3Mar 31, 2006
SAW Components X 6964 M
43,75 MHzBandpass Filter
Data Sheet
Characteristics
Reference temperature:
T
A= 25 (45) ˚C
Terminating source impedance:
Z
S= 50 Ω
Terminating load impedance:
Z
L= 2 kΩ || 3 pF
min. typ. max.
Center frequency
f
C
— 43,75 — MHz
(center between 3 dB points)
Insertion attenuation α
Reference level for the 43,81 (43,75) MHz 13,3 14,8 16,3 dB
following data
Pass bandwith
αrel ≤3dB
B
3dB — 6,0 — MHz
αrel ≤30 dB
B
30dB — 7,6 — MHz
Relative attenuation αrel
41,28 (41,22) MHz –0,8 0,2 1,2 dB
46,34 (46,28) MHz –0,7 0,3 1,3 dB
40,81 (40,75) MHz 1,3 2,5 3,7 dB
46,81 (46,75) MHz 1,6 2,8 4,0 dB
40,31 (40,25) MHz 9,0 12,0 — dB
47,31 (47,25) MHz 9,0 13,0 — dB
39,81 (39,75) MHz 38,0 50,0 — dB
47,81 (47,75) MHz 38,0 52,0 — dB
Lower sidelobe
35,06 ... 39,81 (35,00 ... 39,75) MHz 38,0 46,0 — dB
Upper sidelobe
47,81 ... 55,06 (47,75 ... 55,00) MHz 38,0 44,0 — 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
40,81 ... 46,81 (40,75 ... 46,75) MHz — 40 — ns
Impedance at 43,81 MHz
Input:
Z
IN =
R
IN ||
C
IN — 1,1 ||16,4 — kΩ || pF
Output:
Z
OUT =
R
OUT ||
C
OUT —1,1 || 5,0 —kΩ || pF
Temperature coefficient of frequency
TC
f— –72 — ppm/K