M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel.
+44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
1
Specifications Subject to Change Without Notice.
V3.00
GaAs Abrupt
Tuning Varactors
MA46600 Series
Features
q
Highest Q
q
Large Capacitance Variation with Voltage
q
Custom Tailored Designs Available on Request
Description
The MA46600 series of microwave tuning varactors is a
family of abrupt junction gallium arsenide devices featur-
ing Q factors in excess of 8000. This series is specifically
designed for broadband high Q tuning performance (up
to 8000 at -4 volts and 50 MHz) from L through Ka band.
Characteristics such as high reliability, low leakage and
close capacitance tracking between diodes are typical of
these devices. Standard capacitance matching is 10%,
but closer matching is available upon request. All diode
types are available in a wide selection of ceramic pack-
ages as well as in chip form.
Applications
The MA46600 series of tuning varactors can be used for
both broad and narrow band tuning through Ka-band.
Typical applications include solid state tuning of VCOs
using transistors or Gunns as well as voltage tunable
filters and amplifier circuits. The GaAs abrupt junction
tuning varactors offer the highest Q of any tuning varac-
tors and are utilized in high frequency applications where
Q is premium.
Case Styles
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel.
+44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
2
Specifications Subject to Change Without Notice.
V3.00
VOLTAGE (VOLTS)
C
TO
/C
TV
(RATIO)
C
TO
= 4.0pF
C
TO
= 2.0pF
C
TO
= 1.0pF
C
TO
= 0.5pF
1
2
3
4
6
8 10
20
30
UNPACKAGED CHIP
10
9
8
7
6
5
4
3
2
1
GaAs Abrupt Junction Tuning Varactors
MA46600 Series
Electrical Specifications at 25C
Notes:
1. Capacitance is measured at 1 MHz on a bridge which has been bal-
anced with shielded test holders connected in place but open circuited.
2. All GaAs tuning varactors are available in any case style shown in this
bulletin as well as in chip form. When ordering, specify the desired
case by adding the case designation as a suffix to the model number,
i.e., MA46601-30. For example, a MA46601-30 specifies a 30 volt tun-
ing diode in a case style 30 with a C
T14
between .36 and .44 pF and a
Q at -4 volts and 50 MHz
7500. The capacitance values and capaci-
tance ratios are for case style 30. Other case styles or chips will have
slightly different values.
3. All junctions are abrupt i.e., y = 0.50 .03.
4. Total capacitance ratios will vary with case choice due to differences in
case capacitance (Cp). Figure 1 shows the ratio for the 30 case style.
5. Case parasitics (C
p
and L
s
) are given for most case styles.
6. Breakdown voltage (V
B
) is specified at -10 A.
Typical Performance Curve
CAPACITANCE CHANGE RATIOS FOR GaAs
TUNING VARACTORS IN CASE STYLE 30
Reverse
6
Ratio
1,2
Model
Voltage
C
T4
1,2
Q @ -4 Volts
C
T0
/C
T
V
B
(pF)
Number
(Volts)
10% (pF)
(Typical)
(Typical)
MA46600
30
0.3
8000
1.9
MA46601
30
0.4
7500
2.1
MA46602
30
0.5
7000
2.5
MA46603
30
0.6
6500
2.8
MA46604
30
0.8
6000
3.2
MA46605
30
1.0
5700
3.4
MA46607
30
1.5
5000
3.8
MA46609
30
2.2
4000
4.0
Absolute Maximum Ratings at +25C
Parameter
Temperature:
Operating
-65C to + 175C
Storage
-65C to + 200C
Voltage
See Breakdown Voltage
Power Dissipation
Cj < 1.0 pF max. @ 50 mW
(derate linearly to zero at 200C)
Cj
1.0 pF min. @ 100 mW
Environmental Ratings
Method
Levels
Temperature, Storage
1031
See Maximum Ratings
Temperature, Cycling
1051
5 cycles, -65 to + 150 C
Shock
2016
500 g's
Vibration
2056
15 g's
Constant Acceleration 2006
20,000 g's
Moisture Resistance
1021
10 days
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel.
+44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
3
Specifications Subject to Change Without Notice.
V3.00
GaAs Abrupt Junction Tuning Varactors
MA46600 Series
Case Styles
(See appendix for complete dimensions)
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