User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Reserved. Page 50 of 82
Mod. 0805 2011-07 Rev.2
R-C filtering for HIGH impedance load.
10.3. Electrical Characteristics
10.3.1. Input lines
Microphone/Line-in path
Line Type Differential
Coupling capacitor ≥ 100nF
Differential input resistance 50kΩ
Levels
To have 0 dBfs @1KHz (*) Differential input voltage
MIC Gain = 0dB 290mVrms
MIC Gain = +6dB 145mVrms
MIC Gain = +12dB 72mVrms
MIC Gain = +18dB 36mVrms
MIC Gain = +24dB 18mVrms
MIC Gain = +30dB 9mVrms
MIC Gain = +36dB 4.5mVrms
MIC Gain = +42dB 2.25mVrms
(*) 0 dBfs in the network are +3.14 dBm0
EAR+
EAR-
TELIT MODULE
-
+
OUTPUTDAC
GND
HiZ CIRCUITRY