3

April 01, 2008

B3576

315.00 MHz

SAW Components

SAW RF filter

Data sheet

Please read

cautions and warnings and

important notes at the end of this document.

Characteristics

Temperature range for specification:

T

= –40 ˚C to +95 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

@ 25 ˚C

max.

Center frequency

—

315.00

—

MHz

(center frequency between 3 dB pionts)

Minimum insertion attenuation

α

min

314.90 ...

315.10 MHz

—

3.3

4.8

dB

(including loss in matching coils)

Amplitude ripple (p-p)

314.92 ...

315.08 MHz

—

0.7

2.0

dB

314.90 ...

315.10 MHz

—

1.0

3.0

dB

Relative attenuation (relative to

α

α

rel

10.00 ...

230.00 MHz

65

70

—

dB

230.00 ...

290.00 MHz

40

45

—

dB

290.00 ...

310.00 MHz

50

55

—

dB

310.00 ...

314.10 MHz

42

47

—

dB

315.90 ...

317.00 MHz

21

26

—

dB

317.00 ...

322.00 MHz

38

43

—

dB

322.00 ... 1000.00 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:

—

470 || 2.0

—

Ω || pF

—

470 || 2.0

—

Ω || pF

—

–0,03

—

Frequency inversion point

10—40

°C

Maximum ratings

–45/+125 ˚C

Storage temperature range

–45/+125 ˚C

DC voltage

6

V

Source power

Source power

10

12

dBm

dBm

source impedance 50

Ω

duty cycle 1:10