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GC868-DUAL EVK2 User Guide
1vv0300803 Rev.1- May 2009
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 29
of 55
11.2 Stand-alone microphone
Nominal sensitivity
-45dBV
rms
/1Pa (+/- 3dB)
Line coupling
AC
Nominal Voltage
2V
Range of Using Voltage
(1÷10)V
Consumption Current
(150÷500 )
μ
A
Impedance
2,2K
Ω
Signal to Noise Ratio
56dB /1KHz/1Pa /A curve
EMI capacitor between
terminals
10pF, 33pF
Table 4: Microphone electrical characteristics
11.3 Speaker
Rated Input Power
500 mW
Maximum Input Power
1W
Coil Impedance
≥
8
Ω
SPL
≥
85
±
3 dB @ 1KHz
Resonance frequency (Fo)
< 350Hz
Useful Bandwidth
Fo ÷ 8000 Hz @ -3dB
Table 5: Speaker electrical characteristics