MALVERN, Pa.--(BUSINESS WIRE)--
Vishay Precision Group, Inc. (NYSE: VPG) today announced that its Vishay
Foil Resistors brand (VFR) has released a new ultra-high-precision
Z-Foil surface-mount current sensing chip resistor that is the
industry’s first such device to combine a high power rating of 1 W at
+70°C and low TCR of ±0.2 ppm/°C typical from -55°C to +125°C, +25°C
ref. By dissipating up to 1 W in the 1625 package size, the VCS1625ZP
allows designers to use a single device to measure larger currents than
previously possible. For high-power applications, the device offers
tight tolerances to ±0.2% (0.1% and 0.05% are available) and a
four-terminal Kelvin configuration for increased accuracy.
The VCS1625ZP features a power coefficient (ΔR due to self-heating) of 5
ppm at rated power, a thermal stabilization time of <1 ns (nominal value
achieved within 10 ppm of steady state value), and a wide resistance
range from 0.3 Ω to 10 Ω. Any resistance value within this range is
available at any tolerance with no additional cost or lead time effect.
The resistor offers a rise time of 1.0 ns with effectively no ringing,
short time overload of <0.005% (50 ppm), current noise of 0.010 µVrms/V
of applied voltage (<-40 dB), and a voltage coefficient of <0.1 ppm/V.
Offering the utmost in electrostatic discharge (ESD) immunity, the
device withstands ESD to at least 25 kV, for increased reliability, and
offers a non-inductive (<0.08 μH), non-capacitive design. The Bulk Metal®
Foil technology of the VCS1625ZP provides a significant reduction of the
resistive component’s sensitivity to ambient temperature variation (TCR)
and to the self-heating effect caused by changing loads. This allows
designers to guarantee a high degree of stability and accuracy in
fixed-resistor applications. In addition, the resistor’s design results
in a very low thermal EMF of 0.05 μV/°C typical, which is critical in
precision applications.
The VCS1625ZP’s load-life stability of 0.015% at +70°C for 2000 hours at
rated power is an order of magnitude better than typical current sensing
resistors. The device’s improved stability makes it ideal for
tightened-stability reference voltage and precision current sensing
applications in forced-balance electronic scales, measurement
instrumentation, bridge networks, motor controllers, and medical and
test equipment. In addition, the resistor can be tested in accordance
with EEE-INST-002 (MIL-PRF 55342) for military and space applications.
The all-welded construction of the VCS1625ZP is composed of a Bulk Metal
Foil resistive element with plated copper terminations. The flat
terminations make intimate contact with the resistive layer along the
entire side of the resistive element, thereby minimizing temperature
variations. In addition to the low thermal EMF compatibility of the
device’s metals, the uniformity and thermal efficiency of the design
minimize the temperature differential across the resistor, thereby
assuring low thermal EMF generation at the terminations. This further
reduces the thermal EMF voltage, or “battery effect,” exhibited by most
current sensing or voltage reference resistors.
The device released today is characterized by extremely low excess noise
when compared with other resistor technologies. Additionally, the
current in adjacent current carrying paths runs in opposing directions,
cancelling the parasitic inductance of these paths. Also, path-to-path
capacitances are connected in series, which has the effect of minimizing
the parasitic capacitance of the resistor. The
low-inductance/capacitance device is characterized by non-measurable
peak-to-peak signal distortions.
The VCS1625ZP is available with tin/lead or lead (Pb)-free gold or tin
termination options, and with additional post-manufacturing operations
(PMO) to extend the operating temperature from +150°C to well above
+200°C.
Samples and production quantities of the VCS1625ZP are available now,
with lead times of five working days for samples and eight weeks for
standard orders.
Further information about the VCS1625ZP and other Vishay Foil Resistors
products is available at www.vishayfoilresistors.com.
Follow Vishay Foil Resistors at http://twitter.com/foilresistor.
About Vishay Precision Group
Vishay Precision Group (VPG) is an internationally recognized designer,
manufacturer and marketer of: components based on its resistive foil
technology; sensors; and sensor-based systems specializing in the
growing markets of stress, force, weight, pressure, and current
measurements. VPG is a market leader of Foil Technology Products,
providing ongoing technology innovations in precision foil resistors and
foil strain gages, which are the foundation of the Company’s Force
Sensors Products and its Weighing and Control Systems. The product
portfolio consists of a variety of well-established brand names
recognized for precision and quality in the marketplace. To learn more,
visit VPG at www.vishaypg.com.
About VPG Foil Resistors
VPG Foil Resistors, a part of Vishay Precision Group (VPG), produces the
most precise and stable resistors available. Distinguished by the
premier brands Vishay Foil Resistors, Powertron, and Alpha Electronics,
the VPG Foil Resistors portfolio includes discrete resistors and
resistor networks in surface mount and through-hole (fixed-lead)
configurations; customized chip resistor networks; precision trimming
potentiometers; and discrete chips for use in hybrid circuits. These
devices are used in applications requiring a high degree of precision
and stability, such as in medical testing equipment, semiconductor
equipment, precision measuring instruments, aerospace, and military
applications. To learn more, visit www.vishayfoilresistors.com.
Bulk Metal is a registered trademark of Vishay Precision Group.
Link to detailed product info: http://www.vishaypg.com/ppg?63155
Link to product photo: http://www.flickr.com/photos/[email protected]/8615161436
Vishay Precision Group
Marti Spalding, +1 919-374-5515
Director,
Global MarCom
[email protected]
Source: Vishay Precision Group, Inc.