3

March 22, 2010

B3730

433.92 MHz

SAW Components

SAW RF filter

Data sheet

Please read

cautions and warnings and

Characteristics

Temperature range for specification:

T

= –45 ˚C to +105 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

@ 25 ˚C

max.

Center frequency

—

433.92

—

MHz

Minimum insertion attenuation

α

min

—

2.4

3.1

dB

excl. loss in matching elements

—

1.7

2.4

dB

Pass band (relative to

α

433.78 ...

434.06 MHz

—

0.6

2.0

dB

433.74 ...

434.10 MHz

—

0.8

3.0

dB

433.70 ...

434.14 MHz

—

1.2

6.0

dB

Filter bandwidth

α

0.65

0.72

0.79

MHz

Relative attenuation (relative to

α

α

rel

10.00 ...

414.00 MHz

53

58

—

dB

414.00 ...

423.50 MHz

48

53

—

dB

423.50 ...

431.52 MHz

35

40

—

dB

431.52 ...

432.90 MHz

20

24

—

dB

432.90 ...

433.10 MHz

17

24

—

dB

434.92 ...

444.00 MHz

15

19

—

dB

444.00 ...

500.00 MHz

45

50

—

dB

500.00 ...

810.00 MHz

50

54

—

dB

810.00 ... 1500.00 MHz

60

65

—

dB

1500.00 ... 2500.00 MHz

55

60

—

dB

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.

Input:

—

250 || 2.9

—

Ω || pF

—

250 || 2.9

—

Ω || pF