125.0 MHz SAW Filter
Part Number 251670B
1. Features
Typical 1dB bandwidth of 16.65MHz
High attenuation
Single Ended Operation
SMD Package
2. Electrical Specifications
Source and Load Impedance = 50
Operating Temperature : -30℃ ~ +80℃
℃
℃
Center Frequency (fo)
Insertion Loss
1 dB Bandwidth
3dB Bandwidth
40dB Bandwidth
Amplitude Ripple (fo ± 7.5 MHz)
Group Delay Variation (fo ± 7.5 MHz)
Absolute Delay
Ultimate Rejection
Temperature Coefficient of Frequency
MHz
dB
MHz
MHz
MHz
dB
nsec
usec
dB
ppm/℃
℃
Minimum
-
-
16.4
-
-
-
-
-
50
Typical
125.0
21.5
16.65
17.0
18.6
0.65
40
1.76
55
-72
Maximum
-
24.0
-
-
18.8
1.0
100
-
-
Room Temperature : +25℃
℃
Insertion Loss
Amplitude Ripple (fo ± 8.0 MHz)
Group Delay Variation (fo ± 8.0 MHz)
dB
dB
nsec
Minimum
-
-
-
Typical
21.5
0.65
40
Maximum
24.0
1.0
100
S2098 Package Dimension
20.00±0.2
2.30±0.1
7.62±0.1
Matching Schematic
6
7
8
9
10
10
9
8
7
6
56nH
10
5
39nH
30pF
Output
50
Ω
ITF 11A001
251670B
125-16.6MHz
1
2
3
4
5
1.02±0.1
9.80±0.2
Input
50
Ω
33pF
5
4
3
2
1
1.91±0.1
1.56±0.2
Dimensions shown are nominal in millimeters
Body : Al
2
O
3
Lid : Kovar, Ni Plated
Termination : Au plating 0.3 ~ 1.0um, over a 1.27 ~ 8.89um Ni Plating
Pin Configuration
Input
Output
10
5
Ground
Others
1,4
Ground
I T F Co., Ltd.
102-901, Bucheon Technopark 364, Samjeong-Dong,
Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Tel: 82-32-621-1213
Fax: 82-32-621-1218
http://www.itf.co.kr
sales@itf.co.kr
2011. 11. 05
Rev 1.0
125.0 MHz SAW Filter
Part Number 251670B
3. Typical Performance ( at +25℃ )
℃
1dB Bandwidth & Ripple
CH1 S21
CH2 S21
LOG
LOG
1 dB/
1 dB/
REF -21.08 dB
REF -21.67 dB
8 Apr 2011 14:52:25
1: 0. 0000 dB
0. 000 000 MHz
3: . 19400 dB
16. 000 000 MHz
CH1 S21
LOG
10 dB/
40dB Bandwidth
REF -21.33 dB
8 Apr 2011 14:51:08
1: 0. 0000 dB
0. 000 000 MHz
CH1 Markers
REF=1
BW 16. 651844 MHz
:
Cor
cent : 125. 068311 MHz
Q 7. 5108
:
1_loss : -21 . 484 dB
1
2
Cor
1
2
CH1 Markers
REF=1
BW 18. 615247 MHz
:
cent : 125. 051462 MHz
Q 6. 7177
:
1_loss : -21 . 571 dB
3
3
4
2
Cor
CH2 Markers
REF=2
mean: -21 . 363 dB
s. dev : . 13550 dB
p-p : . 65380 dB
3
4
CENTER 125. 000 000 MHz
SPAN 20. 000 000 MHz
CENTER 125. 000 000 MHz
SPAN 65. 000 000 MHz
3dB Bandwidth & Group Delay
CH1 S21
CH2 S21
LOG
DEL
1 dB/
100 ns/
REF -21.08 dB
REF 1.751 us
8 Apr 2011 14:52:36
1: 0. 0000 dB
0. 000 000 MHz
3: 7. 7057 ns
16. 000 000 MHz
CH1 S21
LOG
10 dB/
50dB Bandwidth
REF -21.33 dB
8 Apr 2011 14:51:14
1: 0. 0000 dB
0. 000 000 MHz
CH1 Markers
REF=1
BW 17. 007700 MHz
:
Cor
cent : 125. 067624 MHz
Q 7. 3536
:
1_loss : -21 . 484 dB
1
2
Cor
1
2
CH1 Markers
REF=1
BW 18. 780327 MHz
:
cent : 125. 052410 MHz
Q 6. 6587
:
1_loss : -21 . 571 dB
3
Smo
Cor
2
3
CH2 Markers
REF=2
mean: 1. 7663 us
4
s. dev : 8. 3288 ns
p-p : 41. 122 ns
3
4
CENTER 125. 000 000 MHz
SPAN 20. 000 000 MHz
CENTER 125. 000 000 MHz
SPAN 65. 000 000 MHz
Smith chart (S11 & S22)
CH1 S11
CH2 S22
*
1 U FS
1 U FS
1: 14. 428
2: 7. 9373
5. 1421
-3 . 4146
8 Apr 2011 14:53:40
6. 5471 nH
125. 000 000 MHz
372. 89 pF
125. 000 000 MHz
CH1 S11
CH2 S22
*
SWR
SWR
5 /
5 /
SWR(S11 & S22)
REF 3.505
REF 6.33
8 Apr 2011 14:53:34
1: 3. 5054
125. 000 000 MHz
2: 6. 3296
125. 000 000 MHz
Cor
Cor
1
1
2
Cor
Cor
2
CENTER 125. 000 000 MHz
SPAN 65. 000 000 MHz
CENTER 125. 000 000 MHz
SPAN 65. 000 000 MHz
I T F Co., Ltd.
102-901, Bucheon Technopark 364, Samjeong-Dong,
Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Tel: 82-32-621-1213
Fax: 82-32-621-1218
http://www.itf.co.kr
sales@itf.co.kr
2011. 11. 05
Rev 1.0
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