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參數(shù)資料
| 型號(hào)： | AD1843 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | Codec |
| 英文描述： | Serial-Port 16-Bit SoundComm Codec(串口16位編碼譯碼器) |
| 中文描述： | 串行端口16位SoundComm編解碼器（串口16位編碼譯碼器） |
| 文件頁數(shù)： | 1/64頁 |
| 文件大?。?/td> | 873K |
| 代理商： | AD1843 |
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a
Serial-Port 16-Bit
SoundComm Codec
AD1843
FEATURES
Single Chip Integrated Speech, Audio, Fax and Modem
Codec
Highly Configurable Stereo
∑
ADCs and Quad
∑
DACs
Supports V.34, V.32bis, and Fallback Modem Standards
As Well As Voice Over Data
Dual Digital Resamplers with Programmable Input and
Output Phase and Frequency
Three On-Chip Phase Lock Loops for Synchronization to
External Signals, Including Video
Thirteen Analog Inputs and Seven Analog Outputs
Advanced Analog and Digital Signal Mixing and Digital-
to-Digital Sample Rate Conversion
Programmable Gain, Attenuation and Mute
On-Chip Signal Filters
Digital Interpolation and Decimation
Analog Output Low Pass
1 Hz Resolution Programmable Sample Rates from 4 kHz
to 54 kHz Derived from a Single Clock Input
80-Lead PQFP and 100-Lead TQFP Packages
Operation from +5 V or Mixed +5 V/+3 V Supplies
FIFO-Buffered Serial Digital Interface Compatible with
ADSP-21xx Fixed-Point DSPs
Advanced Power Management
VHDL Model of Serial Port Available; Evaluation Board
and MAFE Board Available
GENERAL PRODUCT DESCRIPTION
The AD1843 SoundComm Codec is a complete analog front
end for high performance DSP-based telephony and audio ap-
plications. The device integrates the real-world analog I/O re-
quirements for many popular functions thereby reducing size,
power consumption, and system complexity. The AD1843
SoundComm is the world’s first codec which can support four
different sample rates simultaneously, without any beat fre-
quency noise issues. This is essential for highly integrated audio/
modem/fax products since the sample rates associated with au-
dio are very much distinct from the sample rates associated with
telephony-oriented data communication. It is also the first codec
to offer on-chip digital phase lock loops for sample rate synchro-
nization to external clock signals. This sample rate flexibility is
enabled through Analog Devices’ Continuous Time Oversampling
(CTO) technology.
The main elements of the AD1843 are its extensive input and mix-
ing section, its two channels of sigma-delta (
∑
) analog-to-digital
conversion, its four channels of
∑
digital-to-analog conversion, its
digital filters, and the clock and control circuitry for implementing
the device’s different modes. The AD1843 permits flexible sample-
rate selection through programming and external synchronization,
many input and output options, and many mixing options.
(continued on page 11)
SoundComm is a trademark of Analog Devices, Inc.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
20 dB
4
3
GNDA
V
CC
∑
ADC
GAM = GAIN
ATTENUATION
MUTE
LEFT AND
RIGHT CHANNELS
GAM
GAM
FIFO
ADC
DAC1
DAC2
D
I
G
I
T
A
L
I
N
T
E
R
F
A
C
E
2
CONTROL
REGISTERS
LEFT AND
RIGHT CHANNELS
GNDD
V
DD
FILTL
CMOUT
V
REF
FILTR
4
2
HPOUTR
LOUT2
SUM
HPOUTC
HPOUTL
LOUT1
2
2
MOUT
2
1
2
MIN
AUX3
AUX2
AUX1
MIC
LIN
3
SYNC
XTAL
CONV
BIT
CLKOUT
4
8
9
AAFILTL AAFILTR
RESET
PWRDWN
2
PDMNFT
MUTE
GAM
GAM
GAM
GAM
GAM
GAM
MUTE
MUTE
MUTE
ATTN
2
3
ATTN
MUTE
S
E
L
E
C
T
O
R
MUTE
SCLK
SDFS
SDI
SDO
BM
CS
TSO
TSI
XCTL [1:0]
μ/A
LAW
3
CLOCK GENERATION
ATTN
M
U
T
E
MUTE
DRIVER
μ/A
LAW
FIFO
μ/A
LAW
S
E
L
E
C
T
O
R
S
E
L
E
C
T
O
R
PGA
∑
DAC
∑
∑
∑
∑
∑
∑
DAC
MUTE
∑
∑
∑
M
U
T
E
ATTN
∑
VOLTAGE REFERENCE
AD1843
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD1845JP-REEL | Parallel-Port 16-Bit SoundPort Stereo Codec |
| AD1845JP | Parallel-Port 16-Bit SoundPort Stereo Codec |
| AD1845JST | Parallel-Port 16-Bit SoundPort Stereo Codec |
| AD1845 | Parallel-Port 16-Bit SoundPort Stereo Codec(并行口16位立體聲編碼解碼器) |
| AD1846 | Low Cost Parallel-Port 16-Bit SoundPort Stereo Codec(低成本并行口16位立體聲編碼譯碼器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD1843JS | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| AD1843JST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Serial-Port 16-Bit SoundComm Codec |
| AD1845 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Parallel-Port 16-Bit SoundPort Stereo Codec |
| AD1845JP | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 68-Pin PLCC 制造商:Rochester Electronics LLC 功能描述:16 BIT AUDIO CODEC - Bulk 制造商:Analog Devices 功能描述:IC CODEC 16-BIT AUDIO |
| AD1845JP-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 68-Pin PLCC T/R |
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