245.0
MHz SAW Filter
Project name
261806B
1. Features
Typical 1dB bandwidth of 18.5 MHz
High attenuation
Single Ended Operation
Dual In-line Package (DIP)
2. Electrical Specifications
Source and Load Impedance = 50
Room Temperature : +25℃
℃
Center Frequency (fo)
Insertion Loss
1dB Bandwidth
3dB Bandwidth
40dB Bandwidth
Amplitude Ripple (Fo±9.0075MHz)
Group Delay Variation (Fo±9.0075MHz)
Absolute Delay
Ultimate Rejection
Temperature Coefficient of Frequency
Substrate Material
Input Power : +10dBm
MHz
dB
MHz
MHz
MHz
dB
nsec
usec
dB
ppm/℃
-
Minimum
-
-
18.40
-
-
-
-
-
47
-
Typical
245.0
27.0
18.55
18.92
20.45
0.65
40
2.26
53
-18
112-LT
Maximum
-
28.5
-
-
20.60
1.2
100
-
-
-
D2012 Package Dimension
Matching Schematic
2.5±0.2
12.7±0.5
5.5max 6.0max
7.6±0.2
Input
50
Ω
L1
1
5
L2
Output
50
Ω
ITF 13A001
261806B
245-18.5M
C1
0.45±0.05
2.5±0.2
12.7±0.2
C2
20.3±0.5
L1 = L2 = 15nH, C1 = C2=30pF
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. 04.01
Rev 1.0
245.0
MHz SAW Filter
Project name
261806B
3. Typical Performance ( at +25℃ )
℃
1dB Bandwidth & Ripple
24 Sep 2012 22:40:22
CH1
CH2
S21
S21
LOG
LOG
1 dB/
1 dB/
REF -26.68 dB
REF -27.12 dB
1 : 0 . 0000
3 : - . 06230
dB
dB
0 . 000
18 . 015
000
000
MHz
MHz
CH1
S21
LOG
10 dB/
REF -26.91 dB
40B Bandwidth
24 Sep 2012 22:38:09
1 : 0 . 0000
dB
0 . 000
000
MHz
*
CH1 Markers
REF=1
18 . 541409
MHz
1
Cor
cent
:
244 . 926957
MHz
C
cent
Q: 13 . 210
1_ loss
1
: -26
. 925
dB
1_ loss
: -26
. 900
dB
2
Q: 11 . 974
:
244 . 907870
MHz
BW:
CH1 Markers
REF=1
20 . 452873
MHz
BW:
2
Hld
3
4
3
2
Cor
1
mean
CH2
: -26
Markers
REF=2
. 942
dB
dB
dB
3
4
s . dev
p-p
: . 09670
: . 43940
CENTER
245 . 000
000
MHz
SPAN
22 . 000
000
MHz
CENTER
245 . 000
000
MHz
SPAN
60 . 000
000
MHz
3dB Bandwidth & Group Delay
24 Sep 2012 22:40:43
CH1
CH2
S21
S21
LOG
DEL
1 dB/
50 ns/
REF -26.68 dB
REF 2.236 us
1 : 0 . 0000
3 : -11 . 757
dB
ns
0 . 000
18 . 015
000
000
MHz
MHz
CH1
CH2
S11
S22
1 U FS
1 U FS
Smith Chart
24 Sep 2012 22:42:11
1 : 46 . 924
2 : 45 . 795
23 . 150
21 . 029
15 . 039
13 . 661
nH
nH
245 . 000
245 . 000
000
000
MHz
MHz
BW:
Cor
cent
:
CH1 Markers
REF=1
18 . 926593
MHz
244 . 926262
MHz
Cor
Q: 12 . 941
1_ loss
1
: -26
. 880
dB
2
21
3
1
2
Smo
Cor
3
CH2
mean
s . dev
p-p
Markers
REF=2
4
: 2 . 2628
us
: 6 . 4743
: 33 . 222
ns
ns
Cor
CENTER
245 . 000
000
MHz
SPAN
22 . 000
000
MHz
CENTER
245 . 000
000
MHz
SPAN
60 . 000
000
MHz
Wide band Properties
24 Sep 2012 22:43:35
CH1
S21
LOG
10 dB/
REF -28.99 dB
1 : 0 . 0000
dB
0 . 000
000
MHz
CH1
CH2
S11
S22
SWR
SWR
1 /
1 /
SWR(S11 & S22)
24 Sep 2012 22:42:02
REF 1.613
REF 1.56
1 : 1 . 6136
2 : 1 . 5576
245 . 000
245 . 000
000
000
MHz
MHz
Markers
REF=1
2 : -52 . 152
dB
245 . 000
MHz
3 : -55 . 414
dB
490 . 000
MHz
CH1
Cor
1
1
Cor
2
2
3
START
. 010
000
MHz
STOP
800 . 000
000
MHz
CENTER
245 . 000
000
MHz
SPAN
60 . 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. 04.01
Rev 1.0
