V0019
R
1
10K
5K
300145 RATIOS
R
2
10K
5K
R
3
10K
5K
R
4
10K
5K
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10K
5K
V0380
100R
5K
V0375
100R
4K
3K
3K
12K
V0381
100R
50R
19K2
6K
V0377
V0376
-
35R
-
V0158
2K7
10K
Note
• A combination of these values are available in reverse order and in values up to 5 digits
Document Number: 63115
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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V0092
1K
7K812
500R
8K8
7K812
500R
1K
2K
V0023
500R
500R
8K8
3K
V0047
100R
100R
3K
V0051
100R
10K
100R
10K
16K
2K
V0051
100R
10K
100R
10K
V0227
-
350R
-
350R
-
350R
-
350R
-
1K
7K
-
-
-
-
-
800R
16K2
-
-
-
-
-
-
-
-
-
-
500R
15K
-
-
-
-
-
-
-
-
-
-
4K5
-
-
-
-
-
300R
100R
15K
12K3
50R
28K
20K
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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