Low - Voltage / Wide Band Si Hyperabrupt Varactors
MA4ST300
M/A-COM Division of AMP Incorporated
3
North America: Tel. (800) 366-2266, Fax (800) 618-8883
3
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V4.00
Features
Surface Mount Packages
(SOT-23, SOT-323, SOD-323)
High Capacitance Ratio at Low Voltages
High Q at Low Voltages
SPC Process for Superior C-V Repeatability
Available as Single and Common Cathode Pairs
Tape and Reel Packaging
Designed for Commercial Wireless Applications
Description
The MA4ST300 series are ion-implanted, hyperabrupt junction,
silicon tuning varactors in SOT-23, SOT-323, and SOD-323
surface mount packages. This series of varactors is designed for
high capacitance ratio and low voltage operation. Each varactor
type has a better than 3:1 capacitance ratio between 0.5V and
3.0V.
Applications
The MA4ST300 series tuning varactors are useful for wide band
tuning and low phase noise applications where the supply voltage
is limited to 5 volts or less. These varactors have been specifi-
cally designed to cover wireless application bands up to the 2.4
GHz WLAN band. Applications include VCOs and voltage tuned
filters.
Low - Voltage / Wide Band
Si Hyperabrupt Varactors
MA4ST300 Series
0.25
0.5
0.75
1.0
2.0
3.0
350
FREQUENCY (GHz)
-&7
107
$036
7$&6
107
,6
*60
3'&
&7
$FWLYH3DJHUV
'(&7
3+3
'&6
:/$1
*36
3&6
605
340
330
320
Fig. 1 Typical Device Selection by Frequency
Part No.
CJ0 (pF)
VJ (V)
M
MA4ST320
77.4
11.71
6.51
MA4ST330
33.9
8.91
5.15
MA4ST340
25.3
14.25
7.41
MA4ST350
15.7
14.55
7.26
Configurations
TOP VIEW (SOT-23, SOT-323)
Pair
Single
TOP VIEW (SOD-323)
Ls
Cp
Cj
Rs
Package
Parasitics
Parasitics:
Cp= 0.15 pF
Ls= 1.4 nH
Intrinsic Diode
Model:
N = 1.1
CJ0=(see table below)
VJ = (see table below)
FC = 0.5
BV = 12.0 V
M = (see table below)
Spice Model
Low - Voltage / Wide Band Si Hyperabrupt Varactors
MA4ST300
M/A-COM Division of AMP Incorporated
3
North America: Tel. (800) 366-2266, Fax (800) 618-8883
3
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V4.00
1 0 0
3 0 0
5 0 0
7 0 0
9 0 0
0
1
2
3
4
5
6
R e v e r s e V o l t a g e ( V )
TCC(PPM/C)
1 0 0
1 0 0 0
0 . 1
1
1 0
R e v e r s e V o lt a g e ( V )
Nominal Q
M A 4 S T 3 2 0
M A 4 S T 3 4 0
M A 4 S T 3 5 0
M A 4 S T 3 3 0
1
1 0
1 0 0
0 . 1
1
1 0
R e v e r s e V o l t a g e ( V )
Total Capacitance (pF)
M A 4 S T 3 2 0
M A 4 S T 3 3 0
M A 4 S T 3 5 0
M A 4 S T 3 4 0
Absolute Maximum Rating
1
Parameter
Ratings
Device Current
100 Ma
Power Dissipation
2, 3
650 mW
RF Input Power
+13 dBm
Junction Temperature
200C
Storage Temperature
-65C to +200C
Thermal Resistance:
jc
=140C/W
Typical Performance Curves
Total Capacitance vs Reverse Voltage at 1 MHz
Nominal Change in Capacitance with Temperature
Nominal Q at 50 MHz vs Reverse Voltage
Electrical Specifications @ T
A
= +25C
Breakdown Voltage @ I
R
= 10
A, V
b
= 12 V Minimum
Reverse Leakage Current @ V
R
= 10, I
R
= 100 nA Maximum
Part No.
C
T
C
T
Capacitance Ratio
Q Factor
(pF)
(pF)
f=1 MHz, V
R
=0.5V
f=1 MHz, V
R
=3.0V
C
T0.5
/C
T3.0
f=50 MHz, V
R
= 2.0V
Min.
Nom.
Max.
Max.
Typ.
Min.
MA4ST320
48.0
58.0
63.0
19.0
3.2
300
MA4ST330
22.0
26.0
30.0
9.0
3.2
350
MA4ST340
15.0
18.5
21.0
6.5
3.2
350
MA4ST350
9.5
11.8
13.5
4.5
3.2
400
Ordering Information
These varactors are available in the three case styles shown.
When ordering, specify the desired case style by adding the case
designation (287 for SOT-23, 1146 for SOT-323, 1141 for
SOD-323) as a suffix to the model number. For example,
MA4ST330-1141 specifies the MA4ST330 varactor in the
SOD-323 package. The MA4ST320 is available in the SOT-23
and SOD-323 packages only. The model number indicated is
for a single varactor. The MA4ST330, 340 and 350 are avail-
able in common cathode pairs in the SOT-23 package, and are
specified by adding "CK" to the end of the model number. For
example MA4ST330CK-287 specifies the MA4ST330 varactor
in common cathode pairs.
Low - Voltage / Wide Band Si Hyperabrupt Varactors
MA4ST300
M/A-COM Division of AMP Incorporated
3
North America: Tel. (800) 366-2266, Fax (800) 618-8883
3
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V4.00
Case Styles
SOT-23 (Case Style 287)
F
D
H
J
A
G
L
C
E
B
K
N
M
INCHES
MILLIMETERS
DIM.
MIN.
MAX.
MIN.
MAX.
A
0.048
1.22
B
0.008
0.20
C
0.040
1.00
D
0.013
0.020
0.35
0.50
E
0.003
0.006
0.08
0.15
F
0.110
0.119
2.80
3.00
G
0.047
0.056
1.20
1.40
H
0.037 typical
0.95 typical
J
0.075 typical
1.90 typical
K
0.103
2.60
L
0.024
0.60
SOT-23 (Case Style 287)
DIM.
GRADIENT
NOTE:
M
10
max.
1
1. Applicable on all sides
N
2
. . . 30
SOT-323 (Case Style 1146)
A
E
D
J
H
G
F
1 0
M A X .
C
B
INCHES
MILLIMETERS
DIM.
MIN.
MAX.
MIN.
MAX.
A
0.063
0.087
1.6
2.2
B
0.045
0.053
1.15
1.35
C
0.079
0.087
2.0
2.2
D
0.047
0.055
1.2
1.4
E
0.008
0.016
0.2
0.4
F
0.031
0.039
0.8
1.0
G
0.004
0.1
H
0.003
0.006
0.08
0.15
J
0.004
0.010
0.1
0.25
SOT-323 (Case Style 1146)
SOT-323 (Case Style 1146)
F
D
H
G
C
E
A
B
INCHES
MILLIMETERS
DIM.
MIN.
MAX.
MIN.
MAX.
A
0.043
1.1
B
0.004
0.1
C
0.008
0.2
D
0.010
0.016
0.25
0.4
E
0.003
0.006
0.08
0.15
F
0.063
0.075
1.6
1.9
G
0.045
0.057
1.15
1.45
H
0.091
0.106
2.3
2.7
SOT-323 (Case Style 1146)
Low - Voltage / Wide Band Si Hyperabrupt Varactors
MA4ST300
M/A-COM Division of AMP Incorporated
3
North America: Tel. (800) 366-2266, Fax (800) 618-8883
3
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V4.00
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