RF Filters for Cellular Phones
Series/Type:
B7901
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39182B7901K410
Substitute Product
B39182B9427K610
Date of Withdrawal
2009-04-03
Deadline Last
Orders
2009-07-15
Last Shipments
2009-10-15
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 Filter
Data Sheet
Application
s
Low loss RF filter for mobile telephone K-PCS sys-
s
s
s
s
s
B7901
1855.0 MHz
tems, receive path (Rx)
Low insertion attenuation
Low amplitude ripple
Usable passband 30.0 MHz
Unbalanced to balanced operation
Impedance transformation from 50
Ω
to 100
Ω
Features
s
s
s
s
s
s
s
0.735
0,075
2
3
Package size 2.0 x1.4 x 0.68 mm
3
Package code QCS5E
RoHS compatible
Approx. weight 0.007g
Package for
Surface Mount Technology
(SMT)
Ni, gold-plated terminals
Electrostatic Sensitive Device
(ESD)
0,38
0,075
0,44
5
4
bottom view
1
0,68
side view
2,0
1,4
top view
Pin configuration
s
1
s
3,4
s
2,5
Input, unbalanced
Output, balanced
Case-ground
Please read
cautions and warnings and
important notes
at the end of this document.
2
May 10, 2006
SAW Components
SAW Rx Filter
Data Sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
T = –30 °C to +85 °C
Z
S
=
50
Ω
Z
L
= 100
Ω
(balanced)
B7901
1855.0 MHz
min.
Center frequency
Maximum insertion attenuation
1840.0 ... 1870.0
Amplitude ripple
(p-p)
1840.0 ... 1870.0
Input VSWR
1840.0 ... 1870.0
Output VSWR
1840.0 ... 1870.0
MHz
—
MHz
—
MHz
∆α
MHz
—
f
C
α
max
—
—
typ.
@ 25˚C
1855.0
1.6
0.3
1.4
1.5
max.
—
2.4
1)
0.8
1.8
1.9
MHz
dB
dB
Output amplitude balance
(|S
31
/S
21
|)
1840.0 ... 1870.0 MHz
Output phase balance
(φ(S
31
)−φ(S
21
)+180°)
1840.0 ... 1870.0 MHz
Attenuation
10.0
1750.0
1930.0
1975.0
2020.0
2100.0
2500.0
2650.0
1)
–1.0
-0.3/0.3
1.0
dB
–10
α
-5/+5
10
°
...
...
...
...
...
...
...
...
1750.0
1780.0
1975.0
2020.0
2100.0
2500.0
2650.0
4000.0
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
42
37
28
36
40
45
42
45
49
40
32
42
46
49
45
60
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
2.2 dB max. at 25
°C
Please read
cautions and warnings and
important notes
at the end of this document.
3
May 10, 2006
SAW Components
SAW Rx Filter
Data Sheet
B7901
1855.0 MHz
Maximum ratings
Operable temperature range T
Storage temperature range
DC voltage
ESD voltage
Input Power at
1750...1780 MHz
Tx band
1)
–40/+85
–40/+85
5
50
1)
5
°C
°C
V
V
dBm
machine model, 10 pulses
continuous wave
T
stg
V
DC
V
ESD
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.
4
May 10, 2006
SAW Components
SAW Rx Filter
Data Sheet
Transfer function
(narrowband)
B7901
1855.0 MHz
Transfer function
(wideband)
Please read
cautions and warnings and
important notes
at the end of this document.
5
May 10, 2006
