V5X5Z, V15X5Z (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Bulk Metal
®
Z-Foil Chip Resistors for Use
in Hybrid Circuits with TCR of 0.05 ppm/°C, Tolerance to 0.005 %,
and Load Life Stability of ± 0.01 % for 10 000 h
FIGURE 1 - TRIMMING CHIP RESISTORS
V5X5Z
FEATURES
•
Temperature coefficient of resistance (TCR):
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: to 0.5 ppm/°C
(1)(2)
•
TCR characteristic is accomplished automatically
without selection and regardless of the date of
manufacture - even if years apart
•
Hybrid chips with Z-Foil are also available for high
temperature applications, please contact us for more
details
•
Resistance tolerance:
Absolute: to ± 0.01 % (user trimmable to ± 0.005 %)
Match: to 0.01 %
•
Power rating: 50 mW to 150 mW at + 70 °C
•
Load life stability: ± 0.01 % at + 70 °C, 10 000 h at rated
power
•
Resistance range: 50
Ω
to 30 kΩ (see table 2)
•
Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
•
Short time overload:
≤
0.02 %
•
Electrostatic discharge (ESD) up to 25 000 V
•
Non-inductive, non-capacitive design
•
Rise time: 1 ns effectively no ringing
•
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
•
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
•
Non-inductive: < 0.08 µH
•
Pattern design minimizing hot spots
Trim Points
Gold Plated Pads
V15X5Z
Gold Plated Pads
FIGURE 2 - POWER DERATING CURVE
Discrete chips suitable for working temperatures of up to
+ 200 °C are available on request.
- 55 °C
100
+ 70 °C
Rated Power (%)
75
50
25
0
- 75
- 50
- 25
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
The typical pattern and trimming illustrations show that the
V5X5Z resistor has 16 trimming points, and the V15X5Z has
20. These trimming points are arranged around the chip
periphery and are clearly indicated. Trimming to the desired
resistance value and tolerance is accomplished by cutting
the trim points, thereby producing specific incremental
changes in the chip’s resistance value relative to the original
prevalue; up to + 20 % for the V5X5Z, + 30 % for the
V15X5Z (not all trim points need be used; the
ΔR
necessary
to adjust the pre-value to the desired final value dictates
which trim points need to be used).
Monitoring of circuit output while “actively” trimming readily
permits adjustment of the chip to ± 0.005 %.
Actual trimming charts are supplied on request for all
images.
Vishay precision chip resistors offer an order of magnitude
of improvement over other chip resistors in hybrid
applications. With a maximum Temperature Coefficient of
Resistance (TCR) of ± 2 ppm/°C, selected TCR tracking to
0.5 ppm/°C and factory supplied resistance tolerances to
± 0.01 %, they provide the user with accuracy and stability
not available in other chip resistor products. If desired they
can be user trimmed to any value within ± 0.005 %, where
the value remains stable after trimming. Load life stability is
0.05 %
ΔR
maximum under full rated power for 2000 h at
+ 70 °C.
Document Number: 63189
Revision: 13-Jan-11
The Vishay precision trimming system allows for adjustment
to precise resistance values without concern over
mechanical override and control problems encountered in
laser or air abrade trimming of solid geometry resistance
patterns. This ability to trim resistor chips to tolerance levels
never before available to hybrid manufacturers, now gives a
project manager the ability to increase the value-added level
of their hybrid services. More of the profit thus available can
be retained within the facility. Now, instead of buying
precision resistors in separate packages or modules (which
require additional PC board real estate) and integrating them
into a system, the project manager can utilize Vishay
precision resistor chips or matched sets to manufacture the
entire hybrid circuit in-house. Eliminates the need to “pin-out”
for precision resistor requirements because the precision
resistors are inside - part of the hybrid microcircuit design.
Vishay precision chip resistors are available either factory-
trimmed to exact resistance values (option T) or ready for
user trimming (option U); user trimming can be done either
before or after bonding - using standard epoxies - onto the
hybrid circuit substrate using standard laser, air abrade, or
manual adjustment techniques. However care should be
taken that no carbonization occurs when laser trimming.
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
1
V5X5Z, V15X5Z (Z-Foil)
Vishay Foil Resistors
TABLE 2 - PRECISION CHIP RESISTOR SPECIFICATIONS
Resistance range
TCR
(- 55 °C to + 125 °C, + 25 °C Ref. (ppm/°C)
50
Ω
to 5 kΩ (model V5X5Z)
50
Ω
to 30 kΩ (model V15X5Z)
See Table 1
0 to 1.2 x nominal prevalue (V5X5Z)*
0 to 1.3 x nominal prevalue (V15X5Z)
Note
* The V5X5Z chips are being gradually redesigned for a higher trimming factor -
1.3 or more instead of 1.2. For information about the availability of a specific
resistance value, contact the factory.
