ZL38003_06 Datasheet, PDF (1/7 Pages) Zarlink Semiconductor Inc – AEC with Noise Reduction & Codecs for Digital Hands-Free Communication

ZL38003
AEC with Noise Reduction & Codecs for
Digital Hands-Free Communication
Data Sheet
A full Design Manual is available to qualified
customers. To register, please send an email to
[e-mail].
Features
• Handles up to -6 dB acoustic echo return loss
• 127 ms acoustic echo canceller
• Provides up to 12 dB of Noise Reduction
• Operate in two modes, Dual Analog mode and
single Analog mode (other port is digital PCM)
• PCM Data Formats in single Port mode- 16-bit
Linear, companded ITU-T A-law or U-law
• Advanced NLP design - full duplex speech with
no switched loss on audio paths
• Tracks changing echo environment quickly
• Adaptation algorithm converges even during
Double-Talk
• Designed for performance in high background
noise environments
• Provides protection against narrow-band signal
divergence
May 2006
Ordering Information
ZL38003GMG 81 Ball CBGA Trays, Bake & Drypack
ZL38003GMG2 81 Ball CBGA** Trays, Bake & Drypack
**Pb Free Tin/Silver/Copper
-40°C to +85°C
• Howling prevention eliminates uncontrolled
oscillation in high loop gain conditions
• AGC on speaker path
• Transparent data transfer and mute options
• Boot loadable for future factory software upgrades
• Serial micro-controller interface
• Two 16 bit linear ACD and DAC that meet ITU-T
G.711/712 recommendations
• Four Audio TX/RX Interfaces
• Differential Microphone Inputs
• Programmable Bias Voltage Output for Electret
microphones
• Microphone Presence Detection, Microphone
Mute
SCLK
CS_CODEC
CS_AEC
DATA1
DATA2
FPi
C4i
Rin
Sout
Serial
Microport
Interface
PCM
Timing
AEC
Rout/Sout
Sin/Rin
MCLK
RESETB
G.712
Codec
#1
G.712
Codec
#0
Crosspoint
AUXTONE
Audio Interface
#3
Audio Interface
#2
Audio Interface
#1
Audio Interface
#0
Figure 1 - Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2005-2006, Zarlink Semiconductor Inc. All Rights Reserved.
EAR
MIC
BIAS
MICDET
EAR
MIC
BIAS
MICDET
EAR
MIC
EAR/SPEAKER
MIC
BIAS