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参数资料
| 型号： | B4822 |
| 英文描述： | Surface Acoustic Wave Filter |
| 中文描述： | 表面声波滤波器 |
| 文件页数： | 2/4页 |
| 文件大小： | 395K |
| 代理商： | B4822 |
Preliminary format of data sheet
Terms of delivery and rights to change design reserved
Page 2 of 4
OFW EM EU
Aug. 7, 1998
SAW Components
Low Loss Filter
Data Sheet
Characteristics
Operating temperature:
Terminating source impedance:
Terminating load impedance:
B4822
225,01 MHz
T
Z
S
= 650
|| -2,1 pF
Z
L
= 650
|| -2,1 pF
= 25 C
1)
Temperature dependence of f
c
:
f
c
(T) = f
c
(T
0
)(1 + TC
f
(T – T
0
)
2
)
Test matching network to 50
(element values depend on PCB layout):
min.
—
typ.
225,01
max.
—
Nominal frequency
Minimum insertion attenuation
(including losses in matching circuit)
(excluding losses in matching circuit)
Amplitude ripple
(p-p)
f
N
- 67,5 kHz
f
N
- 85,0 kHz
Group delay ripple
(p-p)
f
N
- 50,0 kHz
f
N
- 85,0 kHz
Relative attenuation
(relative to
α
min
)
f
N
- 25,00 MHz ...
f
N
- 3,00 MHz
f
N
- 1,60 MHz
f
N
- 0,60 MHz
f
N
- 0,40 MHz
f
N
MHz
α
min
3,0
2,0
4,1
3,2
5,5
4,5
dB
dB
α
...
...
f
N
+ 67,5 kHz
f
N
+ 80,0 kHz
—
—
0,5
0,8
2,0
3,0
dB
dB
τ
...
...
f
N
+ 50,0 kHz
f
N
+ 80,0 kHz
—
—
0,4
0,8
1,2
2,0
μ
s
μ
s
α
rel
f
N
- 3,00 MHz
f
N
- 1,60 MHz
f
N
- 0,60 MHz
f
N
- 0,40 MHz
f
N
- 0,20 MHz
50
48
38
28
65
55
47
49
15
—
—
—
—
—
dB
dB
dB
dB
dB
...
...
...
...
8
f
N
+ 0,20 MHz
f
N
+ 0,40 MHz
f
N
+ 0,60 MHz
f
N
+ 1,60 MHz
f
N
+ 3,00 MHz
...
...
...
...
...
f
N
+ 0,40 MHz
f
N
+ 0,60 MHz
f
N
+ 1,60 MHz
f
N
+ 3,00 MHz
f
N
+ 25,00 MHz
8
15
34
44
53
65
—
—
—
—
—
dB
dB
dB
dB
dB
28
38
48
50
Impedance
at f
N
Input:
Output: Z
OUT
= R
OUT
|| C
OUT
Z
IN
= R
IN
|| C
IN
—
—
—
650 || 2,1
650 || 2,1
– 0,036
—
—
—
|| pF
|| pF
ppm/K
2
Temperature coefficient of frequency
1)
Frequency inversion point
TC
f
T
0
—
25
—
C
C
p1
= 8,2 pF
L
s2
=
L
s3
=
C
p4
= 8,2 pF
L
c
= 120 nH
82 nH
82 nH
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