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STA538B Datasheet(PDF) 24 Page - STMicroelectronics

No. de pieza STA538B
Descripción Electrónicos  2 x 1.3 W class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX
PDF  59 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA538B Datasheet(HTML) 24 Page - STMicroelectronics

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6.1.2
High-pass filter characteristics
6.1.3
Programmable gain amplifier
The programmable gain amplifier (PGA) is available in mic-in mode only. It is possible to
amplify the input signal from 0 to 42 db in steps of 6 db. The setting is done through PGA
bits of the ADCCFG register (see ADCCFG on page 50 for details).
See Table 11 on page 15 for performance values.
6.2
Application scheme
Figure 6 shows the filter circuit.
Figure 6.
Block diagram
Table 16.
High-pass filter characteristics
Parameter
Typical
Unit
Frequency response:
-3 dB
-0.08 dB
7
50
Hz
Hz
Phase deviation at 20 Hz
19.35
degree
Passband ripple
0.08
dB
AC coupled
DC coupled
DC coupled
AC coupled
C9
C0
C1
C5
C2
C6
C3
C7
C4
C8
3 V, 3 A supply
VSSA
VSSA
R1
INL
INR
AVDD
AGND
VHI
VLO
VCM
VBIAS
C1, C2, C3, C4 = 10 nF
(These capacitors must be
placed very close to their
respective pins)
C5, C6, C7 = 33 µF
(Low ESR and ESL
capacitors are
recommended)
VSSA plane must be
different from other
ground plane
3V, 3A must be a
low-noise supply and
separate from
other supplies
R1 = 500
Ω
C8 = 10 µF
C9, C0 = 1 µF



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