SAW Bandpass Filter F3256
Features
RF bandpass filter
High attenuation
Usable bandwidth 6.6MHz
No matching 50Ω single-ended operation
Ceramic Surface Mounted Device (SMD) Package
2.08±0.15
Package Dimensions
5.00±0.15
8
1.2±0.15
8
5.00±0.15
1
2
3
ITF
3256
4
7
6
5
7
6
5
1
2
3
1.35±0.15
1.27±0.05
4
Dimensions shown are nominal in millimeters
Body : Al
2
O
3
Ceramic
Lid : Kovar, Ni Plated
Terminations : Au plating 0.3 ~ 1.0 um, Over a 1.27 ~ 8.89 um
Ni Plating
Pin Configuration
2
6
1, 3, 4, 5, 7, 8
Input
Output
Case ground
Maximum Ratings
Parameter
Operating Temperature Range
Storage Temperature Range
Power Handling Capability
Electrostatics Sensitive Device (ESD)
Unit
°C
°C
dBm
Minimum
-10
-40
-
Typical
25
-
-
Maximum
60
85
-
I T F Co., Ltd.
102-901, Bucheon Technopark 364,
Samjeong-Dong, Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Part No.
Rev. Date
Rev.
0.6±0.15
F3256
2004-04-12
NS3002-AS01
1/7
SAW Bandpass Filter F3256
Specifications
Fc = 325.3MHz
Terminating source impedance
Terminating load impedance
: 50Ω
: 50Ω
Minimum
Center Frequency ( Fc )
Insertion Loss (Fc +/- 3.3 MHz)
Amplitude Ripple (Fc +/- 3.3 MHz)
Absolute Group Delay at Fc
Group Delay Variation (Fc +/- 3.3 MHz)
VSWR (Fc +/- 3.3 MHz)
Relative Attenuation
…
~ Fc - 40 MHz
Fc + 40 MHz ~ …
Temperature Coefficient of Frequency
MHz
dB
dB
nsec
nsec
-
-
-
-
-
-
Typical
325.3
3.0
1.0
80
50
1.5
Maximum
-
3.5
2.0
-
-
2.0
dB
50
50
-
55
55
-80
-
ppm/°C
-
Notes :
1) All specifications are based on the matching schematic shown below, measured by Agilent Network analyzer and
full 2 port calibration.
2) Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing
tolerances
3) All attenuation measurements are measured relative to insertion loss
I T F Co., Ltd.
102-901, Bucheon Technopark 364,
Samjeong-Dong, Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Part No.
Rev. Date
Rev.
F3256
2004-04-12
NS3002-AS01
2/7
SAW Bandpass Filter F3256
Matching Schematic
( Actual matching values may vary due to PCB layout and parasitics )
Input
50
Ω
Output
50
Ω
Marking Configuration
ITF
1)
3256
2)
1) Manufacturer name
2) Marking Number
* Ink or Laser Marking available
I T F Co., Ltd.
102-901, Bucheon Technopark 364,
Samjeong-Dong, Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Part No.
Rev. Date
Rev.
F3256
2004-04-12
NS3002-AS01
3/7
SAW Bandpass Filter F3256
Typical Performance ( at 25℃ )
6 Apr 2004 21:51:37
2: . 85200 dB
6. 600 000 MHz
CH1
S21
LOG
10 dB/
REF 0 dB
1
2
PRm
CH1 Markers
Cor
mean : -2 . 5482 dB
s. dev : . 28090 dB
p-p : . 86610 dB
REF=1
CENTER 325 . 300 000 MHz
SPAN 100 . 000 000 MHz
CH1
S21
LOG
10 dB/
REF 0 dB
1
3 Apr 2004 11:05:42
1: -2 . 6739 dB
325 . 300 000 MHz
C
START
. 030 000 MHz
STOP 1 000 . 000 000 MHz
I T F Co., Ltd.
102-901, Bucheon Technopark 364,
Samjeong-Dong, Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Part No.
Rev. Date
Rev.
F3256
2004-04-12
NS3002-AS01
4/7
SAW Bandpass Filter F3256
Input / Output VSWR Charts
CH1
S11
SWR
1 /
REF 1
3 Apr 2004 11:01:04
1: 1. 5016
325 . 300 000 MHz
CH1
S22
SWR
1 /
REF 1
3 Apr 2004 11:01:13
1: 1. 5130
325 . 300 000 MHz
Cor
Cor
1
1
CENTER 325 . 300 000 MHz
SPAN 100 . 000 000 MHz
CENTER 325 . 300 000 MHz
SPAN 100 . 000 000 MHz
Input / Output Smith Charts
CH1
S11
1 U FS
1: 34. 922
-8 . 0664
3 Apr 2004 11:00:43
60. 654 pF
325 . 300 000 MHz
CH1
S22
1 U FS
1: 34. 375
-7 . 4707
3 Apr 2004 11:00:53
65. 490 pF
325 . 300 000 MHz
Cor
Cor
1
1
CENTER 325 . 300 000 MHz
SPAN 100 . 000 000 MHz
CENTER 325 . 300 000 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
Part No.
Rev. Date
Rev.
F3256
2004-04-12
NS3002-AS01
5/7
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