GaAs Hyperabrupt Varactor Diode

Gamma = 1.0, 1.25, & 1.5

Rev. V7

MA46410 thru MA46480 Series

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Features

 Constant Gamma = 1.0, 1.25 & 1.5

 High Q (up to 4000 at -4 Volts)

 More Linear Frequency Tuning

 High and Nearly Constant Modulation Sensitivity

 Lead-Free (RoHS Compliant) equivalents

available with 260°C reflow compatibility

Description and Applications

The MA46450, MA46470 and MA46410 series of

tuning varactors are hyperabrupt junction Gallium

Arsenide diodes featuring constant gamma 1.0

(MA46450 series),1.25 (MA46470 series) & 1.5

(MA46410 series). These diodes offer high Q (up to

4000) permitting excellent tuning performance from

VHF through Ka band. Each part in this series

exhibits the large change in capacitance versus bias

voltage characteristic of hyperabrupt junctions. The

standard capacitance tolerance is ±10%, with tighter

tolerances available. Capacitance matching at one

or more bias voltages is also available. All diode

types are available in a wide selection of ceramic

packages and in chip form. The constant gamma

value of 1.0, 1.25 & 1.5 available with these diodes

enables the circuit designer to produce significant

improvements in circuit performance. Constant

gamma tuning varactors permit more linear VCO

frequency tuning than do conventional hyperabrupt

tuning varactors. These varactors are particularly

well suited for use in voltage tuned filters, analog

phase shifters, and modulator circuits.

1. Operation of this device above any one of these parameters

may cause permanent damage.The maximum storage and

operating temperature of the plastic ODS-1088 case style is

125°C.

Parameter

Absolute Maximum

Reverse Voltage

Breakdown Voltage

Operating Temperature

-65°C to +175°C

Storage Temperature

65°C to +200°C

Common Case Styles

ODS-30

ODS-134 Die

0.1

1

10

1

10

100

Gamma = 1.0

Gamma = 1.25

Gamma = 1.5

Typical Junction Capacitance vs. Tuning Voltage

Packaged Tuning Varactor Equivalent Circuit