Surface Mount Hyperabrupt Varactors
MA4ST300 Series
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.
Absolute Maximum Rating @ 25C
Features
Surface Mount Packages
High Quality Factor
Capacitance Ratio to 9.5:1
Tape and Reel Packaging Available
SPC Monitored Ion Implantation for Excellent
C-V Repeatability
Singles and Common Cathode Pairs
Description
M/A-COM's MA4ST400 series are ion-implanted, hyperabrupt
junction, silicon tuning varactors in the SOT-23 surface mount
package. These thermal oxide passivated diodes feature high
capacitance ratio and quality factor. They are well suited for
octave bandwidth tuning in the HF to UHF frequency bands. The
standard capacitance tolerance is 10%, with tighter tolerances
available. Capacitance matching at one or more bias voltages is
also available.
Applications
The MA4ST400 series tuning varactors are useful for octave
bandwidth tuning applications in the HF through UHF ranges.
Applications include VCOs and voltage tuned filters in radios,
cable TV tuners and test instruments where low cost and excellent
lot-to-lot repeatability are critical. Linear tuning performance is
available from 3 to 8 volts.
Ordering Information
The model number indicated is for a single varactor. When
ordering diodes in common cathode pairs add suffix "CK." For
example, MA4ST401CK specifies model number MA4ST401 in
common cathode pairs. To order parts on tape and reel add suffix
"T" to the end of the part number. i.e., MA4ST401CK-T.
SOT-233
Surface Mount
Hyperabrupt Varactors
MA4ST400 Series
TOP VIEW
Single
Double
Configurations
Parameter
Absolute Maximum
Reverse Voltage
22 Volts
Forward Current
50 mA
Total Power Dissipation
1
250 mW
Junction Operating Temp.
-55C to +125C
Storage Temperature
-55C to +125C
1. At 25C case temperature. Derate linearly to zero at 150C.
Surface Mount Hyperabrupt Varactors
MA4ST300 Series
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.
Electrical Specifications @ T
A
= +25C
Minimum Breakdown Voltage (V
B
) = 22 Volts at 10 A,
Maximum Reverse (I
R
) = 100 nA at 20 Volts
1
1 0
1 0 0
1
1 0
1 0 0
R E V E R S E V O L T A G E ( V o lt s )
TOTAL CAPACITANCE (pF)
M A 4 S T 4 0 9
M A 4 S T 4 0 7
M A 4 S T 4 0 5
M A 4 S T 4 0 3
M A 4 S T 4 0 1
Typical Performance Curves
NOMINAL CHANGE in CAPACITANCE with
TEMPERATURE
TOTAL CAPACITANCE (pF) vs REVERSE
VOLTAGE
1 5 0
2 0 0
2 5 0
3 0 0
3 5 0
4 0 0
0
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
R E V E R S E V O L T A G E ( V o lt s )
TCC (PPM/C)
Case Styles
SOT-23
Case Style 287
F
D
H
J
A
G
L
C
E
B
K
N
M
SOT-23 (Case Style 287)
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
DIM.
GRADIENT
M
10 max.
1
N
2 . . . 30
Note:
1. Applicable on all sides.
Model
Number
Total
Capacitance
C
T4
10%
Minimum
Capacitance
Ratio C
T2
/C
T20
Maximum
Q
MA4ST401
10 pF
6.0
250
MA4ST402
12 pF
6.5
250
MA4ST403
15 pF
7.0
250
MA4ST404
18 pF
7.0
175
MA4ST405
22 pF
7.5
175
MA4ST406
27 pF
8.0
150
MA4ST407
33 pF
9.0
150
MA4ST408
39 pF
9.5
150
MA4ST409
47 pF
9.5
150
Test
F = 1 MHz
F = 1 MHz
F = 50 MHz
Conditions
V
R
= 4 Volts
V
R
= 4 Volts
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