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TS472 Datasheet(PDF) 3 Page - STMicroelectronics

No. de pieza TS472
Descripción Electrónicos  Very low noise microphone preamplifier with 2.0 V bias output and active low standby mode
PDF  25 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS472 Datasheet(HTML) 3 Page - STMicroelectronics

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TS472
Typical application schematic
Doc ID 11015 Rev 6
3/25
1
Typical application schematic
Figure 1 shows a typical application schematic for the TS472.
Figure 1.
Application schematic (flip-chip)
Table 1.
Description of external components
Components
Functional description
Cin+, Cin-
Input coupling capacitors that block the DC voltage at the amplifier input
terminal.
Cout+, Cout-
Output coupling capacitors that block the DC voltage coming from the
amplifier output terminal (pins C2 and D2) and determine the lower cut-off
frequency (see Section 4.3: Lower cut-off frequency).
Rout+, Rout-
Output load resistors used to charge the output coupling capacitors Cout.
These output resistors can be represented by an input impedance of a
following stage.
Rpos, Rneg
Polarizing resistors for biasing of a microphone.
Cs
Supply bypass capacitor that provides power supply filtering.
Cb
Bypass pin capacitor that provides half-supply filtering.
C1, C2
Low pass filter capacitors allowing to cut the high frequency.
C3
Bias output filtering capacitor.
VCC
Electret Mic
Rpos
Rneg
Standby Control
Positive Output
Negative Output
1uF
Cb
1uF
Cs
1uF
C3
C1
C2
Cin+
Cin-
+
Cout+
Cout-
Rout+
Rout-
Bias
IN-
IN+
G
OUT+
OUT-
GAIN
BYPASS
BIAS
Vcc
SELECT
2.0V
U1
TS472_FC
Optional



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