ETC B3844

SAW Components
Preliminary Data Sheet B3844
SAW Components
B3844
Low-Loss Filter
423,25 MHz
Preliminary Data Sheet
Ceramic package QCC12B
Features
● Low-loss filter
● Temperature stable
● Package for Surface Mounted Technology
(SMT)
● Hermetically sealed ceramic package
Terminals
● Gold-plated
Dimensions in mm, approx.
Pin configuration
10
12
4
6
1, 2, 3, 7, 8, 9
Input
Input ground or bal. input
Output
Output ground or bal. output
To be grounded
Type
Ordering code
B3844
B39421B3844Z910
Marking and Package
according to
C61157A0007A052
Packing
according to
F61074V8038Z000
Electrostatic Sensitive Device (ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
Tstg
VDC
Ps
– 45/+ 85
– 40/+ 85
0
10
2
˚C
˚C
V
dBm
Jun 4, 2001
source impedance 75 Ω
SAW Components
B3844
Low-Loss Filter
423,25 MHz
Preliminary Data Sheet
Characteristics
Operating temperature:
Terminating source impedance:
Terminating load impedance:
T = -40 ... +85 ˚C
ZS = 75 Ω and matching network
ZL = 75 Ω and matching network
Nominal frequency
fN
Insertion attenuation at fN (T=25 ˚C)
αN
Variation of insertion att. (rel. to αN)
αrel
Frequency response
3 dB Lower frequency
3 dB Upper frequency
35 dB Lower frequency
35 dB Upper frequency
fL 3dB
fU 3dB
fL35dB
fU35dB
Amplitude ripple (peak to adjacent valley)
fN ± 100 kHz
typ.
max.
—
423,25
—
4,5
—
—
423,75
420,25
—
—
5,7
—
MHz
7,5
dB
±0,9
dB
422,27
424,23
420,75
425,85
422,75
—
—
426,25
0,3
0,5
MHz
MHz
MHz
MHz
dB
αrel
Relative attenuation
fN - 200,0 MHz ... fN - 10,0 MHz
fN - 10,0 MHz ... fN - 3,0 MHz
fN + 3,0 MHz ... fN + 10,0 MHz
fN + 10,0 MHz ... fN + 200,0 MHz
Temperature coefficient of frequency
Turnover temperature
min.
1)
40
35
35
40
55
41
43
48
—
—
—
—
dB
dB
dB
dB
TCf
—
– 0,036
—
ppm/K2
T0
—
25
—
˚C
Matching circuit:
Cp1 = 12 pF 2)
Ls2 = 22 nH 2)
Ls3 = 18 nH 2)
Cp4 = 10 pF 2)
1) Temperature
2)
dependance of fc:
fc(TA) = fc(T0)(1 + TCf(TA – T0)2)
Element values depend on PCB layout
3
Jun 4, 2001
SAW Components
B3844
Low-Loss Filter
423,25 MHz
Preliminary Data Sheet
Normalized frequency response
Normalized frequency response
4
Jun 4, 2001
SAW Components
B3844
Low-Loss Filter
423,25 MHz
Preliminary Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC IS,
P.O. Box 80 17 09, 81617 Munich, GERMANY
 EPCOS AG 2002. 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
Jun 4, 2001