IF Filters for Narrowband Cellular Phones
Series/Type:
B4871
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39141B4871H310
Substitute Product
Date of Withdrawal
14.06.2006
Deadline Last
Orders
31.08.2006
Last Shipments
30.09.2006
For further information please contact your nearest EPCOS sales office, which will also support you in selecting a
suitable substitute. The addresses of our worldwide sales network are presented at www.epcos.com/sales.
SAW Components
Low Loss Filter for Mobile Communication
Data Sheet
Features
s
s
s
s
s
B4871
135,54 MHz
SMD ceramic package
QCC12C
2,54
111
000
111
000
111
000
111
000
12
11
Low-loss IF filter for mobile telephone
Channel selection in AMPS / D-AMPS systems
Filter surface passivated
Balanced or unbalanced operation possible
Package for
Surface Mounted Technology
(SMT)
2,54
111 11 11
000 00 00
111 11 11
000 00 00
111 11 11
000 00 00
111 11 11
000 00 00
111
000
111
000
1
2
3
1,4
11
00
11
00
11
00
11
00
11
00
11
00
11
00
11
00
4
1,0
bottom view
6
5
111
000
111
000
111
000
111 111 11 11
000 000 00 00
111 11 11
000 00 00
111 11 11
000 00 00
111 11 11
000 00 00
10
9
8
7
0,6
1,48
Terminals
s
Ni, gold plated
111 11
000 00
111
000
111 11
000 00
111
000
111
00
000
11
111
000
000 00
111 11
111
000
000 00
111 11
111
000
side view
5,0
top view
7,0
Dimensions in mm, approx. weight 0,25 g
Pin configuration
12
6
10
4
3,9
1,2,7,8
Input
Output
Balanced input or input ground
Balanced output or output ground
Case ground
Not connected
Type
B4871
Ordering code
B39141-B4871-H310
Marking and Package
according to
C61157-A7-A95
Packing
according to
F61074-V8170-Z000
Electrostatic Sensitive Device
(ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
T
stg
V
DC
P
s
– 30/+ 85
– 40/+ 85
13
10
˚C
˚C
V
dBm
2
Jan 03, 2003
SAW Components
Low Loss Filter for Mobile Communication
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B4871
135,54MHz
T
= -30˚C ... 85˚C
Z
S
= 850
Ω
|| - 0,8 pF
Z
L
= 850
Ω
|| - 0,8 pF
min.
Nominal frequency
3 dB Bandwidth
Minimum insertion attenuation
(including losses in the matching network)
Amplitude ripple
(p-p)
f
N
– 10,0 kHz ... f
N
+
f
N
– 13,0 kHz ... f
N
+
Group delay ripple
(p-p)
f
N
– 13,0 kHz ... f
N
+
α
min
typ.
135,54
58
4,2
max.
—
—
5,3
MHz
kHz
dB
f
N
—
—
—
∆α
10,0 kHz
13,0 kHz
∆τ
13,0 kHz
α
rel
14
40
50
55
55
24
50
56
65
70
—
—
—
—
—
dB
dB
dB
dB
dB
—
2,0
10,0
µs
—
—
0,2
0,5
1,5
3,0
dB
dB
Relative attenuation
(relative to
α
min
)
f
N
±
60,0 kHz ... f
N
±
120,0 kHz
f
N
±
120,0 kHz ... f
N
±
240,0 kHz
f
N
±
240,0 kHz ... f
N
±
1000,0 kHz
f
N
±
330,0 kHz
f
N
±
660,0 kHz
Impedance
within the passband
Input:
Z
IN
=
R
IN
||
C
IN
Output:
Z
OUT
=
R
OUT
||
C
OUT
Temperature coefficient of frequency
1)
Turnover temperature
1)
Temperature
—
—
850 || 0,8
850 || 0,8
– 0,034
25
—
—
—
—
Ω
|| pF
Ω
|| pF
ppm/K
2
˚C
TC
f
T
0
—
—
dependance of
f
c
:
f
c
(T) =
f
c
(T
0
)(1 +
TC
f
(T –
T
0
)
2
)
3
Jan 03, 2003
SAW Components
Low Loss Filter for Mobile Communication
Data Sheet
Test matching networks to 50
Ω
(element values depend on pcb layout)
a) Unbalanced - unbalanced matching network
Input: Pin 12
Output: Pin 6
L
s1
= 220 nH
C
p2
= 3,3 pF
C
p3
= 3,3 pF
L
s4
= 220 nH
B4871
135,54 MHz
b) Balanced - balanced matching network
Input: Pins 12 and 10
Output: Pins 6 and 4
C
s1
= 15 pF
C
s2
= 12 pF
L
p1
= 150 nH
L
p2
= 150 nH
C
s3
= 15 pF
C
s4
= 12pF
Note :
The balanced - balanced network is realized using TOKO 1:1 baluns B5FL. The insertion attenu-
ation of each balun is 0,6 dB at f
N
. The loss of the baluns is not included in the specified filter
insertion attenuation. S-Parameters of the TOKO 1:1 balun B5FL are available on request.
The level of ultimate suppression may be limited by electromagnetic feedthrough depending on
the layout of the pcb and the arrangement of the matching components.
The above mentioned characteristics can be realized either in balanced or in unbalanced mode
of operation.
For more details see our application note
PCB Layout for Highly Selective IF Filters.
4
Jan 03, 2003
SAW Components
Low Loss Filter for Mobile Communication
Data Sheet
Normalized transfer function passband
(measured single ended - single ended)
B4871
135,54MHz
Normalized transfer function wideband
(measured single ended - single ended)
5
Jan 03, 2003
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