TS472_06 Datasheet, PDF (11/24 Pages) STMicroelectronics – Very low noise microphone preamplifier with 2.0V bias output and active low standby mode

TS472
Electrical characteristics
Figure 14. Differential output PSRR vs.
frequency
0
V =200mV , Inputs grounded
RIPPLE
PP
V =3V, Minimum Gain, Cin=1μF, T =25°C
-20
CC
AMB
Figure 15. Differential output PSRR vs.
frequency
0
V =200mV , Inputs grounded
RIPPLE
PP
V =3V, Gain=20dB, Cin=1μF, T =25°C
-20
CC
AMB
-40
Cb=1μF
-40
No Cb
Cb=100nF
-60
-60
Cb=1μF
No Cb
-80
-100
50 100
1k
Frequency (Hz)
10k 20k
-80
-100
50 100
Cb=100nF
1k
Frequency (Hz)
10k 20k
Figure 16. Single-ended output PSRR vs.
frequency
Figure 17. Equivalent input noise voltage
density
0
Vripple=200mVpp
-10 Inputs grounded
Cb=1μF
-20 Cin=100nF
Tamb=25°C
-30
-40
-50
-60
-70
-80
50
Vcc=2.2V
100
Vcc=3V
Vcc=5V
1000
Frequency (Hz)
10000 20k
1000
100
10
1
10
Cin=100nF
R =100Ω
EQ
T =25°C
AMB
100
1k
10k
Frequency (Hz)
100k
Figure 18. Δgain vs. power supply voltage
Figure 19. Δgain vs. ambient temperature
1.0
F=1kHz
0.8 ^Vin=5mV
Tamb=25°C
0.6
Maximum Gain
0.4
0.2
0.0
-0.2
-0.4
2.2
Minimum Gain
Gain=20dB
3
4
5
5.5
Power Supply Voltage (V)
0.50
0.25
F=1kHz
V =5mV
IN
0.00
-0.25
-0.50
Maximum Gain
Gain=20dB
-0.75
Minimum Gain
-1.00
-40
-20
0
20
40
60
80
Ambient Temperature (°C)
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