4

Jan 27, 2003

SAW Components

K 7253 M

38,00 MHz

IF Filter for Intercarrier / Multistandard Applications

Data Sheet

Characteristics in M/N mode (switching pin 2 connected to pin 1)

Reference temperature:

25 ˚C

Terminating source impedance:

Terminating load impedance:

min.

typ.

max.

Insertion attenuation

α

Reference level for the

36,50 MHz

15,5

17,0

18,5

dB

following data

Relative attenuation

α

rel

Picture carrier

38,00 MHz

5,2

6,2

7,2

dB

Color carrier

34,42 MHz

2,8

3,8

4,8

dB

Sound carrier

33,50 MHz

18,3

19,8

21,3

dB

Adjacent picture carrier

32,00 MHz

38,0

46,0

—

dB

Adjacent sound carrier

39,50 MHz

36,0

43,0

—

dB

Lower sidelobe

25,00 ..... 32,00 MHz

36,0

42,0

—

dB

Upper sidelobe

39,50 ..... 45,00 MHz

31,0

37,0

—

dB

Reflected wave signal suppression

1,2

µs ... 6,0 µs after main pulse

42,0

51,0

—

dB

(test pulse 250 ns,

carrier frequency 36,50 MHz)

Feedthrough signal suppression

1,2

µs ... 1,1 µs before main pulse

50,0

56,0

—

dB

(test pulse 250 ns,

carrier frequency 36,50 MHz)

Group delay predistortion

∆τ

(reference frequency 38,00 MHz)

34,42 MHz

—

–50

—

ns

Impedance at 36,50 MHz

Input:

=

||

—

1,2 ||18,9

—

k

Ω || pF

Output:

—

2,5 || 3,9

—k

Ω || pF

Temperature coefficient of frequency

—

–72

—

ppm/K