3

Dec 08, 2003

SAW Components

X 6864 D

43,75 MHz

Bandpass Filter

Data Sheet

Characteristics

Reference temperature:

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Center frequency

—

(43,75)

—

MHz

(center between 10 dB points)

Insertion attenuation

α

Reference level for the

43,81 (43,75) MHz

13,7

15,2

16,7

dB

following data

Pass bandwith

α

—

6,2

—

MHz

α

—

7,6

—

MHz

Relative attenuation

α

rel

40,71 (40,65) MHz

—

3,0

—

dB

46,91 (46,85) MHz

—

2,2

—

dB

Lower sidelobe

35,06 ... 39,06 (35,00 ... 39,00) MHz

40,0

46,0

—

dB

39,06 ... 39,76 (39,00 ... 39,70) MHz

38,0

45,0

—

dB

Upper sidelobe

47,86 ... 49,66 (47,80 ... 49,60) MHz

38,0

44,0

—

dB

49,66 ... 55,06 (49,60 ... 55,00) MHz

41,0

47,0

—

dB

Reflected wave signal suppression

1,3

µs ... 6,0 µs after main pulse

42,0

52,0

—

dB

(test pulse 250 ns,

carrier frequency 43,81 MHz)

Feedthrough signal suppression

1,3

µs ... 1,2 µs before main pulse

50,0

56,0

—

dB

(test pulse 250 ns,

carrier frequency 43,81 MHz)

Group delay ripple (p-p)

∆τ

Aperture 50 kHz

40,71 ... 46,91 (40,65 ... 46,85) MHz

—

40

—

ns

Impedance at 43,81 MHz

Input:

=

||

—

1,3 || 16,1

—

k

Ω || pF

Output:

—

1,1 || 5,5

—k

Ω || pF

Temperature coefficient of frequency

—

–72

—

ppm/K