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SHOULDER ELECTRONICS |
1.SCOPE
SHOULDER ’s SAW filter series have broad line up products meeting all
broadcast standard including NTSC,PAL and SECAM systems. These filters are
composed of two interdigital transducers on a single-crystal. piezoelectrical chip.
they are used in electronic equipments such as TV and so on.
2.Construction
2.1 Dimension and materials
Manufacturer’s name : SHOULDER ELECTRONICS LTD
Type : IF38B1M
2.2. Circuit construction, measurement circuit
1
3.Characteristics
Standard atmospheric conditions
Unless otherwise specified , the standard rang of atmospheric conditions for making
measurements and tests is as follows;
Ambient temperature : 15 to 35
Relative humidity : 25% to 85%
Air pressure
: 86kPa to 106kPa
Operating temperature rang
Operating temperature rang is the rang of ambient temperatures in which the filter
can be
operated continuously. -10 ~ +60
Storage temperature rang
Storage temperature rang is the rang of ambient temperatures at which the filter can
be stored
without damage.
Conditions are as specified elsewhere in these specifications. -40 ~ +70
Reference temperature
+25
3.1 Maximum Rating
DC voltage VDC 12 V
AC voltage Vpp
10 V
3.2 Electrical Characteristics
Source impedance
Zs=50
Load impedance
ZL=2k//3pF
Items
Freq Min
Insertion attenuation
Reference level
36.50MHz
14.5
38.00MHz
3.6
33.57MHz
-0.5
32.50MHz
14.5
Relative attenuation
31.50MHz
31.00MHz
17.5
37.0
30.00MHz
42.0
39.50MHz
42.0
40.50MHz
38.0
Sidelobe
25.00~30.00MHz
39.50~45.00MHz
Temperature coefficient
35.0
35.0
Between any terminals
Between any terminals
T A=25
typ max
16.5 18.5 dB
5.1 6.6 dB
1.0 2.5 dB
16.5 18.5 dB
19.5 - dB
47.0 dB
52.0 dB
50.0 dB
45.0 dB
47.0 dB
43.0 dB
-72 Ppm/k
2
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