The reference level for the relative attenuation arel of TFS238 is the minimum of the pass band attenuation amin. This value is defined as the insertion loss
ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 1 dB filter attenuation level relative to the insertion loss
ae. The given values for the relative attenuation arel and the group delay ripple have to be reached at the frequencies given below, even if the centre
frequency fc is shifted due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance for the
centre frequency fc.
Data
Insertion loss
(reference level)
ae
typ. value
9,8 dB
tolerance / limit
max.
12
dB
Nominal frequency
Centre frequency
Relative attenuation
fN
fN
fN
fN
fN
.........
±
±
±
±
5
7,5
9
10
MHz
MHz
MHz
MHz
.........
.........
.........
.........
fN
fN
fN
fN
fN
±
fN
fc
arel
2,5 MHz
MHz
MHz
MHz
MHz
-
238,5 MHz
238,5 MHz
-
0,4 dB
23
38
50
60
dB
dB
dB
dB
max.
min.
min.
min.
min.
max.
1
13
23
40
47
4
-
dB
dB
dB
dB
dB
deg rms
±
7,5
±
9
± 10
± 100
Phase variation
within fN
±
2,5 MHz
Temperature coefficient of frequency
( Tc
f
)**
Operating temperature range
Storage temperature range
Input power level
1,1 deg rms
-18
-
-
-
ppm/K
- 20 °C .... + 85
- 40 °C .... + 85
max.
20
°C
°C
dBm
*)
The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as
reference values only. Should there be additional questions do not hesitate to ask for an application note or contact our design team.
**)
∆f(Hz)
= TCf(ppm/K) x (T-T
0
) x fcat(MHz).
generated:
checked / approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.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.
Filename: tfs 238.doc
Version 2.2
19.05.2006
VI
TELEFILTER
Filter characteristic
0
Filter specification
TFS 238
2/5
0
7.63
-7
-1
6.88
-14
-2
6.13
-21
-3
5.38
magnitude in dB
magnitude in dB
-28
-4
4.63
delay in µs
-35
-5
3.88
-42
-6
3.13
-49
-7
2.38
-56
-8
1.63
-63
-9
0.88
-70
223.92
226.836
229.752
232.668
235.584
238.5
241.416
frequency in MHz
244.332
247.248
250.164
253.08
-10
234.5
235.3
236.1
236.9
237.7
238.5
239.3
frequency in MHz
240.1
240.9
241.7
0.13
242.5
Construction and pin connection
(All dimensions in mm)
13,3 ±0,2
TFS 238
●
U18
1
1,0±0,2
5
1,8±0,2
Date code
1
2
3
4
5
6
7
8
9
10
Input
Ground
Ground
Ground
Output RF Return
Output
Ground
Ground
Ground
Input RF Return
6,5 ±0,2
10
1,91±0,2
7,62±0,2
6
50 Ohm Test circuit
1
10
C1
1,9±0,2
Date code:
U
2006
V
2007
W
2008
...
Year + week
L1
6
L2
SAW
2, 3, 4, 7, 8, 9
5
C2
Stability characteristics
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.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.
Filename: tfs 238.doc
Version 2.2
19.05.2006
VI
TELEFILTER
Filter specification
TFS 238
3/5
After the following tests the filter shall meet the whole specification:
1. Shock:
2. Vibration:
3. Change of
temperature:
4. Resistance to
solder heat (reflow):
500g, 18 ms, half sine wave, 3 shocks each plane;
DIN IEC 68 T2 - 27
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
-55 °C to 125°C / 30 min. each / 10 cycles
DIN IEC 68 part 2 – 14 Test N
reflow possible: twice max.;
for temperature conditions, please refer to the attached "Air reflow temperature conditions" on page 4;
Packing
Tape & Reel:
DIN 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:
reel of empty components at start:
reel of empty components at start including leader:
trailer
1700
min 300 mm
min 500 mm
min 300 mm
EMBOSSED CARRIER TAPE
Tape (all dim ensions in mm )
W
: 24
± 0,3
Po
:
4
± 0,1
Do
:
1,5 + 0,1
E
:
1,75 ± 0,1
F
:
11,5 ± 0,1
G (min) :
0,60
P2
:
2 ± 0,1
P1
:
12 ± 0,1
D1(min) : 1,5
Ao
:
7,1 ± 0,2
Bo
: 13,9 ± 0,2
Ct
: 21,5 ± 0,1
Do
P
o
P
2
E
A
o
D
1
F
W
Ct
B
o
G
P
1
COVER TAPE
W 2
Reel (all dimensions in mm):
A
:
330
24,40 +2,0
30,4
60
13
± 0,5/-0.2
A
W1
:
W2 (max) :
N (min)
C
:
:
C
N
W 1
The minimum bending radius is 45 mm. The mounting surface of the filters faces the bottom side of the embossed carrier tape.
Markings on the filters can be read if the upper side of the carrier tape is regarded with the sprocket holes on its
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.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.
Filename: tfs 238.doc
Version 2.2
19.05.2006
VI
TELEFILTER
Air reflow temperature conditions
Filter specification
TFS 238
4/5
Conditions
Average ramp-up rate (30°C to 217°C)
> 100°C
> 150°C
> 217°C
Peak temperature
Time within 5°C of actual peak temperature
Cool-down rate (Peak to 50°C)
Time from 30°C to Peak temperature
Exposure
less than 3°C/second
between 300 and 600 seconds
between 240 and 500 seconds
between 30 and 150 seconds
max. 260°C
between 10 and 30 seconds
less than 6°C/second
no greater than 300 seconds
Chip-mount air reflow profile
Temperature / °C
max. 260°C
217°C
max. 300 s
10 ... 30 s
30 ... 150 s
Time / s
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.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.
Filename: tfs 238.doc
Version 2.2
19.05.2006
VI
TELEFILTER
History
Version
1.0
1.1
1.2
1.3
2.0
2.1
2.2
Filter specification
TFS 238
5/5
Reason of Changes
generation of specification
changing package and relative attenuation
adding phase linearity over passband
changing package and packing
typical values, matching configuration and terminating impedances added
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