User's Manual

GV300 User manual
TRACGV300UM001 - 21 -
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.