M2M Control CX660 Technical Manual V1.02
Advanced Automotive M2MI/IoT Gateway
Page 25 of 44
3 pin SPK Out
Pin
Name
Description
Tip
SPK_OUT_P
Differential speaker positive (+) output
Ring
SPK_OUT_N
Differential speaker negative (-) output
Sleeve N.A.
Not connected internally
3 pin MIC In
Pin
Name
Description
Tip
MIC_BIAS
Bias voltage to the microphone
Ring
MIC_IN
Audio signal from the microphone
Sleeve GND
Signal ground
The specifications on the audio interface connectors are as following:
Parameter
Min.
Typ.
Max.
Unit
Description
Impedance
4
-
-
Ω
Output power
-
-
-
-
2.1
1.4
W
W
@ 4 ohm 50pF load
@ 8 ohm 50pF load
Headphone impedance
16
-
-
Ω
AC coupled
Full -scale input voltage
-
-
0.74
Vrms
Mic. bias voltage
-
2.5
-
V
±10%