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參數(shù)資料
| 型號： | ZL38001QDC |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | Low-Voltage Acoustic Echo Canceller with Low ERL Compensation |
| 中文描述： | DATACOM, ISDN ECHO CANCELLER, PQFP48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, MS-026ABC, TQFP-48 |
| 文件頁數(shù)： | 1/47頁 |
| 文件大?。?/td> | 668K |
| 代理商： | ZL38001QDC |
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Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2004, Zarlink Semiconductor Inc. All Rights Reserved.
Features
Contains two echo cancellers: 112 ms acoustic
echo canceller
Works with low cost voice codec. ITU-T G.711 or
signed mag
μ
/A-Law, or linear 2’s comp
Each port may operate in different format
Advanced NLP design - full duplex speech with
no switched loss on audio paths
Fast re-convergence time: tracks changing echo
environment quickly
Adaptation algorithm converges even during
Double-Talk
Designed for exceptional performance in high
background noise environments
Provides protection against narrow-band signal
divergence
Howling prevention stops uncontrolled oscillation
in high loop gain conditions
Offset nulling of all PCM channels
Serial micro-controller interface
ST-BUS, GCI, or variable-rate SSI PCM interfaces
User gain control provided for speaker path
(-24 dB to +48 dB in 3 dB steps)
18 dB gain at Sout to compensate for high ERL
environments
AGC on speaker path
Handles up to 0 dB acoustic echo return loss
Transparent data transfer and mute options
20 MHz master clock operation
Low power mode during PCM Bypass
Bootloadable for future factory software upgrades
2.7 V to 3.6 V supply voltage; 5 V-tolerant inputs
June 2004
Ordering Information
ZL38001DGA 36 Pin QSOP
ZL38001QDC 48 Pin TQFP
-40
°
C to +85
°
C
ZL38001
Low-Voltage Acoustic Echo Canceller
with Low ERL Compensation
Data Sheet
Figure 1 - Functional Block Diagram
Rout
MD1
MD2
P
Sin
Micro
Interface
Program
RAM
Program
ROM
Howling
Controller
NBSD
Linear/
μ
/A-Law
18dB
Gain
R
1
R
3
R
2
S
1
S
2
S
3
L
FORMAT
L
inear/
μ
/A-Law
Offset
Null
Linear
μ
/A-Law/
Adaptive
Filter
Offset
Null
VDD
VSS
RESET
F0i
BCLK/C4i
MCLK
Sout
Rin
DATA1
DATA2
CS
SCLK
ENA2
LAW
AGC
User
Gain
+
-
-24 -> +48dB
ADV
NLP
Linear
μ
/A-Law/
+
P
UNIT
CONTROL
Detector
Talk
Double
NBSD
ENA1
Limiter
Limiter
A
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相關代理商/技術參數(shù) |
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|---|---|
| ZL38001QDC1 | 制造商:Microsemi Corporation 功能描述: |
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| ZL38002 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:AEC with Noise Reduction & Codecs for Digital Hands-Free Communication |
| ZL38002_07 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Digital Echo Canceller for Hands Free Communication |
| ZL38002DGA1 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Low-Voltage Acoustic Echo Canceller With Noise Reduction |
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