X6875D datasheet(3/6 Pages) EPCOS

3 / 6 page

Jun 04, 2004

SAW Components

X 6875 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)

—

MHz

(center between 3 dB points)

Insertion attenuation

Reference level for the

44,06 (44,00) MHz

13,3

14,8

16,3

following data

Pass bandwith

rel ≤3dB

B3dB

—

6,0

—

MHz

rel ≤30 dB

B30dB

—

7,9

—

MHz

Amplitude ripple

∆α

41,53 ... 46,59 (41,47 ... 46,53 ) MHz

—

0,5

—

Relative attenuation

rel

41,53 (41,47) MHz

—

0,3

—

46,59 (46,53) MHz

—

0,3

—

41,06 (41,00) MHz

1,6

2,8

4,0

47,06 (47,00) MHz

2,0

3,2

4,4

47,31 (47,25) MHz

—

6,7

—

39,81 (39,75) MHz

39,0

49,0

—

Lower sidelobe

35,06 ... 38,81 (35,00 ... 38,75) MHz

44,0

50,0

—

38,81 ... 39,81 (38,75 ... 39,75) MHz

38,0

46,0

—

Upper sidelobe

48,31 ... 50,31 (48,25 ... 50,25) MHz

37,0

47,0

—

50,31 ... 55,06 (50,25 ... 55,00) MHz

43,0

53,0

—

Reflected wave signal suppression

1,1

µs ... 6,0 µs after main pulse

42,0

52,0

—

(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

41,53 ... 46,59 (41,47 ... 46,53 ) MHz

—

Impedance at 44,06 MHz

Input:

ZIN

RIN

CIN

—

1,6 ||14,3

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

1,6 || 4,3

—k

Ω || pF

Temperature coefficient of frequency

TCf

—

–72

—

ppm/K

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