345.00 MHz One-Port SAW Resonator
•
•
•
•
Ideal for 345.00 MHz Transmitters
Very Low Insertion Loss
Quartz Stability
Rugged, Hermetic, Low Profile TO-39 Package
SR345
Absolute Maximum Rating (Ta=25°C)
Parameter
CW RF Power Dissipation
DC Voltage
Operating Temperature Range
Storage Temperature Range
P
V
DC
Rating
0
±30
-10 ~ +60
-40 ~ +85
Unit
dBm
V
°C
°C
T
A
T
stg
Electronic Characteristics
Parameter
Frequency (25°C)
Insertion Loss
Quality Factor
Temperature Stability
Unloaded Q-Value
50Ω Loaded Q-Value
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
Nominal Frequency
Tolerance from 345.00 MHz
Sym
f
C
Minimum
NS
-
-
-
-
25
-
-
-
1.0
-
-
-
2.3
Typical
345.00
-
1.4
12,080
1,800
-
fc
-0.032
-
-
17.5
97.6184
2.1823
2.6
Maximum
NS
±
75
2.0
-
-
55
-
-
10
-
26.0
-
-
2.9
Unit
MHz
KHz
dB
-
-
°C
KHz
ppm/°C
2
∆
f
C
IL
Q
U
Q
L
T
O
f
O
FTC
|f
A
|
-
R
M
L
M
C
M
C
O
ppm/yr
MΩ
Ω
µH
fF
pF
DC Insulation Resistance Between any Two Pins
RF Equivalent RLC Model
Motional Resistance
Motional Inductance
Motional Capacitance
Pin 1 to Pin 2 Static Capacitance
NS = Not Specified
Notes:
1.
The center frequency,
f
C
, is measured at the minimum IL point with
the resonator in the 50Ω test system.
Unless noted otherwise, case temperature
T
C
= +25°C ± 2°C.
Frequency aging is the change in
f
C
with time and is specified at
+65°C or less. Aging may exceed the specification for prolonged
temperatures above +65°C. Typically, aging is greatest the first year
after manufacture, decreasing in subsequent years.
Turnover temperature,
T
0
, is the temperature of maximum (or
turnover) frequency,
f
0
. The nominal frequency at any case
temperature, T
C
, may be calculated from:
f
=
f
0
[1 -
FTC
(T
0
-
T
C
)
2
].
This equivalent RLC model approximates resonator performance
near the resonant frequency and is provided for reference only. The
capacitance
C
0
is the measured static (nonmotional) capacitance
between Pin1 and Pin2. The measurement includes case parasitic
capacitance.
6.
Derived mathematically from one or more of the following directly
measured parameters:
f
C
,
IL,
3 dB bandwidth,
f
C
versus
T
C
, and
C
0
.
The specifications of this device are based on the test circuit shown
above and subject to change or obsolescence without notice.
Typically, equipment utilizing this device requires emissions testing
and government approval, which is the responsibility of the
equipment manufacturer.
Our liability is only assumed for the Surface Acoustic Wave (SAW)
component(s) per se, not for applications, processes and circuits
implemented within components or assemblies.
For questions on technology, prices and delivery please contact our
sales offices or e-mail to sales@vanlong.com.
2.
3.
7.
8.
4.
9.
5.
10.
Phone: +86 10 6301 4184
©
2004 by Vanlong Technology Co., Ltd.
Fax: +86 10 6301 9167
Email: sales@vanlong.com
Web: http://www.vanlong.com
SR345
345.00 MHz One-Port SAW Resonator
Package Dimensions (TO-39)
Electrical Connections
Terminals
1
2
3
Connection
Input/ Output
Output/ Input
Case-Ground
Package Dimensions
Dimensions
A
B
C
D
E
F
G
Nom (mm)
Min
Max
9.10
9.50
3.20
3.60
2.80
3.20
Φ0.25
Φ0.65
4.98
5.18
2.54 Nominal
0.4
0.5
Marking
Equivalent LC Model and Test Circuit
SR345
345.00
Ink Marking
Color: Black or Blue
Ω
Ω
Typical Application Circuit
Low Power Transmitter Application
Local Oscillator Application
Typical Frequency Response
Temperature Characteristics
f
c
= f
o
, T
c
= T
o
(f - f
o
)/f
o
(ppm)
∆T=
T
c
–T
o
(°C)
The curve shown above accounts for
resonator contribution only and does not
include oscillator temperature
characteristics.
Phone: +86 10 6301 4184
©
2004 by Vanlong Technology Co., Ltd.
Fax: +86 10 6301 9167
Email: sales@vanlong.com
Web: http://www.vanlong.com
SR345
DSP 与 ARM 处理器
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