3

December 20, 2012

B3774

433.92 MHz

SAW Components

SAW filter

Data sheet

Please read

cautions and warnings and

Characteristics

Temperature range for specification:

T

= –45 ˚C to +95 ˚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

433.77 ...

434.07 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

Relative attenuation (relative to

α

α

rel

10.00 ...

414.00 MHz

53

57

—

dB

414.00 ...

426.00 MHz

48

53

—

dB

426.00 ...

430.50 MHz

24

28

—

dB

430.50 ...

431.72 MHz

30

35

—

dB

431.72 ...

431.97 MHz

40

52

—

dB

431.97 ...

432.07 MHz

30

52

—

dB

432.07 ...

432.12 MHz

25

52

—

dB

432.12 ...

433.10 MHz

15

18

—

dB

434.92 ...

444.00 MHz

15

20

—

dB

444.00 ...

500.00 MHz

40

45

—

dB

500.00 ... 1600.00 MHz

50

55

—

dB

1600.00 ... 2500.00 MHz

45

50

—

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:

—

240 || 3.0

—

Ω || pF

—

240 || 3.0

—

Ω || pF