SAW Components
Data Sheet B3850
2
Jul 15, 2002
SAW Components
B3850
125,00 MHz
Low-Loss Filter
Data Sheet
top view
side view
bottom view
1,6
6,5
13,3
1,7
1,0
7,62
1
2
3
4
5
6
7
8
9
10
3,81
2,3
Ceramic package DCC12A
Features
s
Low-loss IF filter for GSM EDGE base station
s
Usable bandwidth 400 kHz
s
Very low group delay ripple
s
Temperature stable
s
Ceramic SMD package
Terminals
s
Gold plated
Dimensions in mm, approx. weight 0,4 g
Pin configuration
10
Input
1
Input ground
5
Output
6
Output ground
3, 8
Ground
2, 4, 7, 9
Case ground
Electrostatic Sensitive Device (ESD)
Type
Ordering code
Marking and Package
according to
Packing
according to
B3850
B39121-B3850-H510
C61157-A7-A94
F61074-V8131-Z000
Maximum ratings
Operable temperature range
T
40 / +85
C
Storage temperature range
T
stg
40 / +85
C
DC voltage
V
DC
1,2
V
Source power
P
s
10
dBm
3
Jul 15, 2002
SAW Components
B3850
125,00 MHz
Low-Loss Filter
Data Sheet
Characteristics
Operating temperature range:
T
= -10 .. 85 C
Terminating source impedance:
Z
S
= 50
and matching network
Terminating load impedance:
Z
L
= 50
and matching network
min.
typ.
max.
Nominal frequency
f
N
--
125,0
--
MHz
Minimum insertion attenuation
min
--
6,2
7,0
dB
Pass bandwidth
rel
1,0 dB
B
1dB
400
560
--
kHz
rel
3,0 dB
B
3dB
--
840
--
kHz
Amplitude ripple (peak to adjacent valley)
f
N
200 kHz
--
0,1
--
dB
Amplitude variation (p-p)
f
N
200 kHz
--
0,6
1,0
dB
Absolute group delay
@
f
N
0,7
1,1
1,7
s
Group delay ripple (p-p)
f
N
200 kHz
--
70
120
ns
Relative attenuation (relative to
min
)
rel
f
N
0,4 MHz
...
f
N
0,6 MHz
0
2
--
dB
f
N
0,6 MHz
...
f
N
1,2 MHz
8
10
--
dB
f
N
1,2 MHz
...
f
N
1,8 MHz
20
30
--
dB
f
N
1,8 MHz
...
f
N
3,4 MHz
25
40
--
dB
f
N
3,4 MHz
...
f
N
6,5 MHz
34
50
--
dB
f
N
6,5 MHz
...
f
N
9,5 MHz
40
50
--
dB
f
N
9,5 MHz
...
f
N
17,0 MHz
43
60
--
dB
10,0 MHz
...
f
N
-
17,0 MHz
55
60
--
dB
f
N
+
17,0 MHz
...
450,0 MHz
1)
55
60
--
dB
VSWR (Input and output in pass band)
--
2,0
2,3
4
Jul 15, 2002
SAW Components
B3850
125,00 MHz
Low-Loss Filter
Data Sheet
1)
Narrowband responses (typ. 40 dB) at 202 MHz, 228 MHz, 250 MHz, and at 375 MHz
2)
Temperature dependance of
f
c
:
f
c
(
T
A
) =
f
c
(
T
0
)(1 +
TC
f
(
T
A
T
0
)
2
)
Matching network to 50
(Element values depend upon PCB layout)
L
p1
= 33 nH
L
s3
= 56 nH
L
s2
= 68 nH
L
p4
= 27 nH
Temperature coefficient of frequency
2)
TC
f
--
0,036
--
ppm/K
2
Turnover temperature
T
0
--
50
--
C
min.
typ.
max.
5
Jul 15, 2002
SAW Components
B3850
125,00 MHz
Low-Loss Filter
Data Sheet
Normalized frequency response
Normalized frequency response (pass band)
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