3

August 27, 2007

B3792

315.00 MHz

SAW Components

SAW filter

Data sheet

Please read

cautions and warnings and

important notes at the end of this document.

Characteristics

Temperature range for specification:

T

= –30 ˚C to +80 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

@ 25 ˚C

max.

Center frequency

—

315.00

—

MHz

Minimum insertion attenuation

α

min

incl. loss in matching elements

—

3.5

4.6

dB

excl. loss in matching elements

—

2.6

3.7

dB

Pass band (relative to

α

314.95 ...

315.05 MHz

—

0.5

1.5

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

200.00 MHz

70

75

—

dB

200.00 ...

270.00 MHz

50

55

—

dB

270.00 ...

304.30 MHz

60

65

—

dB

304.30 ...

314.15 MHz

45

50

—

dB

314.15 ...

314.40 MHz

32

38

—

dB

315.60 ...

318.15 MHz

28

34

—

dB

318.15 ...

325.70 MHz

45

50

—

dB

325.70 ...

530.00 MHz

54

60

—

dB

530.00 ... 1000.00 MHz

60

65

—

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:

=

||

—

760 || 1.4

—

Ω || pF

Output:

—

740 || 1.2

—

Ω || pF