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STA321 Scheda tecnica(PDF) 9 Page - STMicroelectronics

Il numero della parte STA321
Spiegazioni elettronici  4-channel digital audio system with FFX??driver
PDF  157 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA321 Scheda tecnica(HTML) 9 Page - STMicroelectronics

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STA321
Overview
Doc ID 15351 Rev 3
9/157
1
Overview
The STA321 is a single chip solution for digital audio processing applications of up to
4.0 channels.
The STA321 is part of the Sound Terminal™ family that together with the digital power stage
provides full digital audio streaming to the speaker, offering cost effectiveness, low energy
dissipation and sound enrichment.
The STA321 input section consists of two multiplexed stereo analog inputs, a 16-bit ADC
and two independent digital input interfaces. The serial audio data input interface accepts all
possible formats, including the popular I2S format. There is also a digital output interface fed
by the ADC or by the digitally processed signals.
The device has a full assortment of digital processing features. This includes sample rate
converter, pre and post mixing, up to 13 programmable 28-bit biquads (EQ) per channel,
bass/treble tone control and DRC. The embedded headphone detector indicates when
headphone jack is inserted.
The STA321 provides four independent channels of FFX™ output capabilities. In
conjunction with a power device, it provides high-quality, high-efficiency, all digital
amplification.
The embedded CMOS bridge supplies up to 0.5 W into an 8-
Ω load and 70 mW into a 16-Ω
load for the headphones output.
Figure 1.
STA321 block diagram
.
V_BIAS
VCM
VHI
VLO
BICLKI1
LRCLKI1
SDATAI1
INL1
INR1
HPDET
EAPWM4
EAPWM3
EAPWM2
EAPWM1
OUT1
OUT2
OUT3
PWM00
Bias
Serial audio
PGA
PGA
ADC
HP detection
Osc
PLL
Divider
I2C interface
interface
4-channel
CMOS
Serial audio
interface
FFX™
modulator
headphone
bridge
SRC
EAFTN
EATSN
EAPDN
BICLKI2
LRCLKI2
SDATAI2
INL2
INR2
Serial audio
interface



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