Vishay has developed a new ultra-high-precision Z-Foil audio resistor that features a special design for increased clarity. The device provides a low typical TCR of ±0,2 ppm/°C from
-55°C to +125°C, +25°C reference, an excellent PCR (‘DR due to self heating’) of 5 ppm at rated power, an absolute tolerance of 0,01%, and current noise of less than -40 dB.
The Vishay audio resistor (VAR) provides a combination of low noise and low inductance/capacitance, making it suitable for applications requiring distortion-free properties. Its special ‘naked Z-foil resistor’ design, without moulding or encapsulation, adds an additional dimension for reducing signal distortion and increasing clarity in signal processing.
The new device is optimised for differential amplifiers, power supplies, and as a feedback, loading and gain resistor in high-precision amplifiers, high-end speaker systems and audio circuits, transducers and high-fidelity audio amplifiers.
The VAR has a load-life stability of ±0,01% for 2000 hours at +70°C, a low voltage coefficient of less than 0,1 ppm per volt, a thermal EMF of less than 0,05 μV/°C, and a resistance range of 10 Ω to 100 kΩ, with any value at any tolerance available through calibration. It offers a fast rise time of 1,0 ns without ringing and features a non-inductive (less than 0,08 μH), non-hot-spot design. The resistor offers high ESD immunity, withstanding electrostatic discharges exceeding 25 kV, for increased reliability. The resistor is available with lead-free or tin/lead alloy terminal finishes.
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