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Vishay capacitors improve wireless comm performance

Posted: 30 Apr 2004 ?? ?Print Version ?Bookmark and Share

Keywords:rf capacitor? vishay intertechnology? hpc0201a? silicon capacitor?

Vishay Intertechnology Inc. has disclosed that its new family of silicon-based RF capacitors in the 0201 footprint will help designers reduce the size and improve the performance of wireless communications products.

Based on a proprietary Vishay semiconductor process, the HPC0201A enable higher-performance, higher-precision operation at high frequencies while delivering low parasitic inductance and tight tolerances.

The single-side contact configuration of the capacitor eliminates the "tombstoning" problem that plagues board assembly when using conventional capacitors with wraparound terminations. The smooth, flat silicon surface of the HPC0201A simplifies the pick up step in pick-and-place operations, making board assembly faster and more efficient. However, the company stressed that the HPC0201A fits on exactly the same pads designed for conventional wraparound terminations.

Vishay said that compared with conventional RF capacitors, its HPC0201A offers extremely stable capacitance over a wide range of frequencies from 1MHz to several GHz. Available in 44 standard capacitance options ranging from 0.4pF to 39pF, with tight tolerances as low as 1 percent or 0.05pF, the capacitors are rated for 6-, 10-, 16-, and 25V operation. Devices with nonstandard capacitance values and with lead-free solder are also available upon request.

With a dimension of 0.61-by-0.30mm and 0.23mm height profile, the capacitor is suitable for various applications, including VCOs, filter networks, matching networks, and RF modules. It can also be used in medical applications.

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