B3769 EPCOS AG, B3769 Datasheet - Page 3

• Manufacturer Part Number: B3769
• Description: Front-end Filters Narrow-band
• Manufacturer: EPCOS AG

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
Filter bandwidth
Relative attenuation (relative to
Impedance for pass band matching
1)
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.
SAW Components
Low-loss Filter
Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to
including loss in matching elements
excluding loss in matching elements
Input:
Output: Z
1000,00 ...2500,00 MHz
314,70 ... 315,00 MHz
314,67 ... 315,03 MHz
314,63 ... 315,07 MHz
294,35 ... 304,35 MHz
304,35 ... 312,65 MHz
312,65 ... 313,05 MHz
313,05 ... 314,15 MHz
315,55 ... 322,85 MHz
322,85 ... 335,00 MHz
335,00 ... 600,00 MHz
600,00 ...1000,00 MHz
min
Z
10,00 ... 294,35 MHz
IN
OUT
)
= R
= R
min
IN
OUT
1)
)
|| C
|| C
rel
IN
OUT
T
Z
Z
dB
A
S
L
3
= –45 ... +95˚C
= 50
= 50
f
C
min
rel
Nov 17, 2004
and matching network
and matching network
min.
0,54
48
45
25
33
13
13
38
43
60
40
—
—
—
—
—
—
—
—
350 || 2,7
350 || 2,7
314,85
0,59
typ.
1,9
1,3
0,5
0,7
1,0
53
50
30
40
18
17
45
48
70
45
max.
0,64
2,9
2,3
2,0
3,0
6,0
—
—
—
—
—
—
—
—
—
—
—
—
—
314,85 MHz
B3769
MHz
dB
dB
dB
dB
dB
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
|| pF
|| pF