MACOM MA46472-134

This series of tuning varactors are hyperabrupt junction GaAs diodes featuring constant gamma values of 1.0 (MA4645x, MA4646x series), 1.25 (MA4647x, MA4648x series), and 1.5 (MA4641x, MA4642x series). These diodes offer high Q values (up to 4000), enabling excellent tuning performance from VHF through Ka-band. Each device in the series exhibits a large variation in hyperabrupt junction capacitance as a function of bias voltage. Standard capacitance tolerance is ±10%, with tighter tolerances also available. Capacitance matching at one or more bias voltages is available as well. All diode types are offered in a variety of ceramic packages and chip form. The constant gamma values of 1.0, 1.25, and 1.5 provided by these diodes enable circuit designers to significantly improve circuit performance. Compared to conventional hyperabrupt tuning varactors, constant gamma tuning varactors achieve more linear voltage-controlled oscillator frequency tuning. These varactors are particularly suited for voltage-tuned filters, analog phase shifters, and modulator circuits.

• Constant gamma values = 1.0, 1.25, and 1.5
• High Q factor (up to 4000 at -4V)
• More linear frequency tuning
• High and near-constant modulation sensitivity
• Available in lead-free (RoHS compliant) equivalents compatible with 260°C reflow soldering

Industrial, Scientific, and Medical (ISM) Applications