TS472_06 Datasheet, PDF (6/24 Pages) STMicroelectronics – Very low noise microphone preamplifier with 2.0V bias output and active low standby mode

Electrical characteristics
4
Electrical characteristics
TS472
Table 5.
Symbol
Electrical characteristics at V_CC = 3V
with GND = 0V, T_amb = 25°C (unless otherwise specified)
Parameter
Min. Typ.
Max.
e_n
THD+N
V_in
B_W
Equivalent input noise voltage density
R_EQ=100Ω at 1KHz
Total harmonic distortion + noise
20Hz ≤F ≤ 20kHz, Gain=20dB, V_in=50mV_RMS
Input voltage, Gain=20dB
Bandwidth @ -3dB
Bandwidth @ -1dB
pin A3, B3 floating
10
0.1
10 70
40
20
Overall output voltage gain (Rgs variable):
G
Minimum gain, Rgs infinite
Maximum gain, Rgs=0
-3 -1.5 0
39.5 41 42.5
Z_in Input impedance referred to GND
80 100 120
R_LOAD Resistive load
10
C_LOAD Capacitive load
100
I_CC Supply current, Gain=20dB
1.8 2.4
I_STBY Standby current
1
Power supply rejection ratio, Gain=20dB, F=217Hz,
PSRR ^{Vripple=200mVpp, inputs grounded}
Differential output
-70
Single-ended outputs,
-46
Unit
---n---V-----
Hz
%
mV_RMS
kHz
dB
kΩ
kΩ
pF
mA
μA
dB
Table 6.
Symbol
Bias output: V_CC = 3V, GND = 0V, T_amb = 25°C (unless otherwise specified)
Parameter
Min. Typ. Max. Unit
V_out
R_out
I_out
PSRR
No load condition
Output resistance
Output bias current
Power supply rejection ratio, F=217Hz,
V_ripple=200mVpp
1.9
2
2.1
V
80 100 120
W
2
mA
70 80
dB
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