MA46580-MA46585_15 Datasheet, PDF (1/3 Pages) M/A-COM Technology Solutions, Inc. – Beam Lead Constant Gamma GaAs Tuning Varactor

MA46580 & MA46585
Beam Lead Constant Gamma GaAs Tuning Varactor
Rev. V4
Features
• Constant Gamma = 1.0 & 1.25 available
• High Q (3000 minimum at 4V 50MHz)
• Strong Beam Construction
(Minimum 10 gram beam strength)
• Low Parasitic Capacitance
• Close Capacitance tracking
• Lead-Free (RoHs Compliant) equivalents
available with 260°C reflow compatibility
Description
The MA46580 & MA46585 series beam lead con-
stant gamma tuning varactors are hyper-abrupt junc-
tion gallium arsenide diodes with a constant gamma
of 1.0 or 1.25. The high Q values and the elimination
of package parasitics make these varactors very
attractive for voltage controlled oscillators that re-
quire linear tuning. These tuning diodes are useful at
frequencies as high as 40 Ghz.
The beam lead design eliminates almost all of the
package parasitics resulting in improved linearity of
the junction capacitance change with applied re-
verse bias voltage. This improves tracking between
diodes and can improve VCO linearity.
Electrical Specifications @ T_A = +25 °C
Gamma = 1.0²
Gamma4 = 0.9 - 1.1, VR = 2 - 12 Volts
Breakdown Voltage @ I_R = 10µA, V_b = 18 V Min
Reverse Leakage Current @ V_R =14V, I_R = 50 nA Max
Case
Style
Part Number
Total
Capaci-
tance¹
+/-20%
Vr=4V
(pF)
MA46585-1209 1209
0.5
Total
Capaci-
tance
Ratio
Q
Mini-
mum
Vr=2V Vr=4V
Vr=12V f=50MHz
-
-
3.2-5.2 3000
Absolute Maximum Ratings @ T_A=+25 °C
(Unless Otherwise Noted) ¹
Parameter
Reverse Voltage
Operating Temperature
Absolute Maximum
18V
-65°C to +150°C
Storage Temperature
-65°C to +200°C
Power Dissipation
25mW at 25 °C
Beam Strength
10 grams minimum
1. Operation of this device above any one of these parameters
may cause permanent damage.
Applications
These beam lead constant gamma tuning varac-
tors are particularly useful in broadband VCO’s,
where linear frequency tuning is an important
feature. They are also very useful for FM modu-
lating a source for telecommunication transmitter
and in many cases such circuits can be designed
without a linearization circuit.
Electrical Specifications @ T_A = +25 °C
Gamma = 1.25²
Gamma4 = 1.13-1.38, VR = 2 - 12 Volts
Breakdown Voltage @ I_R = 10µA, V_b = 18 V Min
Reverse Leakage Current @ V_R =14V, I_R = 50 nA Max
Case
Style
Part Number
MA46580-1209 1209
Total
Capaci-
tance¹
+/-20%
Vr=4V
(pF)
0.5
Total
Capaci-
tance
Ratio
Q
Mini-
mum
Vr=2V Vr=4V
Vr=12V f=50MHz
-
-
4.5-6.5 3000
Notes:
1. Capacitance is measured at 1 MHz.
2. All junctions are hyperabrupt with nominal Γ= 1.0 or 1.25
3. Reverse voltage (VB) is measured at 10 microamps.
1
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