Details

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BUY ER502 https://www.utsource.net/itm/p/12611761.html

Parameter	Description
Part Number	ER502
Type	Electret Condenser Microphone
Polar Pattern	Omnidirectional
Frequency Response	100 Hz to 10 kHz
Sensitivity	-44 dB (6.3 mV/Pa) at 1 kHz
Impedance	2.2 k惟
Operating Voltage	1.5 V to 10 V DC
Current Consumption	0.5 mA typical
Operating Temperature	-20掳C to +70掳C
Storage Temperature	-40掳C to +85掳C
Dimensions	9.7 mm (Diameter) x 6.0 mm (Length)
Weight	0.7 g

Instructions for Use

1. Power Supply:

   • Connect the positive terminal of the microphone to the power supply (1.5 V to 10 V DC).
   • Connect the negative terminal to ground.

2. Signal Output:

   • The signal output is taken from the positive terminal relative to ground.
   • Ensure that the load impedance is greater than 2.2 k惟 for optimal performance.

3. Mounting:

   • Mount the microphone in a location where it can capture sound without obstruction.
   • Avoid placing the microphone near sources of electromagnetic interference.

4. Handling:

   • Handle the microphone with care to avoid damage to the sensitive components.
   • Do not expose the microphone to excessive moisture or humidity.

5. Testing:

   • To test the microphone, apply the operating voltage and use an oscilloscope or audio analyzer to verify the output signal.
   • Speak into the microphone and observe the signal level to ensure proper operation.

6. Storage:

   • Store the microphone in a dry, cool place when not in use.
   • Avoid exposing the microphone to extreme temperatures or high humidity levels.

(For reference only)