EPCOS B4812 Saw components low-loss filter 246,01 mhz Datasheet

SAW Components
Data Sheet B4812
SAW Components
B4812
246,01 MHz
Low-Loss Filter
Data Sheet
Ceramic package QCC10B
Features
●
●
●
●
Low-loss IF filter for mobile telephone
Channel selection in GSM systems
Hermetically sealed ceramic SMD package
Balanced and unbalanced operation possible
Terminals
● Gold-plated Ni
Dimensions in mm, approx. weight 0,23 g
Pin configuration
4
5
9
10
1, 3, 6, 8
2, 7
Input
Input ground or balanced input
Output
Output ground or balanced output
Case – ground
Ground
Type
Ordering code
B4812
B39251-B4812-Z710
Marking and Package
according to
C61157-A7-A49
Electrostatic Sensitive Device (ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
Tstg
VDC
Ps
– 25/+ 85
– 25/+ 85
0
10
2
˚C
˚C
V
dBm
Jul 11, 2003
Packing
according to
F61074-V8127-Z000
SAW Components
B4812
246,01 MHz
Low-Loss Filter
Data Sheet
Characteristics
T = 25 ˚C
ZS = 700 Ohm || -2,6 pF
ZL = 700 Ohm || -2,6 pF
Reference temperature:
Terminating source impedance:
Terminating load impedance:
min.
Nominal frequency
fN
Minimum insertion attenuation
(including loss in matching coils)
Amplitude ripple (p-p)
fN - 67,5 kHz
...
fN + 67,5 kHz
fN - 80,0 kHz
...
fN + 80,0 kHz
Group delay ripple (p-p)
fN - 50,0 kHz
...
fN + 50,0 kHz
fN - 80,0 kHz
...
fN + 80,0 kHz
Relative attenuation (relative to αmin)
fN - 25,00 MHz ...
fN - 3,00 MHz
fN - 3,00 MHz ...
fN - 1,60 MHz
fN - 1,60 MHz ...
fN - 0,60 MHz
fN - 0,60 MHz ...
fN - 0,40 MHz
fN - 0,40 MHz ...
fN - 0,20 MHz
αmin
fN + 0,20 MHz
fN + 0,40 MHz
fN + 0,60 MHz
fN + 1,60 MHz
fN + 3,00 MHz
...
...
...
...
...
—
2,0
typ.
max.
246,01
—
MHz
3,2
5,0
dB
—
—
0,6
0,7
2,0
3,0
dB
dB
—
—
0,5
1,2
1,5
3,0
µs
µs
∆α
∆τ
αrel
50
48
38
28
8
60
60
50
40
14
—
—
—
—
—
dB
dB
dB
dB
dB
8
28
38
48
50
14
40
50
60
60
—
—
—
—
—
dB
dB
dB
dB
dB
—
—
Ω || pF
—
700 || 2,6
700 || 2,6
—
Ω || pF
TCf
—
– 0,036
—
ppm/K2
T0
—
25
—
˚C
fN + 0,40 MHz
fN + 0,60 MHz
fN + 1,60 MHz
fN + 3,00 MHz
fN + 25,00 MHz
Impedance at fN
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
Temperature coefficient of frequency 1)
Frequency inversion point
1) Temperature
dependence of fc:
fc(T) = fc(T0)(1 + TCf(T – T0)2)
Test matching network to 50 Ω (element values depend on PCB layout):
Cp1
Ls2
Ls3
Cp4
3
Jul 11, 2003
=
=
=
=
1,8
56
56
1,8
pF
nH
nH
pF
SAW Components
B4812
246,01 MHz
Low-Loss Filter
Data Sheet
Transfer function:
Transfer function (pass band):
4
Jul 11, 2003
SAW Components
B4812
246,01 MHz
Low-Loss Filter
Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC WT
P.O. Box 80 17 09, 81617 Munich, GERMANY
 EPCOS AG 2003. Reproduction, publication and dissemination of this brochure and the information contained therein without EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers’ Association), unless otherwise agreed.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
the international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
the type in question please also contact one of our Sales Offices.
5
Jul 11, 2003
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