Surface Mount Hyperabrupt Varactors
MA4ST400 Series
MA4ST300 Series
Surface Mount
Hyperabrupt Varactors
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
SOT-233
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.
Configurations
TOP VIEW
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.
Single
Double
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.
Absolute Maximum Rating @ 25°C
Parameter
Reverse Voltage
Forward Current
1
Total Power Dissipation
Junction Operating Temp.
Storage Temperature
Absolute Maximum
22 Volts
50 mA
250 mW
-55°C to +125°C
-55°C to +125°C
1. At 25°C case temperature. Derate linearly to zero at 150°C.
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.
Surface Mount Hyperabrupt Varactors
MA4ST300 Series
Typical Performance Curves
NOMINAL CHANGE in CAPACITANCE with
TEMPERATURE
400
350
TCC (PPM/C)
300
250
200
150
0
2
4
6
8
10
12
14
16
18
20
R E V E R S E V O L T A G E ( V o lt s )
TOTAL CAPACITANCE (pF) vs REVERSE
VOLTAGE
100
TOTAL CAPACITANCE (pF)
10
M A 4ST 409
M A 4ST 407
M A 4ST 405
M A 4ST 403
M A 4ST 401
1
1
10
R E V E R S E V O L T A G E (V o lts )
100
Electrical Specifications @ T
A
= +25°C
Minimum Breakdown Voltage (V
B
) = 22 Volts at 10 µA,
Maximum Reverse (I
R
) = 100 nA at 20 Volts
Total
Model
Number
MA4ST401
MA4ST402
MA4ST403
MA4ST404
MA4ST405
MA4ST406
MA4ST407
MA4ST408
MA4ST409
Test
Conditions
Capacitance
C
T4
±
10%
10 pF
12 pF
15 pF
18 pF
22 pF
27 pF
33 pF
39 pF
47 pF
F = 1 MHz
V
R
= 4 Volts
Minimum
Capacitance
Ratio C
T2
/C
T20
6.0
6.5
7.0
7.0
7.5
8.0
9.0
9.5
9.5
F = 1 MHz
Maximum
Q
250
250
250
175
175
150
150
150
150
F = 50 MHz
V
R
= 4 Volts
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
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.
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