3

June 11, 2010

B3744

868.30 MHz

SAW Components

SAW 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

—

868.30

—

MHz

Minimum insertion attenuation

α

min

incl. loss in matching elements

—

3.0

3.7

dB

excl. loss in matching elements

—

2.4

3.1

dB

Pass band (relative to

α

868.10 ...

868.50 MHz

—

0.4

1.5

dB

868.00 ...

868.60 MHz

—

0.5

3.0

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

620.00 MHz

55

60

—

dB

620.00 ...

750.00 MHz

45

50

—

dB

750.00 ...

857.00 MHz

40

44

—

dB

857.00 ...

861.00 MHz

36

40

—

dB

861.00 ...

866.80 MHz

22

26

—

dB

866.80 ...

867.20 MHz

10

27

—

dB

869.80 ...

871.50 MHz

15

20

—

dB

871.50 ...

887.50 MHz

28

35

—

dB

887.50 ... 1000.00 MHz

42

46

—

dB

1000.00 ... 2500.00 MHz

50

54

—

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:

—

290 || 1.3

—

Ω || pF

—

290 || 1.3

—

Ω || pF