SAW filters for mobile communications
Series/Type:
B7837
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39941B7837K410
Substitute Product
B39941B9401K610
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
Low-Loss Filter for Mobile Communication
Data Sheet
B7837
942,5 MHz
Chip Size SAW package QCS5E
Features
q
Low-loss RF filter for mobile telephone
q
q
q
q
q
q
q
q
0.735
0,075
2
3
EGSM system, receive path
Very low insertion attenuation
Low amplitude ripple
Usable passband 35 MHz
Unbalanced to balanced operation
Impedance transformation from 50
Ω
to 150
Ω
Suitable for GPRS class 1 to 12
Package for
Surface Mounted Technology
(SMT)
Pb-free
0,38
0,075
0,44
5
4
bottom view
1
0,68
2,0
side view
Terminals
1,4
Input, unbalanced
Output, balanced
Case ground
Marking and Package
according to
C61157-A7-A131
q
Ni, gold-plated
top view
Dimensions in mm, approx. weight 0,007g
Pin configuration
1
3, 4
2, 5
Type
B7837
Ordering code
B39941-B7837-K410
Packing
according to
F61074-V8151-Z000
Electrostatic Sensitive Device
(ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
ESD voltage
Input Power at
GSM850, GSM900
GSM1800, GSM1900
Tx bands
T
T
stg
V
DC
V
ESD
P
IN
– 30 / + 85
– 40 / + 85
5
100*
15
˚C
˚C
V
V
dBm
machine model, 10 pulses
peak power of GSM signal,
duty cycle 4:8
* - acc. to JESD22-A115A (Machine Model), 10 negative & 10 positive pulses
2
Mar 31 2004
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B7837
942,5 MHz
T
= 25 ˚C
Z
S
= 50
Ω
Z
L
= 150
Ω
|| 82 nH (balanced)
min.
typ.
942,5
max.
—
MHz
Center frequency
Maximum insertion attenuation
925,0 ... 960,0
Amplitude ripple
(p-p)
925,0 ... 960,0
Input VSWR
925,0 ... 960,0
Output VSWR
925,0 ... 960,0
Attenuation
0,0
480,0
905,0
980,0
1000,0
1850,0
... 480,0 MHz
... 905,0 MHz
... 915,0 MHz
...1000,0 MHz
...1850,0MHz
...6000,0MHz
MHz
MHz
MHz
f
C
α
max
MHz
∆α
—
—
1,4
1,7
dB
—
0,7
1,0
dB
—
1,8
2,0
—
1,8
2,0
45
30
25
25
28
40
53
34
27
29
38
44
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
Amplitude balance
(|S
31
/S
21
|)
925,0 ... 960,0
phase balance
(φ(S
31
)−φ(S
21
)+180˚)
925,0 ... 960,0
Diff. to common mode suppression
925,0 ... 960,0
824,0 ... 995,0
1648,0 ... 1990,0
3296,0 ... 3980,0
MHz
-1,0
-0,5 / +0,7
1,0
dB
MHz
S
sc12
MHz
MHz
MHz
MHz
-5
-3 / +2
5
degree
22
22
22
20
29
29
45
48
—
—
—
—
dB
dB
dB
dB
3
Mar 31 2004
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B7837
942,5 MHz
T
= -10 to +80 ˚C
Z
S
= 50
Ω
Z
L
= 150
Ω
|| 82 nH (balanced)
min.
typ.
942,5
max.
—
MHz
Center frequency
Maximum insertion attenuation
925,0 ... 960,0
Amplitude ripple
(p-p)
925,0 ... 960,0
Input VSWR
925,0 ... 960,0
Output VSWR
925,0 ... 960,0
Attenuation
0,0
480,0
905,0
980,0
1000,0
1850,0
... 480,0 MHz
... 905,0 MHz
... 915,0 MHz
...1000,0 MHz
...1850,0MHz
...6000,0MHz
MHz
MHz
MHz
f
C
α
max
MHz
∆α
—
—
1,5
2,0
1)
dB
—
0,8
1,2
dB
—
1,8
2,0
—
1,8
2,0
45
30
20
2)
25
28
40
53
34
27
29
38
44
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
Amplitude balance
(|S
31
/S
21
|)
925,0 ... 960,0
phase balance
(φ(S
31
)−φ(S
21
)+180˚)
925,0 ... 960,0
Diff. to common mode suppression
925,0 ... 960,0
824,0 ... 995,0
1648,0 ... 1990,0
3296,0 ... 3980,0
MHz
-1,0
-0,5 / +0,7
1,0
dB
MHz
S
sc12
MHz
MHz
MHz
MHz
-5
-3 / +2
5
degree
22
22
22
20
29
29
45
48
—
—
—
—
dB
dB
dB
dB
1
)
2,2 dB for T= -30˚C to +85˚C
2
) 17 dB for T= -30˚C to +85˚C
4
Mar 31 2004
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Transfer function (passband)
B7837
942,5 MHz
Transfer function (wideband)
5
Mar 31 2004
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