Hyperabrupt Junction Tuning Varactor
SMV1770-079
Features
s
Low Series Resistance
s
High Capacitance Ratio
s
Ultra Small Size SC-79 Package
s
Designed for High Volume, Low Cost
Battery Applications
s
Available in Tape and Reel Packaging
Description
The SMV1770-079 is a silicon hyperabrupt junction varactor
diode specifically designed for battery operation.The
specified high capacitance ratio and low R
S
of this varactor
make it appropriate for low noise VCOs used at frequencies
in wireless systems to beyond 2.5 GHz. Applications include
low noise and wideband UHF and VHF VCO for GSM, PCS,
CDMA and analog phones.
Absolute Maximum Ratings
Characteristic
Forward Current (I
F
)
Power Dissipation (P
D
)
Storage Temperature (T
ST
)
Operating Temperature (T
OP
)
Value
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Electrical Specifications at 25°C
Parameter
Reverse Current (I
R
)
Capacitance (C
T
)
Capacitance (C
T
)
Capacitance Ratio (C
TR
)
Series Resistance (R
S
)
Breakdown Voltage (V
BR
)
V
R
= 8 V
C
T
@ 0.5 V, V
R
= 0.5 V, F = 1 MHz
C
T
@ 2.5 V, V
R
= 2.5 V, F = 1 MHz
C
T
(0.5 V)/C
T
(2.5 V)
V
R
= 1 V, F = 470 MHz
I
R
= 10
µA
12.0
22.1
7.7
2.3
23.6
8.6
2.7
0.4
0.5
Ω
V
Condition
Min.
Typ.
Max.
20.0
25.1
9.8
Unit
nA
pF
pF
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 1/01A
1
ALPHA [ ALPHA INDUSTRIES ]
