TS472_06 Datasheet, PDF (4/24 Pages) STMicroelectronics – Very low noise microphone preamplifier with 2.0V bias output and active low standby mode

Typical application schematic
2
Typical application schematic
Figure 1 shows a typical application schematic for the TS472.
Figure 1. Application schematic (flip-chip)
TS472
Table 2. External component descriptions
Components
Functional description
C_in+, C_in-
C_out+, C_out-
Input coupling capacitors that block the DC voltage at the amplifier input
terminal.
Output coupling capacitors that block the DC voltage coming from the
amplifier output terminal (pins C2 and D2) and determine Lower cut-off
frequency.
R_out+, R_out-
R_pos, R_neg
C_s
C_b
C₁, C₂
Output load resistors used to charge the output coupling capacitors C_out.
These output resistors can be represented by an input impedance of a
following stage.
Polarizing resistors for biasing of a microphone.
Supply bypass capacitor that provides power supply filtering.
Bypass pin capacitor that provides half-supply filtering.
Low pass filter capacitors allowing to cut the high frequency.
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