B3571 [EPCOS]
SAW Components Low-loss Filter 868,60 MHz; 声表面波元件低损耗滤波器868,60兆赫型号: | B3571 |
厂家: | EPCOS |
描述: | SAW Components Low-loss Filter 868,60 MHz |
文件: | 总6页 (文件大小:72K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SAW Components
Data Sheet B3571
SAW Components
Low-loss Filter
Data Sheet
B3571
868,60 MHz
Ceramic package QCC8C
Features
■ RF low-loss filter for remote control receivers
■ Package for Surface Mounted Technology
(SMT)
Terminals
■ Ni, gold plated
typ. dimensions in mm, approx. weight 0,1 g
Pin configuration
2
Input
1,3
6
Input Ground
Output
5,7
4,8
Output Ground
Case - Ground
Type
B3571
Ordering code
Marking and package
according to
Packing
according to
B39871-B3571-U310
C61157-A7-A56
F61074-V8070-Z000
Electrostactic Sensitive Device (ESD)
Maximum ratings
Operable temperature range TA
Storage temperature range Tstg
–45/+90
˚C
˚C
–45/+90
DC voltage
VDC
PS
0
0
V
Source power
dBm
source impedance 50 Ω
2
May 09, 2001
SAW Components
Low-loss Filter
Data Sheet
B3571
868,60 MHz
Characteristics
Reference temperature:
TA = 25 ˚C
Terminating source impedance:
Terminating load impedance:
ZS = 50 Ω and matching network
ZL = 50 Ω and matching network
min.
typ.
max.
fC
—
868,69
—
MHz
dB
Center frequency
(center frequency between 3 dB points)
Minimum insertion attenuation
αmin
868,00 ... 869,38 MHz
—
3,1
4,6
Pass band (relative to αmin
)
868,00 ... 869,38 MHz
867,92 ... 869,46 MHz
—
—
1,5
2,0
3,0
6,0
dB
dB
Relative attenuation (relative to αmin
)
αrel
10,00 ... 700,00 MHz
700,00 ... 830,00 MHz
830,00 ... 858,00 MHz
858,00 ... 866,40 MHz
871,00 ... 880,00 MHz
880,00 ... 910,00 MHz
910,00 ...1000,00 MHz
50
33
30
20
17
30
33
55
38
35
25
22
35
38
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
Impedance for pass band matching 2)
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
—
—
226 || 2,30
222 || 2,20
—
—
Ω || pF
Ω || pF
Temperature coefficient of frequency 1)
Frequency inversion point
TCf
T0
—
—
–0,03
25
—
—
ppm/K2
°C
1)Temperature dependence of fC: fC(TA) = fC(T0) (1 + TCf(TA – T0)2)
2) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to
source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped-
ance into the input matching / output matching network is calculated.
The conjugate complex value of these characteristic impedances are the input and output imped-
ances for flat passband. For more details, we refer to EPCOS application note #4.
3
May 09, 2001
SAW Components
Low-loss Filter
Data Sheet
B3571
868,60 MHz
Matching network to 50 Ω (element values depend on pcb layout and equivalent circuit)
Cp1 = 3,3 pF
Ls2 = 15 nH
Ls3 = 15 nH
Cp4 = 3,3 pF
Minimising the crosstalk
For a good ultimate rejection a low crosstalk is necessary. Low crosstalk can be realised with
a good RF layout.
Grounding pins for input transducer are pin 1,3 and for output transducer 5,7. Close to those
pins via holes (through holes) should be placed to achieve a low impedance path to system
ground. If a grounding plane at the top side of the PCB is present, the grounding plane can be
connected to pin 1,3,5,7 at the top side too.
The optimised PCB layout, including matching network for transformation to 50 Ohm, is shown
here.
Optimised PCB layout for SAW filters in QCC8C package, pinning 2,6 (top side, scale 1:1)
The bottom side is a copper plane (system ground area).
For good contact of the upper grounding area with the lower side it is necessary to place
enough via holes.
4
May 09, 2001
SAW Components
Low-loss Filter
Data Sheet
B3571
868,60 MHz
Normalized frequency response
Normalized frequency response (wideband)
5
May 09, 2001
SAW Components
Low-loss Filter
Data Sheet
B3571
868,60 MHz
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW CE AE PD
P.O. Box 80 17 09, D-81617 München
EPCOS AG 2001. All Rights Reserved.
As far as patents or other rights of third parties are concerned, liability is only assumed for compo-
nents per se, not for applications, processes and circuits implemented within components or
assemblies.
The information describes the type of component and shall not be considered as assured
characteristics.
Terms of delivery and rights to change design reserved.
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.
6
May 09, 2001
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