Microphone Input Characteristics; Line Level Input Characteristics - Oasis 4 MOST User Manual

Amplifier 4 MOST
User Manual

3.3 Microphone Input Characteristics

The microphone input is a differential input with a DC Bias suitable for electret or active microphones.
Microphone input characteristics:
Symbol Description
V Microphone Bias Voltage
mbias
I Microphone Bias Current
mic
V Full Scale Input Voltage
mffs
Z Input Impedance
in
PSRR Power Supply Rejection
CMRR Common Mode Rejection
f Low frequency cutoff
lo
f High Frequency cutoff
hi
Frequency response

3.4 Line Level Input Characteristics

The Amplifier 4 MOST includes one set of stereo, line-level analog inputs. These inputs can be used
as audio inputs to the Amplifier 4 MOST.
Line input characteristics:
Symbol Description
V Full Scale Input Voltage
lffs
Z Input Impedance
in
PSRR Power Supply Rejection
CMRR Common Mode Rejection
SNR Signal to Noise Ratio
f Low frequency cutoff
lo
f High Frequency cutoff
hi
Frequency response
User Manual
1)
Conditions
From f
Table 3-3: Microphone Input characteristics
Conditions
From 20 Hz to 20 kHz
Table 3-4: Line level input characteristics
© Copyright 2002 - 2003 OASIS SiliconSystems
Amplifier 4 MOST Version: 2.0 User Manual
Document Version: 2.0-03 Release Date: 2003-07-23
Min
to f -3
lo hi
Min
-3
Typ Max Units
8.2 V
5 mA
265 mV
rms
1
kΩ
-60 dB
-45 dB
5.3 Hz
4.8 kHz
0.5 dB
Typ Max Units
440 mV rms
10
kΩ
-60 dB
-45 dB
85 dB
1.6 Hz
20 kHz
0.5 dB
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