Datasheet

OF9745C-40CS-L01000-00-0
9. Reliability Test
After each of following test, the sensitivity of the microphone should be within ±3dB of initial
sensitivity after 3hours of conditioning at 20℃.
1. Vibration Test
Frequency : 10Hz~55Hz
Amplitude : 1.52mm
Change of Frequency : 1 octave/min
2 hours in each of axes
2. High Temperature Test
+75 for 240 hours.℃
3. Low Temperature Test
- 40℃ for 240 hours.
4. Humidity Test
90%～95%RH,+60℃ for 240 hours.
5. Thermal shocking test
–40°C, 30 minutes ↔ +75°C, 30 minutes, repeated 32 cycles → room temperature, 3 hours.
6.Temperature Cycles
-40℃ +20℃ +75℃ +20℃ -40℃
(2h) (0.5h) (2h) (0.1h) (2h) (0.5h) (2h) (0.5h) (2h) for 5 cycles.
7. Packing Drop Test
Height：1.5m
Procedure: 5 times from each of axes
8. Electrostatic discharge
Tested to IEC61000-4-2 level 3：
a) Contact discharge
The microphone shall operate normally after 10 discharges to is 6KV DC and the discharge
network is 150pF and 330Ω.
b) Air discharge
The microphone shall operate normally after 10 discharges to is 8KV DC and the discharge
network is 150pF and 330Ω
10. Soldering Condition
1. We suggest using anti-static welding machine which can control soldering temperature automatically.
2. Soldering temperature should be controlled under 320℃ and soldering time for each terminal should
be 1~2 sec..
3. Microphone should be fixed on the metal block (heat sink), which has high radiation effects, and heat
sink shall contact with MIC tightly.
4. Microphone may easily be destroyed by the static electricity and the countermeasure for eliminating
the static electricity shall be executed (worktable and human body shall be ground connection).