4

May 24, 2007

B3776

868.30 MHz

Please read

cautions and warnings and

important notes at the end of this document.

SAW Components

SAW filter

Data sheet

Characteristics

Temperature range for specification:

T

= –40 ˚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

—

3.6

4.3

dB

excl. loss in matching elements

—

2.7

3.4

dB

Maximum insertion attenuation

α

max

868.15 ...

868.45 MHz

—

4.1

5.2

dB

excl. loss in matching elements

—

3.2

4.3

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

620.00 MHz

48

53

—

dB

620.00 ...

680.00 MHz

40

44

—

dB

680.00 ...

855.00 MHz

48

52

—

dB

855.00 ...

864.00 MHz

25

29

—

dB

864.00 ...

867.20 MHz

17

20

—

dB

867.20 ...

867.60 MHz

2

20

—

dB

869.50 ...

876.00 MHz

12

15

—

dB

876.00 ...

883.00 MHz

32

37

—

dB

883.00 ...

900.00 MHz

45

50

—

dB

900.00 ... 1500.00 MHz

50

55

—

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:

—

450 || 0.9

—

Ω || pF

—

450 || 0.9

—

Ω || pF