Thin-Film, Center-Tapped Resistors Provide <0.1 pF
Shunt Capacitance, -20-dB Low-Noise Operation for High Performance
in Test and Measurement Systems
MALVERN, PENNSYLVANIA - April 25, 2003 - A new thin-film, center-tapped,
dual-value resistor that enables more flexible hybrid circuit
designs was announced today by Vishay Intertechnology, Inc. (NYSE:
VSH).
The CTQ resistor
chip, which measures just 0.030 in. by 0.030 in., provides low
shunt capacitance of <0.1 pF and low-noise operation for
high performance in hybrid circuits for test and measurement
systems.
The versatile new resistor chip from Vishay Electro-Films gives
the user three value choices ? total value, one-half value,
or one-quarter value ? depending on the wire-bond configuration,
while six bonding pads enhance layout flexibility.
Each CTQ chip
manufactured through Vishay's sophisticated thin-film manufacturing
process features a high-stability, self-passivating and moisture-resistant
tantalum nitride resistor element and a quartz substrate.
CTQ resistors
offer a wide resistance range of 10 W to 1 MW, and at lower
power levels can provide lower shunt capacitance than is available
in silicon-based resistors. Tight tolerance values down to 0.1%
are available, with TCR values from ±25 ppm/°C to
±100 ppm/°C. TCR tracking between resistor halves
is ±2 ppm/°C, and center tap ratio tolerance is available
to ±0.1%. The resistor features a typical noise figure
of ?35 dB in a 100OW to 250OkW range and just ?20 dB at values
<100 O or >251 kO. The new device provides a maximum operating
voltage of 200 V, a dielectric breakdown voltage of 400 V, and
a 60OmW DC power rating at +70°C.
Electrically tested and visually inspected to MIL-STD-883,
CTQ resistors
feature resistance to thermal shock and high-temperature exposure
and are specified for an operating temperature range of ?55°C
to +125°C. They are suitable for use with other Vishay products
including wire-bondable capacitor chips, inductor chips, user-trim
resistor chips, and other quartz parts such as QFM, QFN, and
QFX single-value resistor chips.
Samples of the CTQ
resistor chips are available now, with lead times of 14 weeks
for production quantities.
