3

Jun 22, 2005

SAW Components

X 6855 D

44,00 MHz

Bandpass Filter

Data Sheet

Characteristics

Reference temperature:

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Center Frequency

—

44,00

—

(center between 3dB points)

Insertion attenuation

α

Reference level for the

44,06 (44,00) MHz

15,8

17,3

18,8

dB

following data

Pass bandwidth

α

—

7,9

—

MHz

α

—

9,6

—

MHz

Relative attenuation

α

rel

40,53 (40,47) MHz

—

–0,2

—

dB

47,59 (47,53) MHz

—

1,3

—

dB

40,06 (40,00) MHz

1,2

2,4

—

dB

48,06 (48,00) MHz

2,8

4,0

—

dB

Lower sidelobe

35,06 ... 38,06 (35,00 ... 38,00) MHz

40,0

46,0

—

dB

38,06 ... 39,06 (38,00 ... 39,00) MHz

36,0

44,0

—

Upper sidelobe

49,06 ... 50,26 (49,00 ... 50,20) MHz

35,0

41,0

—

50,26 ... 55,06 (50,20 ... 55,00) MHz

40,0

48,0

—

Reflected wave signal suppression

1,2

µs ... 6,0 µs after main pulse

42,0

54,0

—

dB

(test pulse 250 ns, carrier frequency 44,06 MHz)

Feedthrough signal suppression

1,3

µs ... 1,2 µs before main pulse

50,0

56,0

—

dB

(test pulse 250 ns, carrier frequency 44,06 MHz)

Group delay ripple (p-p)

∆τ

40,06 ... 48,06 (40,00 ... 48,00) MHz

—

50

—

ns

Impedance at 44,06 MHz

Input:

=

||

—

2,0 ||17,0

—

k

Ω || pF

Output:

—

1,6 || 4,5

—k

Ω || pF

Temperature coefficient of frequency

—

–72

—

ppm/K