Option T (trimmed to value at Vishay)*
± 0.01 %; ± 0.02 %; ± 0.05 %; ± 0.1 %; ± 0.25 %; ± 0.5 %; ± 1 %; ± 5 %
Option U (for user trimming to any value within ± 0.005 %)
G.F. = Good for values
Note
* See table 1 for resistance/tolerance limits
V5X5Z: 0.05 W (15 V maximum)
V15X5Z: 0.1 W (50 V maximum)
1 ns without ringing
0.1 µH maximum; 0.08 µH typical
1.0 pF maximum; 0.5 pF typical
< 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
< 0.1 ppm/V
15 V (model V5X5Z)
50 V (model V15X5Z)
Gold: 50 µ" to 100 µ" thick
Trimming range
(Approximate adjustment capability)
Resistance tolerance
Power rating
(at + 70 °C ambient temperature), (see figure 4)
High frequency operation
Rise time
Inductance
Capacitance
Current noise
Voltage coefficient
Working voltage
Termination pads
TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON
TYPICAL VISHAY
Test group I
Thermal shock
Test group II
Low temperature operation
Short time overload
High temperature exposure
Resistance to bonding exposure
Test group III
Moisture resistance
Test group IV (Load Life Stability)
2000 h at + 70 °C
10 000 h at + 70 °C
Notes
(1)
MAXIMUM
± 0.04 %
± 0.01 %
± 0.04 %
± 0.05 %
± 0.05 %
± 0.1 %
± 0.015 %
± 0.05 %
± 0.02 %
± 0.005 %
± 0.02 %
± 0.02 %
± 0.02 %
± 0.03 %
± 0.005 %
± 0.01 %
TCR tracking is a measure of the similarity of resistance value change in two or more resistors which are undergoing the same
temperature changes. Tracking could be expressed as the difference in the temperature coefficients of the resistors, expressed in ppm/°C
as (ΔR
1
/R
1
-
ΔR
2
/R
2
) x 10
-6
/ΔT °C.
Selected TCR tracking is available for specially ordered lots of resistors. The selected TCR tracking can be 3, 2, 1 and as close as 0.5 ppm/°C
throughout the full temperature range. Should close TCR tracking be required for differing resistance values, contact the factory.
(2)
Document Number: 63189
Revision: 13-Jan-11
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
3
V5X5Z, V15X5Z (Z-Foil)
Vishay Foil Resistors
To acquire a precision resistance value, the Bulk Metal Foil chip is
trimmed by selectively removing built-in “shorting bars.” To increase
the resistance in known increments, marked areas are cut,
producing progressively smaller increases in resistance. This
method reduces the effect of “hot spot” and improves the long term
stability of the hybrid chips.
FIGURE 5 - TRIMMING TO VALUES
(conceptual illustration)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Mutual Inductance
Reduction due
to Change in
Current Direction
Note:
Foil shown in black, etched spaces in white
TABLE 4 - GLOBAL PART NUMBER INFORMATION
(trimmed option)
(1)(2)
NEW GLOBAL PART NUMBER: Y4033249R000Q0W (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
CHARACTERISTICS
0
= standard
1 to 999
= custom
Y
4
0
3
3
2
4
9
R
0
0
0
Q
0
W
PRODUCT CODE
Trimmed
(2)
:
4033
= V5X5ZT
4034
= V15X5ZT
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
J
= ± 5.0 %
PACKAGING
W
= waffle pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y4033 249R000 Q 0 W:
TYPE: V5X5Z trimmed
VALUE: 249.0
Ω
ABSOLUTE TOLERANCE: ± 0.02 %
PACKAGING: waffle pack
HISTORICAL PART NUMBER: V5X5ZT 249R00 Q W (will continue to be used)
V5X5ZT
MODEL
V5X5ZT
V15X5ZT
249R00
OHMIC VALUE
249R00
= 249.0
Ω
Q
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
J
= ± 5.0 %
W
PACKAGING
W
= waffle pack
Notes
(1)
(2)
For non-standard requests, please contact application engineering.
VISHAY to supply chips trimmed to the purchaser’s exact resistance and tolerance specifications, ready for insertion into a hybrid microcircuit
with no further processing other than bonding and termination. Specify exact resistance value(s) and tolerance(s).
For any questions, contact:
foil@vishaypg.com
Document Number: 63189
Revision: 13-Jan-11
www.vishayfoilresistors.com
4
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