频响曲线： As shown in fig(2)
1.SPECIFICATION HDK-220908ZA-1W1 (RoHS)
ITEM
SPECIFICATIONS
01
Type
Dynamic speaker
02
Dimension
External diameter 22*9 mm
03
Rated Input Power
0.5W (Long Time)
04
Max. Input Power
1.0W (Short Time)
05
Impedance
8 ohm ± 15% at 1500Hz.
06
Resonance Frequency (Fo)
900Hz ± 20% at Fo, 1V
07
Sensitivity (S.P.L.)
87dB(0.1W/0.1m) ± 3 dB
at AVE 1.2– 2.5KHz.
90dB (0.5W / 0.1m) ± 3 dB
08
Frequency Range
Fo – 20KHz
09
Total Harmonics Distortion
Max 8 % at 1 KHz,0.5W.
10
Voice Coil
Diameter 11*4 mm
11
Magnet
Rare earth permanent (Nd-Fe-B) magnet Φ10.4*3.45*1.2mm
12
Weight
2.0g ± 5%g
13
Appearance
Should not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc.
14
Operation Test
Must be normal at program source – 0.5W
15
Buzz, Rattle, etc.
Should not be audible at 2.0V sine Wave between Fo to 20KHz
16
Polarity
When positive voltage is applied to the terminal marked (+), diaphragm should move to the front.
17
Terminal Strength
Capable of withstand 1kg load for 30 seconds without resulting in any damage or rejection.
18
Temperature
Operating temperature: -20℃ to +60℃
Storage temperature: -30℃ to +70℃
1. MEASURING METHOD
2-1 .Test Condition
STANDARD
Temperature : 15 ~ 35℃
Relative humidity : 45% ~ 85%,
Atmospheric pressure : 860mbar to 1060mbar.
JUDGEMENT
Temperature : 20±3℃
Relative humidity : 60% ~ 70%,
Atmospheric pressure : 860mbar to 1060mbar
2-2 . Standard Test Fixture
1.Input Power : 0.8W ( 2.53V )
2.Zero Level : -dB
3.Mode : SPEAKER
4.potentiometer Range : 50dB
5.Sweep Time : 0.5sec
2-3. Frequency Response Curve
2. RELIABLITY TESTS
Items.
Specifications
01
High temp. Test
Keep 96 hours at +70℃±3℃ and leave 3 hours in normal temperature and then check
02
Low temp. Test
Keep 96 hours at -30℃±3℃ and leave 3 hours in normal temperature and then check
03
Humidity test
Keep 96 hours at + 60℃±3℃ relative humidity 95% and leave 3 hours in normal temperature and then checked.
04
Temp./Humidity cycle
The part shall be subjected 5 cycles. One cycle shall be 12 hours and consist of;
05
Thermal cycle test.
Low temperature: -30℃±3℃, temperature:+70℃±3℃, cycle:
1 hour/cycle each, and then keep 5 cycles in a room.
06
Vibration
10~200~10Hz sin-wave sweep 15min. 5G(constant)
X,Y, Z 3 direction. 2 hours each, total 6 hours.
07
Fix drop test
Fix on jig. Then drop from 152cm height to the concrete floor
X,y, z 6 direction. 5 times each, total 30 times.
08
Free drop test
Free drop from 100cm height to the concrete floor
X,y, z 6 direction. 1 times each, total 6 times.
09
Rated Power test
Rated Power white noise is applied for 96 hours
10
Max Power test
Max power 1 min on – 2 min off 10 cycles.
11
Terminal strength test
Capable of withstand 1kg load for 30 seconds without resulting in any damage or rejection.
Criterion:
After these test , the change of S.P.L shall be within ±3 dB .
898995850
