255.0
MHz SAW Filter
Project name
262908B
1. Features
Typical 1dB bandwidth of 29.5 MHz
High attenuation
Single Ended Operation
Dual In-line Package (DIP)
2. Electrical Specifications
Source and Load Impedance = 50
Minimum
Typical
Maximum
-
-
29.40
-
-
-
-
-
50
-
-
255.0
29.5
29.53
29.85
31.25
0.65
35
2.68
53
-
-18
-
31.0
-
-
31.35
1.2
70
-
-
10
-
Operating Temperature : -10℃ ~ +60℃
℃
℃
Center Frequency (fo)
Insertion Loss
1dB Bandwidth
3dB Bandwidth
40dB Bandwidth
Amplitude Ripple (fo ± 14.22 MHz)
Group Delay Variation (fo ± 14.22 MHz)
Absolute Delay
Ultimate Rejection
Maximum input Power
Temperature Coefficient of Frequency
MHz
dB
MHz
MHz
MHz
dB
nsec
usec
dB
dBm
ppm/℃
℃
Room Temperature :
+
25℃
℃
Insertion Loss
Amplitude Ripple
(fo ± 14.38 MHz)
Group Delay Variation
(fo ± 14.38 MHz)
Minimum
dB
dB
nsec
-
-
-
Typical
29.5
0.65
35
Maximum
31.0
1.2
70
D2012 Package Dimension
Matching Schematic
12.7±0.5
5.5max 6.0max
7.6±0.2
2.5±0.2
Input
50
Ω
1
L1
5
L2
Output
50
Ω
ITF 13A001
262908B
255-29.5M
0.45±0.05
20.3±0.5
2.5±0.2
12.7±0.2
L1 = L2 = 12nH
Pin Configuration
Dimensions shown are nominal in millimeters
Base : Fe(SPCC), Au plating over Ni plated
Cap : Cu & Cr Alloy, Ni Plated
Termination : Kovar, Au Plated
Input
Output
1
5
Ground
Others
2,4
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
2013. 03. 27
Rev 1.0
255.0
MHz SAW Filter
Project name
262908B
3. Typical Performance ( at +25℃ )
℃
1dB Bandwidth & Ripple(Fo ± 14.38 MHz)
CH1
CH2
S21
S21
LOG
LOG
1 dB/
1 dB/
REF -28.7 dB
REF -29.27 dB
14 Mar 2012 11:28:21
1: 0. 0000 dB
0. 000 000 MHz
3: - . 19050 dB
28. 760 000 MHz
CH1
S21
LOG
10 dB/
40dB Bandwidth
REF -28.8 dB
14 Mar 2012 11:16:33
1: 0. 0000 dB
0. 000 000 MHz
BW
:
Cor
CH1 Markers
REF=1
29. 534043 MHz
MHz
*
BW
:
CH1 Markers
REF=1
31. 252740 MHz
MHz
cent : 255 . 074270
Cor
1
2
Q: 8. 6366
1_loss : -29 . 026 dB
1
2
cent : 255 . 063408
Q: 8. 1613
1_loss : -28 . 859 dB
3
3
2
Cor
4
CH2 Markers
REF=2
mean: -28 . 973 dB
s. dev : . 11720 dB
p-p : . 65050 dB
3
4
START 237 . 000 000 MHz
STOP 273 . 000 000 MHz
CENTER 255 . 000 000 MHz
SPAN 100 . 000 000 MHz
3dB Bandwidth & Group Delay(Fo ± 14.38 MHz)
CH1
CH2
S21
S21
LOG
DEL
1 dB/
50 ns/
REF -28.7 dB
REF 2.717 us
14 Mar 2012 11:28:43
1: 0. 0000 dB
0. 000 000 MHz
3: -1 . 5257 ns
28. 760 000 MHz
CH1
S21
LOG
10 dB/
50dB Bandwidth
REF -28.8 dB
14 Mar 2012 11:17:01
1: 0. 0000 dB
0. 000 000 MHz
BW
:
Cor
CH1 Markers
REF=1
29. 849129 MHz
MHz
*
BW
:
CH1 Markers
REF=1
31. 441154 MHz
MHz
cent : 255 . 071768
Cor
1
2
Q: 8. 5454
1_loss : -29 . 026 dB
1
2
cent : 255 . 075673
Q: 8. 1128
1_loss : -28 . 859 dB
3
Smo
Cor
3
2
CH2 Markers
REF=2
mean:42. 6852 us
s. dev : 5. 8595 ns
p-p : 30. 433 ns
3
4
CENTER 255 . 000 000 MHz
SPAN 36. 000 000 MHz
CENTER 255 . 000 000 MHz
SPAN 100 . 000 000 MHz
Wide band Properties
CH1
S21
LOG
10 dB/
REF -32.12 dB
14 Mar 2012 11:32:40
1: 0. 0000 dB
0. 000 000 MHz
CH1
CH2
S11
S22
SWR
SWR
10 /
10 /
SWR(S11 & S22)
REF 1.172
REF 1.372
14 Mar 2012 11:29:59
1: 1. 1752
255 . 000 000 MHz
2: 1. 3770
255 . 000 000 MHz
CH1 Markers
REF=1
2: -66 . 520 dB
255 . 000 MHz
3: -60 . 845 dB
510 . 000 MHz
Cor
1
1
Cor
2
3
START
. 010 000 MHz
2
STOP 800 . 000 000 MHz
CENTER 255 . 000 000 MHz
SPAN 100 . 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
2013. 03. 27
Rev 1.0
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