X6855D datasheet(3/6 Pages) EPCOS

3 / 6 page

Jun 22, 2005

SAW Components

X 6855 D

44,00 MHz

Bandpass Filter

Data Sheet

Characteristics

Reference temperature:

TA = 25 (45) ˚C

Terminating source impedance:

ZS = 50 Ω

Terminating load impedance:

ZL = 2 kΩ || 3 pF

min.

typ.

max.

Center Frequency

—

44,00

—

(center between 3dB points)

Insertion attenuation

Reference level for the

44,06 (44,00) MHz

15,8

17,3

18,8

following data

Pass bandwidth

rel < 3 dB

B3dB

—

7,9

—

MHz

rel < 30 dB

B30dB

—

9,6

—

MHz

Relative attenuation

rel

40,53 (40,47) MHz

—

–0,2

—

47,59 (47,53) MHz

—

1,3

—

40,06 (40,00) MHz

1,2

2,4

—

48,06 (48,00) MHz

2,8

4,0

—

Lower sidelobe

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

40,0

46,0

—

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

—

(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

—

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

Group delay ripple (p-p)

∆τ

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

—

Impedance at 44,06 MHz

Input:

ZIN

RIN

CIN

—

2,0 ||17,0

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

1,6 || 4,5

—k

Ω || pF

Temperature coefficient of frequency

TCf

—

–72

—

ppm/K

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