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參數(shù)資料
| 型號： | SRC4194IPAG |
| 英文描述： | 4-Channel, Asynchronous Sample Rate Converter |
| 中文描述： | 4通道，異步采樣率轉(zhuǎn)換器 |
| 文件頁數(shù)： | 20/40頁 |
| 文件大?。?/td> | 502K |
| 代理商： | SRC4194IPAG |
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SBFS025A JUNE 2004 REVISED JULY 2004
PRODUCT OVERVIEW
www.ti.com
20
The SRC4194 is a four-channel, asynchronous sample
rate converter (ASRC), implemented as two stereo
sections, referred to as SRC A and SRC B. Operation at
input and output sampling frequencies up to 212kHz is
supported, with a continuous input/output sampling ratio
range of 16:1 to 1:16. Excellent dynamic range and
THD+N are achieved by employing high-performance,
linear-phase digital filtering with better than 140dB of
image rejection. The digital filters provide settings for lower
latency processing, including low group delay options for
the interpolation filter and a direct downsampling option for
the decimation filter. Digital de-emphasis filtering is
included, supporting 32kHz, 44.1kHz, and 48kHz
sampling frequencies.
The audio input and output ports support standard audio
data formats, as well as a time division multiplexed (TDM)
format. Word lengths of 24-, 20-, 18-, and 16-bits are
supported. Input and output ports may operate in Slave
mode, deriving their word and bit clocks from external input
and output devices. Alternatively, one port may operate in
Master mode while the other remains in Slave mode. In
Master mode, the LRCK and BCK clocks are derived from
the reference clock inputs, either RCKIA or RCKIB. The
flexible configuration options for the input and output ports
allow connections to a variety of audio data converters,
digital audio interface devices, and digital signal
processors.
A bypass mode is included, which allows audio data to be
passed directly from the input port to the output port,
bypassing the ASRC function. The bypass option is useful
for passing through compressed or encoded audio data,
as well as non-audio data (that is, control or status
information).
A soft mute function is available for the SRC4194 in both
Hardware and Software modes. Digital output attenuation
is available only in Software mode. Both soft mute and
digital attenuation functions provide artifact-free opera-
tion. The mute attenuation is typically 144dB, while the
digital attenuation function is adjustable from 0dB to
127.5dB in 0.5dB steps.
The SRC4194 includes a four-wire SPI port, which is used
to access on-chip control and status registers in Software
mode. The SPI port facilitates interfacing to microproces-
sors or digital signal processors that support synchronous
serial peripherals. In Hardware mode, dedicated control
pins are provided for the majority of the SRC4194
functions. These pins can be hard-wired or driven by logic
or host control.
FUNCTIONAL BLOCK DIAGRAM
Figure 1 shows a functional block diagram of the
SRC4194. The SRC4194 is segmented into two stereo
SRC sections, referred to as SRC A and SRC B. Each
section can operate independently from the other. Each
section has individual sets of configuration pins in
Hardware mode, and separate banks of control and status
registers in Software mode.
IFMTA0
IFMTA1
IFMTA2
OFMTA0
OFMTA1
OWLA0
OWLA1
BYPA
Control
SRC A
Rate
Estimator
f
sOUT
RDYA
RATIOA
f
sIN
LGRPA0
LGRPA1
DDNA
DEMA0
DEMA1
MODEA0
MODEA1
MODEA2
MUTEA
LGRPB0
LGRPB1
DDNB
DEMB0
DEMB1 (CDOUT)
MODEB0 (CS)
MODEB1 (CCLK)
MODEB2 (CDIN)
MUTEB
Control
SRC B
SPI Port
and
Reset
IFMTB0
IFMTB1
IFMTB2
OFMTB0
OFMTB1
OWLB0
OWLB1
BYPB
H/S
RST
V
IO
DGND
VDD18 (2)
VDD33 (2)
DGND
REGEN
LRCKIA
BCKIA
SDINA
RCKIA
Input
Serial
Port
Digital
DeEmphasis and
Interpolation Filters
ReSampler
Digital
Decimation
Filter
Output
Serial
Port
LRCKOA
BCKOA
SDOUTA
TDMIA
Rate
Estimator
f
sOUT
RDYB
RATIOB
f
sIN
LRCKIB
BCKIB
SDINB
RCKIB
Input
Serial
Port
Digital
DeEmphasis and
Interpolation Filters
ReSampler
Digital
Decimation
Filter
Output
Serial
Port
LRCKOB
BCKOB
SDOUTB
TDMIB
Figure 1. Functional Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SRC4194IPAGR | 4-Channel, Asynchronous Sample Rate Converter |
| SRC4194IPAGT | 4-Channel, Asynchronous Sample Rate Converter |
| SRD00224H | FIBER OPTIC RECEIVER |
| SRD00225H | FIBER OPTIC RECEIVER |
| SRD546-1B | Converter IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SRC4194IPAG | 制造商:Texas Instruments 功能描述:IC SAMPLE RATE CONV 4CH 64-TQFP |
| SRC4194IPAGG4 | 功能描述:音頻采樣頻率轉(zhuǎn)換器 4-Channel Async Sample Rate Conv RoHS:否 制造商:Texas Instruments THD + 噪聲:- 140 dB 接口:I2C, SPI 工作電源電壓:1.65 V to 2 V / 3 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:TQFP-48 安裝風(fēng)格:SMD/SMT |
| SRC4194IPAGR | 功能描述:音頻采樣頻率轉(zhuǎn)換器 4-Ch Asynch Sample Rate Converter RoHS:否 制造商:Texas Instruments THD + 噪聲:- 140 dB 接口:I2C, SPI 工作電源電壓:1.65 V to 2 V / 3 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:TQFP-48 安裝風(fēng)格:SMD/SMT |
| SRC4194IPAGRG4 | 功能描述:音頻采樣頻率轉(zhuǎn)換器 4-Ch Asynch Sample Rate Converter RoHS:否 制造商:Texas Instruments THD + 噪聲:- 140 dB 接口:I2C, SPI 工作電源電壓:1.65 V to 2 V / 3 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:TQFP-48 安裝風(fēng)格:SMD/SMT |
| SRC4194IPAGT | 功能描述:音頻采樣頻率轉(zhuǎn)換器 4-Channel Async Sample Rate Conv RoHS:否 制造商:Texas Instruments THD + 噪聲:- 140 dB 接口:I2C, SPI 工作電源電壓:1.65 V to 2 V / 3 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:TQFP-48 安裝風(fēng)格:SMD/SMT |
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