AVL300 User manual
TRACAVL300UM001
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Figure 17.
Typical Audio Connection
3.13.1.
Microphone Input Characteristics
Table 9: The Characteristics of Microphone
Parameter
Min
Typ
Max
Unit
Working Voltage
1.0
1.5
2.0
V
Working Current
200
500
uA
External Microphone Load Resistance
2.2
k Ohm
Notes:
1 - Using electret microphone, sensitivity of -42 ± 3 dB/Pa @ 2V, impedance 2.2kΩ.
2 - For RF noise suppression, two capacitors that 10pF and 33pF are recommended to be
included within the microphone.
