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3Jun 08, 2001
SAW Components X 6965 D
44,00 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
— (44,00) — MHz
(center between 3 dB points)
Insertion attenuation α
Reference level for the 44,06 (44,00) MHz 13,2 14,7 16,2 dB
following data
Pass bandwith
αrel ≤ 3dB
B
3dB
— 6,0 — MHz
αrel ≤ 30 dB
B
30dB
— 7,6 — MHz
Amplitude ripple ∆α
41,53 ... 46,59 MHz — 0,4 — dB
Relative attenuation αrel
41,53 (41,47) MHz — 0,3 — dB
46,59 (46,53) MHz — 0,4 — dB
41,06 (41,00) MHz 1,5 2,7 3,8 dB
47,06 (47,00) MHz 1,8 3,0 4,2 dB
47,31 (47,25) MHz — 8,3 — dB
39,81 (39,75) MHz 40,0 55,0 — dB
Lower sidelobe
35,06 ... 39,46 (35,00 ... 39,40) MHz 43,0 47,0 — dB
39,46 ... 40,06 (39,40 ... 40,00) MHz 38,0 47,0 — dB
Upper sidelobe
48,06 ... 50,06 (48,00 ... 50,00) MHz 37,0 42,0 — dB
50,06 ... 55,06 (50,00 ... 55,00) MHz 43,0 51,0 — 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 44,06 MHz)
Feedthrough signal suppression
1,3 µs ... 1,2 µs before main pulse 50,0 56,0 — dB
(test pulse 250 ns,
carrier frequency 44,06 MHz)
Group delay ripple (p-p) ∆τ
41,53 ... 46,59 MHz — 30 — ns
Impedance at 44,06 MHz
Input:
Z
IN =
R
IN ||
C
IN — 1,3 ||16,1 — kΩ || pF
Output:
Z
OUT =
R
OUT ||
C
OUT —1,1 || 5,6 —kΩ || pF
Temperature coefficient of frequency
TC
f— –72 — ppm/K