B39431B3730H110【PDF 3/11 页】FILTER SAW 433.92MHZ SMD

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SAW Components

SAW RF filter

Data sheet

Characteristics

Temperature range for specification:

Terminating source impedance:

Terminating load impedance:

T = –45 ?C to +105 ?C

Z S = 50 ? and matching network

Z L = 50 ? and matching network

B3730

433.92 MHz

min.

typ.

@ 25 ?C

max.

Center frequency

f C

—

433.92

—

MHz

Minimum insertion attenuation

α min

incl. loss in matching elements (Q L = 47)

excl. loss in matching elements

—

—

2.4

1.7

3.1

2.4

dB

dB

Pass band (relative to α min )

433.78 ... 434.06 MHz

433.74 ... 434.10 MHz

433.70 ... 434.14 MHz

—

—

—

0.6

0.8

1.2

2.0

3.0

6.0

dB

dB

dB

Filter bandwidth

α rel ≤ 3 dB

0.65

0.72

0.79

MHz

Relative attenuation (relative to α min )

α rel

10.00 ... 414.00 MHz

414.00 ... 423.50 MHz

423.50 ... 431.52 MHz

431.52 ... 432.90 MHz

432.90 ... 433.10 MHz

434.92 ... 444.00 MHz

444.00 ... 500.00 MHz

500.00 ... 810.00 MHz

810.00 ... 1500.00 MHz

1500.00 ... 2500.00 MHz

53

48

35

20

17

15

45

50

60

55

58

53

40

24

24

19

50

54

65

60

—

—

—

—

—

—

—

—

—

—

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

Impedance for pass band matching 1)

Input: Z IN = R IN || C IN

Output: Z OUT = R OUT || C OUT

—

—

250 || 2.9

250 || 2.9

—

—

? || pF

? || pF

1)

Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load

impedance (here 50 Ohm). After removal of the SAW filter the input impedance of the input and output match-

ing network is calculated. The conjugate complex value of these characteristic impedances are the input and

output impedances for flat passband. For more details we refer to EPCOS application note #4.

Please read cautions and warnings and

important notes at the end of this document.

3

March 22, 2010

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