INTRODUCTION
The Z-foil technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
Designers can now guarantee a high degree of stability and
accuracy in
based on Vishay‘s revolutionary Z-foil technology.
Model VCS1625Z is a surface mount chip resistor designed
with 4 pads for Kelvin connection. Utilizing Vishay’s Bulk
Metal
performance capabilities far greater than other resistor
technologies can supply in a product of comparable size.
0.05 ppm/°C absolute TCR removes errors due to
temperature gradients.
This small device dissipates heat almost entirely through the
pads so surface mount users are encouraged to be generous
with the board’s pads and traces.
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
Notes
(1)
(2)
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63094
Revision: 23-Mar-10
FIGURE 1 - POWER DERATING CURVE
TABLE 1 - SPECIFICATIONS
MODEL
NUMBER
VCS1625Z
Whichever is lower
Tighter performances are available. Please contact application engineering
®
100
75
50
25
0
- 75
Z-foil as the resistance element, it provides
- 55 °C
Sensing Chip Resistor with TCR of ± 0.05 ppm/°C and
- 50
> 2.0 to 10
RESISTANCE
0.3 to 2.0
fixed-resistor applications using solutions
Ultra High Precision Z-Foil Surface Mount Current
- 25
RANGE
Ambient Temperature (°C)
Power Coefficient of 5 ppm at Rated Power
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175
± 0.2 %, ± 0.5 %; ± 1.0 %
+ 70 °C
± 0.5 %; ± 1.0 %
RESISTANCE
TOLERANCE
(2)
For any questions, contact:
TYPICAL TCR and MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C)
± 0.2 ± 2.8 ppm/°C
FEATURES
Temperature coefficient of resistance (TCR):
Resistance range: 0.3 to 10 (for higher or
Foil resistors are not restricted to standard values, we can
Tolerance: to ± 0.2 %
Power coefficient “R due to self heating”: 5 ppm at rated
Load life stability: 0.02 % at 70 °C, 2000 h at rated power
Electrostatic discharge (ESD) up to 25 000 V
Short time overload < 0.005 %
Power rating: 0.5 W at + 70 °C (figure 1)
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current rating: 5 A maximum
Current noise: < - 40 dB
Voltage coefficient: < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Prototype samples available from 72 h. For more
TERMINATIONS
Two lead (Pb)-free options are available:
APPLICATIONS
Medical
Automatic test equipment (ATE)
Airborne (in heads-up display
High precision instrumentation
Electron beam recording equipment
Electron microscopes
Current sensing applications
Forced balance electronic scales
Applications that require superior frequency stability
foil@vishaypg.com
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
lower values please contact us)
supply specific “as required” values at no extra cost or
delivery (e.g. 1.234 vs. 1 )
power
information, please contact
For better performances please contact us
gold plated or tin plated
Tin/lead plated
Military
systems)
foil@vishaypg.com
VCS1625Z (Z-Foil)
0.5 W on FR4 PCB
POWER RATING
Vishay Foil Resistors
at + 70 °C
foil@vishaypg.com
I
I
1
(1)
www.foilresistors.com
E
1
CURRENT
R
V
MAXIMUM
5 A
E
2
(1)
I
2
1
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