SAW Components
Data Sheet B3857
SAW Components
Low-Loss Filter
Data Sheet
B3857
919,5 MHz
Ceramic package DCC6C
Features
Low-loss RF filter for TETRA phone
Usable bandwidth 5 MHz
No matching required for operation at 50
Ω
Package for Surface Mounted Technology
(SMT)
q
Hermetically sealed ceramic package
q
q
q
q
Terminals
q
Gold-plated
typ. Dimensions in mm, approx. weight 0,037 g
Pin configuration
2
5
1, 3, 4, 6
Input
Output
To be grounded
Type
B3857
Ordering code
B39921-B3857-U410
Marking and Package
according to
C61157-A7-A67
Packing
according to
F61074-V8088-Z000
Electrostatic Sensitive Device
(ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power (cw)
T
A
T
stg
V
DC
P
s
-35 / +85
-40 / +85
0
6
˚C
˚C
V
dBm
source impedance 50
Ω
2
May 24, 2002
SAW Components
Low-Loss Filter
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B3857
919,5 MHz
T
A
= 25
±
10 ˚C
Z
S
= 50
Ω
Z
L
= 50
Ω
min.
Nominal frequency
Maximum insertion attenuation
917,0 MHz ... 922,0 MHz
Amplitude ripple
(p-p)
917,0 MHz ... 922,0 MHz
Group delay ripple
(p-p)
917,0 MHz ... 922,0 MHz
Return loss (Input and Output)
917,0 MHz ... 922,0 MHz
Absolute attenuation
0,1 MHz
...
932,0 MHz ...
937,0 MHz ...
942,0 MHz ...
947,0 MHz ...
2000,0 MHz ...
α
abs
895,0 MHz
937,0 MHz
942,0 MHz
947,0 MHz
2000,0 MHz
4000,0 MHz
12
10
14
18
26
15
typ.
919,5
max.
—
MHz
f
N
α
max
—
—
∆α
—
∆τ
—
1,7
2,8
dB
0,1
1,0
dB
10
30
ns
11,0
15,0
—
dB
40
13
23
28
29
28
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
Temperature coefficient of frequency
TC
f
—
– 36
—
ppm/K
3
May 24, 2002
SAW Components
Low-Loss Filter
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B3857
919,5 MHz
T
A
= -30 ... +75 ˚C
Z
S
= 50
Ω
Z
L
= 50
Ω
min.
Nominal frequency
Maximum insertion attenuation
917,0 MHz ... 922,0 MHz
Amplitude ripple
(p-p)
917,0 MHz ... 922,0 MHz
Group delay ripple
(p-p)
917,0 MHz ... 922,0 MHz
Return loss (Input and Output)
917,0 MHz ... 922,0 MHz
Absolute attenuation
0,1 MHz
...
932,0 MHz ...
937,0 MHz ...
942,0 MHz ...
947,0 MHz ...
2000,0 MHz ...
α
abs
895,0 MHz
937,0 MHz
942,0 MHz
947,0 MHz
2000,0 MHz
4000,0 MHz
10
8
12
15
26
15
typ.
919,5
max.
—
MHz
f
N
α
max
—
—
∆α
—
∆τ
—
1,9
3,4
dB
0,2
1,3
dB
15
30
ns
10,0
15,0
—
dB
35
10
21
27
29
28
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
Temperature coefficient of frequency
TC
f
—
– 36
—
ppm/K
4
May 24, 2002
SAW Components
Low-Loss Filter
Data Sheet
Transfer function
B3857
919,5 MHz
Transfer function (pass band, 25
±
10 ˚C)
5
May 24, 2002
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