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STA330 Datasheet(PDF) 22 Page - STMicroelectronics

Part # STA330
Description  2.0 digital audio processor with FFX digital modulator and analog and digital inputs
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA330 Datasheet(HTML) 22 Page - STMicroelectronics

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Analog-digital converter (ADC)
STA330
22/55
7.1.2
High-pass filter characteristics
7.1.3
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 bits
PGA of register ADCCFG on page 47.
See Table 7 on page 10 for performance values.
7.2
Application scheme
Figure 9 shows the filter circuit.
Figure 9.
Block diagram
Table 13.
High-pass filter characteristics
Parameter
Typical
Frequency response:
-3 dB
-0.08 dB
7 Hz
50 Hz
Phase deviation at 20 Hz
19.35°
Pass-band ripple
0.08 dB
AC coupled
DC coupled
DC coupled
AC coupled
C9
C0
C5
C6
C7
C8
3-V, 3-A supply
VSSA
VSSA
R1
INL
INR
AVDD
AGND
VHI
VLO
VCM
VBIAS
C5 = 1 µF
(low ESR and ESL
capacitors are
recommended)
The VSSA plane must
be a different plane to the
other ground planes
The 3-V, 3-A supply
must be low-noise
and separate from
the other supplies
R1 = 500
Ω
C8 = 10 µF
C9, C0 = 1 µF (low ESR)
C6, C7 = 10 µF



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