參數(shù)資料
型號(hào): B4818
英文描述: Surface Acoustic Wave Filter
中文描述: 表面聲波濾波器
文件頁數(shù): 2/5頁
文件大?。?/td> 391K
代理商: B4818
Preliminary format of data sheet
Terms of delivery and rights to change design reserved
Page 2 of 5
OFW E MF
Oct 28, 1998
SAW Components
Low Loss Filter
Data Sheet
B4818
246,00 MHz
Characteristics
Operating temperature:
Terminating source impedance:
Terminating load impedance:
T
Z
S
= 650
|| -2,6 pF
Z
L
= 650
|| -2,6 pF
= 25 C
1)
Temperature dependence of f
c
:
f
c
(T) = f
c
(T
0
)(1 + TC
f
(T – T
0
)
2
)
min.
typ.
246,00
max.
Nominal frequency
f
N
MHz
Minimum insertion attenuation
excluding losses in matching circuit
including losses in matching circuit
Amplitude ripple
(p-p)
f
N
- 85,0 kHz
f
N
- 120,0 kHz
Group delay ripple
(p-p)
f
N
- 70,0 kHz
f
N
- 120,0 kHz
Relative attenuation
(relative to
α
min
)
f
N
- 100,00 MHz ...
f
N
- 1,60 MHz
f
N
- 0,60 MHz
f
N
- 0,40 MHz
f
N
- 0,33 MHz
α
min
2,0
3,0
3,0
4,0
4,0
5,0
dB
dB
α
...
...
f
N
+ 93,0 kHz
f
N
+ 120,0 kHz
0,2
0,7
1,5
3,0
dB
dB
τ
...
...
f
N
+ 70,0 kHz
f
N
+ 120,0 kHz
0,4
0,9
1,2
2,0
μ
s
μ
s
α
rel
f
N
- 1,60 MHz
f
N
- 0,60 MHz
f
N
- 0,40 MHz
f
N
- 0,33 MHz
f
N
- 0,30 MHz
55
42
25
18
10
69
46
50
29
20
dB
dB
dB
dB
dB
...
...
...
...
f
N
+ 0,30 MHz
f
N
+ 0,33 MHz
f
N
+ 0,40 MHz
f
N
+ 0,60 MHz
f
N
+ 0,80 MHz
f
N
+ 3,00 MHz
...
...
...
...
...
...
f
N
+ 0,33 MHz
f
N
+ 0,40 MHz
f
N
+ 0,60 MHz
f
N
+ 0,80 MHz
f
N
+ 3,00 MHz
f
N
+ 100,00 MHz
10
18
25
38
42
55
20
26
30
43
44
68
dB
dB
dB
dB
dB
dB
Impedance
at f
N
Input:
Output: Z
OUT
= R
OUT
|| C
OUT
Z
IN
= R
IN
|| C
IN
650 || 2,6
650 || 2,6
|| pF
|| pF
ppm/K
2
Temperature coefficient of frequency
1)
Turnover temperature
TC
f
T
0
– 0,036
20
C
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