3

Jan 05, 2005

SAW Components

X 7256 D

57,00 MHz

Bandpass Filter

Data Sheet

Characteristics of channel 1 (switching pin 2 connected to ground)

Reference temperature:

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Insertion attenuation

α

Reference level for the

57,08 (57,00) MHz

12,0

13,5

15,0

dB

following data

Pass bandwidth

α

—

6,0

—

MHz

α

—

7,5

—

MHz

Relative attenuation

α

rel

54,53 (54,45) MHz

–0,9

0,1

1,1

dB

59,53 (59,45) MHz

–1,0

0,0

1,0

dB

54,03 (53,95) MHz

—

3,1

—

dB

60,03 (59,95) MHz

—

2,8

—

dB

60,39 (60,31) MHz

—

11,0

—

dB

Lower sidelobe

45,08 ... 52,08 (45,00 ... 52,00) MHz

36,0

44,0

—

dB

52,08 ... 53,03 (52,00 ... 52,95) MHz

38,0

46,0

—

dB

Upper sidelobe

60,88 ... 62,58 (60,80 ... 62,50) MHz

28,0

34,0

—

dB

62,58 ... 65,08 (62,50 ... 65,00) MHz

37,0

43,0

—

dB

Reflected wave signal suppression

1,2

µs ... 6,0 µs after main pulse

42,0

52,0

—

dB

(test pulse 250 ns, carrier frequency 57,08 MHz)

Feedthrough signal suppression

1,3

µs ... 1,2 µs before main pulse

—

50,0

—

dB

(test pulse 250 ns, carrier frequency 57,08 MHz)

Group delay ripple (p-p)

∆τ

54,53 ... 59,53 (54,45 ... 59,45) MHz

—

60

—

ns

Impedance at 57,08 MHz

Input:

=

||

—

0,4||19,0

—

k

Ω || pF

Output:

—

0,6|| 6,0

—k

Ω || pF

Temperature coefficient of frequency

—

–72

—

ppm/K