VCS1625Z Datasheet, PDF (1/4 Pages) Vishay Siliconix – Ultra High Precision Z-Foil Surface Mount Current Sensing Chip Resistors with TCR of ± 0.05 ppm/°C and Power Coefficient of 5 ppm at Rated Power

VCS1625Z (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Surface Mount Current
Sensing Chip Resistors with TCR of ± 0.05 ppm/°C and
Power Coefficient of 5 ppm at Rated Power
FEATURES
Any value at any tolerance available within resistance range
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 fixed-resistor applications using solutions
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^® Z-foil as the resistance element, it provides
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.
• 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.) (see table 1)
T ^{• Tolerance: to ± 0.2 %}
• Power coefficient “ΔR due to self heating”:
Pb-free
Available
RoHS*
COMPLIANT
5 ppm at rated power
• Load life stability: 0.02 % at 70 °C, 2000 h at rated power
C _{• Electrostatic discharge (ESD) above 25 000 V}
• Short time overload < 0.005 %
• Ohmic values: 0.3 Ω to 10 Ω
U (for higher or lower values please contact us)
• Power rating: 1 W at + 70 °C (Figure 1)
• Non inductive, non capacitive design
D ^{• Rise time: 1 ns without ringing}
• Current rating: 5 A maximum
• Current noise: < - 40 dB
• Voltage coefficient: < 0.1 ppm/V
O _{• Non inductive: < 0.08 µH}
• Non hot spot design
• Any value available within resistance range (e.g. 1R234)
R • Prototype samples available from 48 h. For more
information, please contact [e-mail]
P^{• For better performances please contact us}
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
D _{FIGURE 1 - POWER DERATING CURVE}
E _{- 55 °C}
100
+ 70 °C
75
V ₅₀
25
O ₀
- 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175
R^{Ambient Temperature (°C)}
TERMINATIONS
• Two lead (Pb)-free options are available:
gold plated or tin plated
• Tin/lead plated
APPLICATIONS
• Military
• Medical
R
I
I
• Automatic test equipment (ATE)
• Airborne (in heads-up display
systems)
I₁
E₁
E₂
I₂
V
• High precision instrumentation
• Electron beam recording equipment
• Electron microscopes
• Current sensing applications
• Forced balance electronic scales
• Applications that require superior frequency stability
P ^{TABLE 1 - SPECIFICATIONS}
MODEL
NUMBER
RESISTANCE
RANGE
RESISTANCE
TOLERANCE
IM^VCS1625Z
> 2.0 Ω to 10 Ω ± 0.2 %, ± 0.5 %; ± 1.0 %
POWER RATING
at + 70 °C
1W
on alumina substrate
TYPICAL TCR and
MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C)
± 0.2 ± 2.8 ppm/°C
MAXIMUM
CURRENT
5A
0.3 Ω to 2.0 Ω
± 0.5 %; ± 1.0 %
(0.5 W on FR4 PCB)
Note
• Tighter performances are available. Please contact application engineering [e-mail]
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63094
Revision: 25-Feb-08
For any questions, contact: [e-mail]
www.vishay.com
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