STA308 반도체 회로 부품 판매점
MULTICHANNEL DIGITAL AUDIO PROCESSOR
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 ST Microelectronics |
STA308
MULTICHANNEL DIGITAL AUDIO PROCESSOR WITH DDX™
8 DDXTM Channels Capability (24 bit)
From 32kHz to 192kHz Input Sample Rates
Supported
Volume Control from 0 to -127 dB (0.5 dB steps)
Variable Digital Gain from 0 to 24dB (0.5dB
steps) with Digital Limiter Functionality and
TQFP64
Variable Attack and Release Time
ORDERING NUMBER: STA308
I2S Inputs and Outputs
Individual Channel and Master Gain/
t(s)Attenuation
Individual Channel Mute and Zero Input Detect
ucAuto-Mute
d Selectable Serial Audio Data Interface
ro Bass/Treble Controls
P Channel Mapping of any Input to any
teProcessing/DDXTM Channel
le Active Crossover Capability
so DC Blocking Selectable High-Pass Filter
b Selectable Bass Management on Channel 6
O Selectable Adjacent Channel Mixing Capability
) - Selectable DDXTM Headphone Output on
t(sChannels 7 & 8
c Selectable Clock Input Ratio
du Selectable De-emphasis
ro Selectable DDXTM Ternary, or Binary PWM
Poutput
te AM Interference Reduction Mode
Obsole I2C Control
DESCRIPTION
The STA308 is a single chip solution for digital audio
processing and control in multi-channel applications.
It provides output capabilities for DDXTM (Direct Digi-
tal Amplification). In conjunction with a DDXTM power
device, it provides high-quality, high-efficiency, all
digital amplification. The device is extremely versatile
allowing for input of most digital formats including 6.1
channel and 192kHz, 24-bit DVD-Audio.
The internal 24-bit DSP allows for high resolution
processing at all standard input sample frequencies.
Processing includes volume control, filtering, bass
management, gain compression/limiting and PCM
and DDXTM outputs. Filtering includes five user-pro-
grammable 28-bit biquads for EQ per channel, as
well as bass, treble and DC blocking. External clock-
ing can be provided at 4 different ratios of the input
sample frequency. All sample frequencies are up-
sampled for processing. Each internal processing
channel can receive any input channel, allowing flex-
ibility and the ability to perform active digital cross-
over for powered loudspeaker systems.
The serial audio data interface accepts many differ-
ent formats, including the popular I2S format. Eight
channels of DDX processing are performed.
April 2010
1/33
STA308
BLOCK DIAGRAM
SA SCL SDA MVO
LRCKI
BICKI
SDI12
SDI34
SDI56
SDI78
SERIAL
DATA
IN
I2C
SYSTEM
CONTROL
OVERSAMPLING
DDX
OUT1A/B
OUT2A/B
OUT3A/B
OUT4A/B
OUT5A/B
OUT6A/B
OUT7A/B
CHANNEL
MAPPING
VARIABLE
OVER-
SAMPLING
TREBLE,
BASS, EQ
(BIQUADS)
VOLUME
LIMITING
OUT8A/B
LRCKO
SYSTEM TIMING
SERIAL
DATA
BICKO
SDO12
PLLB
PLL
POWER
DOWN
VARIABLE
DOWN-
SAMPLING
OUT
SDO34
SDO56
SDO78
)XTI CKOUT
PWDN EAPD
uct(sFigure 1. Signal Flow Diagram
ProdChannels 1-8
te1st Stage
Interpolation
leOutput
bso8 Inputs
- OFrom I2S
Channel
Mapping
Scale
& Mix
Interp_Rate
Bass Management
(Channel 6 only)
1x,2x,4x
Interp
BME
Biquads
B/T
Volume
Limiter
2x
Interp
duct(s)Noise & Distortion Reduction
PWM
DDX
Output
Pro DDX
Obsolete (Channels 7&8 only) Headphone
2/33
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제조업체: ST Microelectronics
( stm )
STA308 data
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[ STA308.PDF ]
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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