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SAW Components
Data Sheet B3655
SAW Components B3655
248,6 MHzLow-Loss Filter
Data Sheet
Ceramic package DCC18
Features
● Low-loss IF filter for DCS base station
● Rx path
● Temperature stable
● Unbalanced or balanced operation
● Ceramic SMD package
Terminals
● Gold plated
Dim. in mm, aprox. weight 0,7 g
Pin configuration
1 Input
6 Output
10 Input ground
5 Output ground
3, 8 Ground
2, 4, 7, 9 Case – ground
Type Ordering code Marking and Package
according to
Packing
according to
B3655 B39241-B3655-U210 C61157-A7-A54 F61074-V8069-Z000
Electrostatic Sensitive Device (ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
T
stg
V
DC
P
s
– 25/+ 75 ˚C
– 40/+ 85 ˚C
0V
10 dBm
2 Apr 04, 2001
SAW Components B3655
248,6 MHzLow-Loss Filter
Data Sheet
Characteristics
Operating temperature:
Terminating source impedance:
Terminating load impedance:
T
= -5 - 75 ˚C
A
Z
= 50 Ω and matching network
S
Z
= 50 Ω and matching network
L
min. typ. max.
Nominal frequency
f
N
— 248,6 — MHz
Minimum insertion attenuation α
(including matching network)
Amplitude ripple (p-p) ∆α
fN± 95 kHz — 0,4 1,0 dB
fN± 120 kHz — 0,6 1,5 dB
Passband width α
Absolute group delay (at
f
) τ — 2,3 3,0 µs
N
≤ 3,0 dB
rel
B
Group delay ripple (p-p) ∆τ
fN± 95 kHz — 0,3 0,7 µs
fN± 120 kHz — 0,4 1,0 µs
Relative attenuation (relative to α
) α
min
fN± 0,33 MHz ... fN± 0,60 MHz 11 18,5 — dB
fN± 0,60 MHz ... fN± 0,80 MHz 22 26 — dB
fN± 0,80 MHz ... fN± 3,00 MHz 30 36 — dB
fN− 3,00 MHz ... fN− 105 MHz 48 51 — dB
fN− 105 MHz ... fN− 120 MHz 51 65 — dB
fN+ 3,00 MHz ... fN+ 13 MHz 48 51 — dB
fN+ 13 MHz ... fN+ 30 MHz 43 46 — dB
fN+ 30 MHz ... fN± 105 MHz 48 51 — dB
fN+ 105 MHz ... fN+ 120 MHz 51 56 — dB
min
3,0dB
rel
— 8,3 9,5 dB
240 410 — kHz
Temperature coefficient of frequency
Turnover temperature
1)
Temperature dependance of
f
:
f
(
c
c
1)
T
) =
A
TC
f
T
0
f
(
T
)(1 +
c
0
— – 0,036 — ppm/K
—30—˚C
TC
(
T
–
T
f
)2)
A
0
2
3 Apr 04, 2001
SAW Components B3655
248,6 MHzLow-Loss Filter
Data Sheet
Matching network
Cp1 = 22 pF
Ls2 = 22 nH
Ls3 = 22 nH
Cp4 = 22 pF
4 Apr 04, 2001
SAW Components B3655
248,6 MHzLow-Loss Filter
Data Sheet
Normalized frequency response
Normalized frequency response (pass band)
5 Apr 04, 2001
SAW Components B3655
A
T
T
t
t
248,6 MHzLow-Loss Filter
Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC IS
P.O. Box 80 17 09, D-81617 München
EPCOS AG 1999. All Rights Reserved.
s far as patents or other rights of third parties are concerned, liability is only assumed for components per se, not for applications, processes and circuits implemented within components or
assemblies.
he information describes the type of component and shall not be considered as assured
characteristics.
erms of delivery and rights to change design reserved.
For questions on technology, prices and delivery please contact the sales offices of EPCOS AG or
he international representatives.
Due to technicalrequirements components may contain dangerous substances. For informationon
he type in question please also contact one of our sales offices.
6 Apr 04, 2001
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