TS472_06 Datasheet, PDF (12/24 Pages) STMicroelectronics – Very low noise microphone preamplifier with 2.0V bias output and active low standby mode

Electrical characteristics
TS472
Figure 20. Maximum input voltage vs. gain,
THD+N<1%
Figure 21. Maximum input voltage vs. power
supply voltage, THD+N<1%
150
100
50
0
0
V =5.5V
CC
T =25°C
AMB
F=1kHz
THD+N<1%
V =3V
CC
V =2.2V
CC
10
20
30
40
Gain (dB)
140
T =25°C, F=1kHz, THD+N<1%
AMB
120
Gain=0dB
100
80
60
Gain=30dB Gain=20dB
40
Gain=40dB
20
0
2.2
3
4
5
5.5
Power Supply Voltage (V)
Figure 22. THD+N vs. input voltage
10
GS floating
GS=bias
1
Figure 23. THD+N vs. input voltage
10
GS floating
GS=bias
1
0.1
0.1
GS grounded
GS grounded
Tamb=25°C, Vcc=3V, F=100Hz,
0.01 _{Cb=1μF, RL=10kΩ , BW=100Hz-120kHz}
Tamb=25°C, Vcc=5V, F=100Hz,
0.01 _{Cb=1μF, RL=10kΩ , BW=100Hz-120kHz}
1E-3
0.01
0.1
0.3
Input Voltage (V)
1E-3
0.01
0.1
0.3
Input Voltage (V)
Figure 24. THD+N vs. input voltage
10
GS floating
GS=bias
1
Figure 25. THD+N vs. input voltage
10
GS floating
GS=bias
1
0.1
0.1
GS grounded
GS grounded
Tamb=25°C, Vcc=3V, F=1kHz,
0.01 _{Cb=1μF, RL=10kΩ , BW=100Hz-120kHz}
Tamb=25°C, Vcc=5V, F=1kHz,
0.01 _{Cb=1μF, RL=10kΩ , BW=100Hz-120kHz}
1E-3
0.01
0.1
0.3
Input Voltage (V)
1E-3
0.01
0.1
0.3
Input Voltage (V)
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