DME2205 Series

DME, DMF, DMJ Series: Silicon Beam-Lead Schottky Mixer Diodes—Singles, Pairs and Quads Bondable and Packaged Chips


Skyworks beam-lead silicon Schottky barrier mixer diodes are designed for applications through 40 GHz. The beam-lead design reduces the problem of bonding to the very small area characteristic of the low capacitance junctions.

Beam-lead Schottky barrier mixer diodes are made by the deposition of a suitable barrier metal on an epitaxial silicon substrate to form the junction. The process and choice of materials result in low series resistance with a narrow spread of capacitance values for close impedance control.

A variety of forward voltages are available, ranging from low values for low, or starved, local oscillator drive levels to high values for high drive, low distortion mixer applications. Beam-lead diodes are available in a wide range of packages. Capacitance ranges and series resistances are comparable with the packaged devices that are available through K-band. Unpackaged diodes are well suited for use in microwave integrated circuits. The packaged devices are designed to be inserted as hybrid elements in strip, transmission line applications. Beam-lead Schottky barrier diodes are categorized by universal mixer applications in four frequency ranges: S, X, Ku and Ka bands. They may also be used as modulators and high-speed switches.

Beam-lead diodes are suited for balanced mixers, due to their low parasitics and uniformity. A typical VF vs. IF curve is shown in Figure 1. Typical noise figures vs. LO drive is shown in Figure 2 for single N-type, low drive diode types.

DME2205 Series includes DME2205-223 and DME2205-253.

Specifications

Frequency BandS
CJ 0 V, 1 MHz (pF)0.30-0.50
Max. RS IF = 5 mA (Ω)5
Min. VB @ 10 µA (V)3
VF @ 1 mA (mV)300-400
Drive LevelMed

Features

  • Low 1/f noise
  • Low intermodulation distortion
  • Epoxy and hermetically sealed packages
  • SPC controlled wafer fabrication

Product Documents

Applications

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