Low-Voltage / High Q Si Hyperabrupt Varactors
MA4ST200 Series
MA4ST200 Series
Low-Voltage / High Q
Si Hyperabrupt Varactors
Features
•
•
•
•
•
•
•
Surface Mount Packages
(SOT-23, SOT-323, SOD-323)
High Q at Low Voltages
High Capacitance Ratio 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
Configurations
TOP VIEW (SOT-23, SOT-323)
Description
M/A-COM’s MA4ST200 series is a 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 Q and low voltage operation. Each varactor type has a Q
greater than 400 at -2 V.
Single
TOP VIEW (SOD-323)
Double
Applications
The MA4ST200 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 for use in the wireless communications up to the
2.4 GHz band. Applications include VCOs and voltage tuned
filters.
Spice Model
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)
Rs
TYPICAL DEVICE SELECTION by FREQUENCY
230
240
250
Cp
Package
Parasitics
Cj
Parasitics:
Cp= 0.15 pF
Ls= 0.10 nH
Ls
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&7
605
3'&
*60
,6
107
107
7$&6
$036
3&6
*36
'&6
3+3
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Part No.
MA4ST230
2.0
3.0
CJO (pF)
12.0
8.16
6.19
VJ (V)
4.085
4.930
4.774
M
2.228
2.520
2.458
-&7
0.25
0.5
0.75
1.0
FREQUENCY (GHz)
MA4ST250
MA4ST250
M/A-COM Division of AMP Incorporated
Q
North America: Tel. (800) 366-2266, Fax (800) 618-8883
Q
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q
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.
Low-Voltage / High Q Si Hyperabrupt Varactors
MA4ST200 Series
Electrical Specifications @ T
A
= +25°C
Breakdown Voltage @ I
R
= 10 µA, V
b
= 12 V Minimum
Reverse Leakage Current @ V
R
= 10 V, I
R
= 100 nA Maximum
C
T
(pF)
f = 1 MHz, V
R
= 2.0V
Min.
Nom.
Max.
4.5
3.0
2.3
5.0
3.5
2.7
6.0
4.2
3.5
C
T
(pF)
f = 1 MHz, V
R
= 4.0V
Max.
3.1
2.3
1.8
Capacitance Ratio
C
T-0.5
/C
T-4.0
Typ.
3.5
3.5
3.5
Q Factor
f = 50 MHz, V
R
= 2.0V
Min.
400
450
450
Part
Number
MA4ST230
MA4ST240
MA4ST250
Absolute Maximum Rating
Parameter
Reverse Voltage
Forward Current
Total Power Dissipation
Junction Operating Temp.
Storage Temperature
Absolute Maximum
12 Volts
50 mA
250 mW
-55°C to +125°C
-55°C to +125°C
Typical Performance Curves
TOTAL CAPACITANCE vs REVERSE VOLTAGE at 1 MHz
TOTAL CAPACITANCE (pF)
100
MA4ST230
10
NOMINAL Q at 50 MHz vs REVERSE VOLTAGE
1.00E+03
NOMINAL Q
MA4ST240
M A4ST250
M A4ST240
M A4ST230
1
MA4ST250
0.1
0.1
1
REVERSE VOLTAGE (V)
10
1.00E+02
1.00E-01
1.00E+00
REVERSE VOLTAGE (V)
1.00E+01
NOMINAL CHANGE in CAPACITANCE with
TEMPERATURE
700
600
TCC(PPM/°C)
500
400
300
200
0
2
4
REVERSE VOLTAGE (V)
6
8
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,
MA4ST230-1141 specifies the MA4ST230 varactor in the
SOD-323 package. The model number indicated is for a single
varactor. Common cathode pairs are available in SOT-23
package, and are specified by adding “CK” to the end of the
model number. For example MA4ST230CK-287 specifies the
MA4ST230 varactor in common cathode pairs.
M/A-COM Division of AMP Incorporated
Q
North America: Tel. (800) 366-2266, Fax (800) 618-8883
Q
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q
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.
Low-Voltage / High Q Si Hyperabrupt Varactors
MA4ST200 Series
Case Styles
SOT-23
Case Style 287
F
D
A
N
SOT-23 (Case Style 287)
DIM.
A
B
C
D
E
F
G
H
J
K
L
DIM.
M
N
INCHES
MIN.
MAX.
0.048
0.008
0.040
0.013
0.020
0.003
0.006
0.110
0.119
0.047
0.056
0.037 typical
0.075 typical
0.103
0.024
GRADIENT
1
10° max.
2° . . . 30°
MILLIMETERS
MIN.
MAX.
1.22
0.20
1.00
0.35
0.50
0.08
0.15
2.80
3.00
1.20
1.40
0.95 typical
1.90 typical
2.60
0.60
Note:
1. Applicable on all sides.
M
G
B
K
L
H
J
C
E
SOT-323
Case Style 1146
A
E
J
H
SOT-323 (Case Style 1146)
DIM.
A
B
C
D
E
F
G
H
J
INCHES
MIN.
MAX.
0.063
0.087
0.045
0.053
0.079
0.087
0.047
0.055
0.008
0.016
0.031
0.039
0.004
0.003
0.006
0.004
0.010
MILLIMETERS
MIN.
MAX.
1.6
2.2
1.15
1.35
2.0
2.2
1.2
1.4
0.2
0.4
0.8
1.0
0.1
0.08
0.15
0.1
0.25
10
°
M A X .
C
B
G
F
D
SOD-323
Case Style 1141
SOD-323 (Case Style 1141)
C
F
D
G
E
H
B
A
DIM.
A
B
C
D
E
F
G
H
INCHES
MIN.
MAX.
0.043
0.004
0.008
0.010
0.016
0.003
0.006
0.063
0.075
0.045
0.057
0.091
0.106
MILLIMETERS
MIN.
MAX.
1.1
0.1
0.2
0.25
0.4
0.08
0.15
1.6
1.9
1.15
1.45
2.3
2.7
M/A-COM Division of AMP Incorporated
Q
North America: Tel. (800) 366-2266, Fax (800) 618-8883
Q
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q
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.
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