Tfs235.doc
version 1.3
12.10.2000
VI
TELEFILTER
Filter Specification
TFS 235
1/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
Measurement condition
Ambient temperature:
23
°
C
Input power level:
0 dBm
Terminating impedances
for input:
770 Ohm // -1.9 pF
for output:
770 Ohm // -1.9 pF
Coupling coil:
145 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 235 is the insertion loss. The insertion loss ae is defined as the insertion loss at the
nominal frequency f
N
. The centre frequency f
C
is the arithmetic mean value of the upper and lower frequencies at the 3 dB filter attenuation level
relative to the insertion loss ae. The nominal frequency f
N
is fixed on 235,6 MHz without tolerance. The specified values have to be reached in
operating temperature range.
D a t a
typ. value
tolerance/limit
Insertion loss
ae
2,7
dB*
2,1 ... 4,1
dB
(Reference level)
Nominal frequency
f
N
-
235,600 MHz
Centre frequency
f
C
236,612
-
1 dB bandwidth
BW
255
kHz
-
Relative attenuation
arel
f
N
± 1,8 MHz ... f
N
± 6
MHz
42
min.
30
dB
f
N
± 6 MHz ... f
N
± 100 MHz
27...80
dB
min.
20
dB
VSWR
@ f
N
1,3:1
min. 1.8 : 1
Group delay
GD
@ f
N
2,85
µs
max.
5
µs
Input power
-
max.
10
dBm
Operating temperature range
- 5
°
C ... + 80
°
C
Storage temperature range
- 30
°
C ... + 80
°
C
Temperature coefficient of frequency TC
- 0.036
ppm/K²
Frequency inversion temperature
30
°C
* at ambient temperature
Generated:
Checked / approved:
Tfs235.doc
version 1.3
12.10.2000
VI
TELEFILTER
Filter Specification
TFS 235
2/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
Construction, pin configuration and 50
- matching network
(All dimensions in mm)
50 Ohm Test circuit
S 235
M41
Datecode:
Year+week
K
1998
L
1999
M
2000
...
1 Output
2
Output RF-Return
3
Ground
4
Coupling Coil
5
Ground
6
Ground
7
Input
8
Input RF-Return
9
Ground
10
Ground
11
Ground
12
Ground
1
7
3, 5, 6, 9, 10, 11, 12
50 Ohm
50 Ohm
SAW
C1
L1
C2
L2
4
2
8
L3
Tfs235.doc
version 1.3
12.10.2000
VI
TELEFILTER
Filter Specification
TFS 235
3/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
Stability Characteristics
After the following tests the filter shall meet the whole specification:
1. Shock:
500g, 18 ms, half sine wave, 3 shocks each plane;
DIN IEC 68 T2 - 27
2. Vibration:
10 Hz to 500 Hz, 0,35 mm or 5g respectively, 1 octave per min, 10 cycles per plan, 3 plans;
DIN IEC 68 T2 - 6
3. Damp heat:
25 °C to 55°C / 95% r.H. / 10 cycles
(cycle)
DIN IEC 68 - 2 30 Db
4. Resistance to
solder heat (reflow):
max. 2 times reflow process;
for temperature conditions refer to the attached "Air reflow temperature conditions" on page 4;
Packing
Tape & Reel:
IEC 286 - 3, with exception of value for N and minimum bending radius;
tape type
II
,
embossed carrier tape with top cover tape on the upper side;
max. pieces of filters per reel:
2000
Real of empty components at start:
min 300 mm
Real of empty components at start including leader:
min 500 mm
Trailer
min 300 mm
Do
P
o
E
F
W
P
1
EMBOSSED CARRIER TAPE
COVER TAPE
G
P
2
B
o
A
o
CT
D
1
Tape (all dimensions in mm)
W : 16 ± 0,3
Po : 4 ± 0,1
Do : 1,5 + 0,1
E : 1,75 ± 0,1
F : 7,5 ± 0,1
G (min) : 0,6
P2 : 2 ± 0,1
P1 : 8 ± 0,1
D1(min) : 1,5
Ao : 5,5 ± 0,1
Bo : 7,5 ± 0,1
CT : 13,5 + 0,1
A
C
N
W
1
W 2
Reel (all dimensions in mm):
A : 330
W1 : 16,4 +2
W2 (max) : 22,4
N (min) : 50
C : 13 +0,5 / -0,2
The minimum bending radius is 45 mm. The mounting surface of the filters faces the bottom side of the embossed carrier tape.
The marking of the filters is able to read if the view is directed on the upper side of the carrier tape with the sprocket holes on
the right side of the tape.
Tfs235.doc
version 1.3
12.10.2000
VI
TELEFILTER
Filter Specification
TFS 235
4/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
Air reflow temperature conditions
1st and 2nd air reflow profile
Name: pre-heating periods main-heating periods peak temperature
Temperature:
150 °C - 170 °C
over 200 °C
255 °C ± 5 °C
Time:
60 sec. - 90 sec.
20 sec. - 25 sec.
Chip-mount air reflow profile
time / sec.
temperature / °C
0
20
40
60
80
100
120
140
160
180
200
220
240
260
0
20
40
60
80
100
120
140
160
180
200
220
240
Table for temperature vs. time during the air reflow process
Tolerance of temperatures: ± 5 °C
time / sec. temperature / °C time / sec. temperature / °C
0
23
140
160
10
34
150
161
20
46
160
164
30
60
170
170
40
80
180
180
50
103
190
205
60
121
195
230
70
134
200
255
80
143
205
230
90
150
210
205
100
154
215
180
110
156
220
165
120
158
230
140
130
159
240
120
Tfs235.doc
version 1.3
12.10.2000
VI
TELEFILTER
Filter Specification
TFS 235
5/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
History
Version
Reason of Changes
Name
Date
1.0
generated according to customer requirement
Dr. Sabah
27.06.00
1.1
remove pass band width related values
Dr. Wall
28.07.2000
change position of input and output pin
add coupling coil
1.2
add values for termination impedances and coupling coil
Dr. Wall
11.10.2000
correct tape and real information
add matching network scheme
add typical value for 1 dB bandwidth
add group delay values
change marking from TFS235 to S235
1.3
add typical filter data
Dr. Wall
12.10.2000
define limits for insertion loss
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