SAW filters for mobile communications
Series/Type:
B9720
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39941B9720F210
Substitute Product
B39941B9503L310
Date of Withdrawal
2009-04-30
Deadline Last
Orders
2009-10-31
Last Shipments
2010-01-31
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
SAW Rx 2in1 filter
Data Sheet
Revision History: Changes compared to previous iteration issue
ISSUE
2.0
ORIGINATOR
M. Schmachtl
DETAIL SPEC CHANGES
initial release
B9720
881.5 / 942.5 MHz
DATE
16.10.2007
Please read
cautions and warnings and
important notes
at the end of this document.
2
October 16, 2007
SAW Components
SAW Rx 2in1 filter
Data Sheet
Application
s
Low-loss
s
B9720
881.5 / 942.5 MHz
s
s
s
s
2in1 RF filter for mobile telephone
GSM 850 and GSM 900 systems, receive path (Rx)
Usable passband:
Filter 1 (GSM 850): 25 MHz
Filter 2 (GSM 900): 35 MHz
Unbalanced to balanced operation for both filters
Impedance transformation from 50
Ω
to 150
Ω
for
both filters
Low amplitude ripple
Suitable for GPRS class 1 to 12
Features
s
s
s
s
s
s
s
0,55
0,20
1
2
3
0,45
4
Package size 1.7 x1.3 x 0.45 mm
3
Package code QCS10M
RoHS compatible
Approx. weight 0.004g
Package for
Surface Mount Technology
(SMT)
Ni, gold-plated terminals
Electrostatic Sensitive Device
(ESD)
0,225
0,20
1,3
0,45
10
5
bottom view
0,075
9
0,25
8
7
6
0,075
side view
1,7
top view
Pin configuration
s
s
s
s
s
1
4
6,7
8,9
2,3,5,10
Input [ Filter 1]
Input [ Filter 2 ]
Output balanced [ Filter 2]
Output balanced [ Filter 1 ]
Case ground
1
9
8
7
t.b.d.
4
2,3,5,10
6
Please read
cautions and warnings and
important notes
at the end of this document.
3
October 16, 2007
SAW Components
SAW Rx 2in1 filter
Data Sheet
Characteristics of Filter 1 (GSM850)
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
B9720
881.5 / 942.5 MHz
T
=
Z
S
=
Z
L
=
-20 to +75 ˚C
50
Ω
(unbalanced)
150
Ω
(balanced) || 82nH
min.
Center frequency
Maximum insertion attenuation
869.0 ...
Amplitude ripple
(p-p)
869.0 ...
Input VSWR
869.0 ...
Output VSWR
869.0 ...
894.0
MHz
—
894.0
MHz
—
894.0
894.0
MHz
∆α
MHz
—
f
C
α
max
—
—
typ.
@ 25 ˚C
881.5
max.
—
MHz
1.2
0.4
1.6
1.5
1.9
1.1
2.0
2.0
dB
dB
Output amplitude balance
(|S
31
/S
21
|)
869.0 ... 894.0 MHz
Output phase balance
(φ(S
31
)-φ(S
21
))+180˚
869.0 ... 894.0 MHz
Attenuation
10.0
447.0
914.0
954.0
1738.0
1788.0
3476.0
...
...
...
...
...
...
...
447.0
849.0
954.0
1738.0
1788.0
3476.0
6000.0
MHz
MHz
MHz
MHz
MHz
MHz
MHz
α
-1.0
-0.5/0.2
1.0
dB
-10
-2/3
10
˚
45
30
25
28
40
35
35
55
35
29
32
53
40
39
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
Please read
cautions and warnings and
important notes
at the end of this document.
4
October 16, 2007
SAW Components
SAW Rx 2in1 filter
Data Sheet
B9720
881.5 / 942.5 MHz
Maximum ratings of Filter 1
Operable temperature range T
Storage temperature range
DC voltage
ESD voltage
Input Power at
GSM 850, GSM 900
GSM 1800, GSM 1900
Tx bands
1)
–40/+85
–40/+85
5
100
1)
15
15
˚C
˚C
V
V
dBm
dBm
machine model, 10 pulses
effective power in the on-state,
duty cycle 4:8
T
stg
V
DC
V
ESD
P
IN
P
IN
acc. to JESD22-A115A (machine model), 10 negative & 10 positive pulses.
Please read
cautions and warnings and
important notes
at the end of this document.
5
October 16, 2007
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