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SAW Components
Data Sheet B3780
SAW Components Low-loss Filter Data Sheet
B3780 433,92 MHz
Ceramic package QCC8B
Features
s RF low-loss filter for remote control receivers s Package for Surface Mounted Technology
(SMT)
s Balanced and unbalanced operation possible s Passivation layer: Elpas s AEC-Q200 qualified component family
Terminals
s Ni, gold plated
typ. dimensions in mm, approx. weight 0,07 g
Pin configuration 1) 1 2 5 6 4,8 3,7 Input Ground (recommended) or Input Input (recommended) or Input Ground Output (recommended) or Output Ground Output Ground (recommended) or Output Case - Ground to be grounded
Type B3780
Ordering code B39431-B3780-Z810
Marking and package according to C61157-A7-A46
Packing according to F61074-V8167-Z000
Electrostactic Sensitive Device (ESD)
Maximum ratings Operable temperature range TA Storage temperature range Tstg VDC DC voltage Source power PS
1) The
–45/+120 –45/+120 6 10
˚C ˚C V dBm
source impedance 50 Ω
recommended pin configuration usually offers best suppression of electrical crosstalk.The
filter characteristics refer to this configuration. 2 Dec 22, 2004
SAW Components Low-loss Filter Data Sheet
Characteristics Reference temperature: Terminating source impedance: Terminating load impedance:
B3780 433,92 MHz
TA = –40 ... +85˚C ZS = 50 Ω and matching network ZL = 50 Ω and matching network
min. typ. 433,92 max. — MHz
Center frequency (center frequency between 3 dB points) Minimum insertion attenuation including loss in matching elements excluding loss in matching elements Pass band (relative to αmin) 433,645 ... 434,195 MHz Filter bandwidth αrel≤ 3 dB Relative attenuation (relative to αmin) 10,00 ... 414,00 414,00 ... 425,00 425,00 ... 431,50 431,50 ... 433,00 434,92 443,00 530,00 670,00 830,00 1000,00 ... 443,00 ... 530,00 ... 670,00 ... 830,00 ...1000,00 ...2500,00
fC
—
αmin — — 2,0 1,6 2,8 2,4 dB dB
—
0,9
3,0
dB
780 αrel
850
920
kHz
MHz MHz MHz MHz MHz MHz MHz MHz MHz MHz
48 42 28 18 14 36 55 45 60 43
53 47 33 21 18 41 60 50 65 48
— — — — — — — — — —
dB dB dB dB dB dB dB dB dB dB
Impedance for pass band matching 1) Input: ZIN = RIN || CIN Output: ZOUT = ROUT || COUT
— —
330 || 1,9 330 || 1,9
— —
Ω || pF Ω || pF
1) Power matching of the SAW filter requires a certain source and load impedance. This characteristic impedance is provided by the 50 Ohm environment and a wideband matching network at input and output. After removing the SAW filter, the conjugate complex impedance values of the input and output matching network including the 50 Ohm environment are calculated.
For more details, we refer to EPCOS application note #4.
3
Dec 22, 2004
SAW Components Low-loss Filter Data Sheet
Matching network to 50 Ω (element values depend on pcb layout and equivalent circuit) Cp1 = 1,5 pF Ls2 = 39 nH Ls3 = 39 nH Cp4 = 1,5 pF
B3780 433,92 MHz
Minimising the crosstalk For a good ultimate rejection a low crosstalk is necessary. Low crosstalk can be rea.