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HAODA ELECTRONICS |
1.SCOPE
HAODA’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 : HAODA ELECTRONICS Co. LTD(CHINA)
Type : VF389A1D
2.2. Circuit construction, measurement circuit
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
Characteristics :
Source impedance
Zs=50
Load impedance
ZL=2k//3pF
Item Freq min
Insertion attenuation
Reference level
37.40MHz
11.5
38.90MHz 4.5
33.90MHz 6.0
34.47MHz
-
33.40MHz 20.0
32.90MHz
-
Relative attenuation
32.40MHz
30.90MHz
-
45.0
31.90MHz 45.0
40.15MHz 35.0
40.40MHz 44.0
41.40MHz 42.0
40.90MHz 42.0
Between any terminals
Between any terminals
T A=25
typ max
13.5 15.5
dB
6.0 7.5
7.5 9.0
1.3 -
24.0 -
50.0 -
55.0 -
58.0 -
52.0 -
40.0 -
52.0 -
55.0 -
53.0 -
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
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