TS472_06 Datasheet, PDF (7/24 Pages) STMicroelectronics – Very low noise microphone preamplifier with 2.0V bias output and active low standby mode

TS472
Electrical characteristics
Note:
Table 7.
Gain
(dB)
0
20
40
Differential RMS noise voltage
Input referred noise voltage
(μV_RMS)
Unweighted filter A-weighted filter
15
10
3.4
2.3
1.4
0.9
Output noise voltage
(μV_RMS)
Unweighted filter A-weighted filter
15
10
34
23
141
91
Table 8.
Bias output RMS noise voltage
C_out
Unweighted filter
(μF)
(μV_RMS)
1
5
10
2.2
A-weighted filter
(μV_RMS)
4.4
1.2
Table 9.
Gain
(dB)
0
20
40
SNR (signal to noise ratio), THD+N < 0.5%
Unweighted filter
(dB)
A-weighted filter
(dB)
V_CC=2.2V
75
82
70
V_CC=3V
76
83
72
V_CC=5.5V
76
83
74
V_CC=2.2V
79
89
80
V_CC=3V
80
90
82
V_CC=5.5V
80
90
84
Unweighted filter = 20Hz ≤F ≤20kHz
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