Technical information

Chapter 3: Electrical and Environmental Specifications
December 15, 2009 G30 - Module Hardware Description 57
Signal-to-noise ratio
75 dB
Gain stage = +12dB
Bandwidth = 300-3900Hz
(GSM mode)
72 dB
Gain stage = +12dB
Bandwidth = 300-7000Hz
(WAMR mode)
Power supply rejection
66 85 dB
Gain stage = +24dB
U
VDD
(t) =
2.5V+0.15V•sin(2π•1kHz•t)
62 dB
Gain stage = +18dB
U
VDD
(t) =
2.5V+0.15V•sin(2π•1kHz•t)
45 dB
Gain stage = +0dB
U
VDD
(t) =
2.5V+0.15V•sin(2π•1kHz•t)
Cross talk (between Rx and Tx
channel)
-65 dB
U
TX
(t) = 1.075V+
U
RX
(t) =
0.775V•sin(2π•1kHz•t)
Cut-off frequency of anti-alias
filter
16 kHz
Absolute gain drift ±2 %
Variation due to change in
supply,
temperature and life time.
Table 3-8: Microphone Supply Characteristics
Parameter
Limit Values
Unit Remarks
Min Typ Max
Output voltage of pin VMIC 2.20 V
Settable to: 1.8 V, 2.0 V, 2.2
V typ.
Microphone supply current 2.0 mA
Power supply rejection of micro-
phone supply
75 dB
Gain stage = +0dB in
crosstalk free conditions at
board level
U
VDD
(t) =
2.6V+0.10V•sin(2π•1kHz•t)
Table 3-7: Audio Transmit Path Characteristics (Cont.)
Parameter
Limit Values
Unit Remarks
Min Typ Max