B39431-B3555-U310 EPCOS [EPCOS], B39431-B3555-U310 Datasheet - Page 3

• Manufacturer Part Number: B39431-B3555-U310
• Description: SAW Components Low-loss Filter
• Manufacturer: EPCOS [EPCOS]

Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
Center frequency
(center frequency between 3 dB points)
Minimum insertion attenuation
Pass band (relative to
Relative attenuation (relative to
Impedance for pass band matching
Temperature coefficient of frequency
Frequency inversion point
1)
2)
source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped-
ance into the input matching / output matching network is calculated.
The conjugate complex value of these characteristic impedances are the input and output imped-
ances for flat passband. For more details, we refer to EPCOS application note #4.
Temperature dependence of f
SAW Components
Low-loss Filter
Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to
Input:
Output: Z
433,80 ... 434,12 MHz
400,00 ... 429,10 MHz
429,10 ... 430,70 MHz
430,70 ... 432,00 MHz
435,30 ... 436,80 MHz
436,80 ... 438,40 MHz
438,40 ... 450,00 MHz
450,00 ... 600,00 MHz
min
433,715 ... 434,205 MHz
433,675 ... 434,245 MHz
433,615 ... 434,305 MHz
Z
10,00 ... 400,00 MHz
IN
OUT
)
= R
= R
C
: f
C
min
IN
OUT
( T
2)
)
A
|| C
|| C
) = f
1)
IN
OUT
C
( T
T
Z
Z
0
A
S
L
) (1 + TC
3
= 25 ˚C
= 50
= 50
f
TC
T
C
min
rel
0
May 09, 2001
f
f
( T
and matching network
and matching network
A
min.
– T
40
38
20
35
15
24
38
—
—
—
—
—
—
—
—
—
8
0
)
2
)
225 || 3,4
225 || 3,4
433,96
–0,03
typ.
2,2
1,0
1,0
2,0
50
45
30
45
25
13
32
48
25
max.
4,0
2,0
3,0
6,0
—
—
—
—
—
—
—
—
—
—
—
—
—
433,92 MHz
B3555
dB
ppm/K
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
C
|| pF
|| pF
2