X7550D datasheet(3/8 Pages) EPCOS

3 / 8 page

July 17, 2006

X 7550 D

44.00 MHz

SAW Components

SAW bandpass Filter

Data sheet

Please read

cautions and warnings and

important notes at the end of this document.

Characteristics

Reference temperature:

TA = 25 (45) ˚C

Terminating source impedance:

ZS = 50 Ω and matching network

Terminating load impedance:

ZL = 2 kΩ || 3 pF and matching network

min.

typ.

@ 25 ˚C

max.

Insertion attenuation

Reference level for

44.06(44.00) MHz

5.0

7.0

9.0

the following data

Amplitude ripple (p-p)

∆α

41.66 ... 46.46

(41.60 ... 46.40) MHz

—

1.5

—

Pass bandwidth

rel < 3 dB

B3dB

—

5.7

—

MHz

Relative attenuation

rel

39.81 (39.75) MHz

32.0

41.0

—

41.26 (41.20) MHz

—

2.1

—

46.86 (46.80) MHz

—

0.4

—

47.31 (47.25) MHz

20.0

27.0

—

Lower sidelobe

35.06 ... 40.41

(35.00 ... 40.35) MHz

32.0

38.0

—

Upper sidelobe

47.71 ... 55.06

(47.65 ... 55.00) MHz

27.0

33.0

—

Reflected wave signal suppression

1.3

µs ... 6.0 µs after main pulse

24.0

34.0

—

(test pulse 250 ns,

carrier frequency 44.06 MHz)

Group delay ripple (p-p)

∆t

41.66 ... 46.46

(41.60 ... 46.40) MHz

—

190

—

Impedance at 44.06 MHz

Input:

ZIN

=RIN

CIN

—

1.0 || 21.7

—

Ω || pF

Output: ZOUT =ROUT ||COUT

—

8.0 || 3.6

—k

Ω || pF

Temperature coefficient of frequency

TCf

—

–72

—

ppm/K

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