SAW Bandpass Filter F8685
Features
RF bandpass filter
High attenuation
Usable bandwidth 4MHz
No matching 50Ω single-ended operation
Ceramic Surface Mounted Device (SMD) Package
3.80±0.15
1.00±0.15
0.44
1.90±0.15
1
6
6
0.44
1
2
ITF
8685
3.80±0.15
5
5
2
1.40±0.15
3
4
4
3
1.27±0.05
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
5
1, 3, 4, 6
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.
0.64±0.05
Package Dimensions
F8685
2004-10-25
NS3023-AS02
1/7
SAW Bandpass Filter F8685
Specifications
Fc = 868.0MHz
Terminating source impedance
Terminating load impedance
: 50Ω
: 50Ω
Minimum
Center Frequency ( Fc )
Insertion Loss (Fc +/- 2.0 MHz)
Amplitude Ripple (Fc +/- 2.0 MHz)
Absolute Group Delay at Fc
Group Delay Variation (Fc +/- 2.0 MHz)
VSWR (Fc +/- 2.0 MHz)
Relative Attenuation
…
~ Fc - 20 MHz
Fc + 30 MHz ~ …
Temperature Coefficient of Frequency
MHz
dB
dB
nsec
nsec
-
-
-
-
-
-
Typical
868.0
4.0
1.0
100
50
1.5
Maximum
-
4.5
2.0
-
-
2.0
dB
45
45
-
50
50
-32
-
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.
F8685
2004-10-25
NS3023-AS02
2/7
SAW Bandpass Filter F8685
Matching Schematic
( Actual matching values may vary due to PCB layout and parasitics )
Input
50
Ω
Output
50
Ω
Marking Configuration
ITF
1)
8685
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.
F8685
2004-10-25
NS3023-AS02
3/7
SAW Bandpass Filter F8685
Typical Performance ( at 25℃ )
16 Apr 2004 03:25:42
2: - . 38850 dB
4. 000 000 MHz
CH1
S21
LOG
10 dB/
REF 0 dB
2
1
PRm
CH1 Markers
Cor
mean : -3 . 9882 dB
s. dev : . 16000 dB
p-p : . 39650 dB
REF=1
CENTER 868 . 000 000 MHz
SPAN 200 . 000 000 MHz
CH1
S21
LOG
10 dB/
REF 0 dB
1
16 Apr 2004 03:28:32
1: -5 . 0408 dB
868 . 000 000 MHz
PRm
C
START
. 030 000 MHz
STOP 2 000 . 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.
F8685
2004-10-25
NS3023-AS02
4/7
SAW Bandpass Filter F8685
Input / Output VSWR Charts
CH1
S11
SWR
1 /
REF 1
16 Apr 2004 03:26:44
1: 1. 7632
868 . 000 000 MHz
CH1
S22
SWR
1 /
REF 1
16 Apr 2004 03:26:57
1: 1. 6692
868 . 000 000 MHz
PRm
PRm
Cor
Cor
1
1
CENTER 868 . 000 000 MHz
SPAN 200 . 000 000 MHz
CENTER 868 . 000 000 MHz
SPAN 200 . 000 000 MHz
Input / Output Smith Charts
CH1
S11
1 U FS
1: 30. 621
11. 337
16 Apr 2004 03:26:18
2. 0787 nH
868 . 000 000 MHz
CH1
S22
1 U FS
1: 31. 312
8. 3574
16 Apr 2004 03:26:30
1. 5324 nH
868 . 000 000 MHz
PRm
PRm
Cor
Cor
1
1
CENTER 868 . 000 000 MHz
SPAN 200 . 000 000 MHz
CENTER 868 . 000 000 MHz
SPAN 200 . 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.
F8685
2004-10-25
NS3023-AS02
5/7
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