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參數(shù)資料
| 型號： | CS6422-ISZ |
| 廠商： | Cirrus Logic Inc |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 0K |
| 描述： | IC CODEC SPKRPHONE 2CH 20-SOIC |
| 標(biāo)準(zhǔn)包裝： | 37 |
| 類型： | 音頻處理器 |
| 應(yīng)用： | 揚(yáng)聲電話 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SOIC |
| 包裝： | 管件 |
| 其它名稱： | 598-1202-5 |
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 2001
(All Rights Reserved)
http://www.cirrus.com
CS6422
Enhanced Full-Duplex Speakerphone IC
Features
l Single-chip, full-duplex, hands-free operation
l Optional Tx Noise Guard
l Programmable attenuation during double-talk
l Optional 34 dB microphone preamplifier
l Dual channel AGC’ed volume controls with
mute
l Dual integrated 80 dB IDR codecs
l Speech-trained Network and Acoustic Echo
Cancellers
l Rx and Tx supplementary echo suppression
l Configurable half-duplex training mode
l Powerdown mode
l Microcontroller Interface
General Description
Most modern speakerphones use half-duplex operation,
which alternates transmission between the far-end talker
and the speakerphone user. This is done to ensure sta-
bility because the acoustic coupling between the
speaker and microphone is much higher in speaker-
phones than in handsets where the coupling is
mechanically suppressed.
The CS6422 enables full-duplex conversation using
echo cancellation and suppression in a single-chip solu-
tion. The CS6422 can easily replace existing half-duplex
speakerphone ICs with a huge increase in conversation
quality.
The CS6422 consists of telephone & audio interfaces,
two codecs and an echo-cancelling DSP.
CS6422-IS
-40o to 85oC
20-pin SOIC
CDB6422
Evaluation Board
TGain
TVol
Σ
+
-
Acoustic
Echo
Canceller
ADC
Pre-emphasis
Filter
+
ASdt
DAC
Σ
+
-
Network
Echo
Canceller
Pre-emphasis
Filter
+
NSdt
DAC
ADC
Clock
Generation
Voltage
Reference
Microcontroller Interface
RGain
RVol
(0, 6, 9.5, 12 dB)
Network
Sidetone
(none, -24,
-18, -12 dB)
Acoustic
Sidetone
(none, -24,
-18, -12 dB)
1 k
Mic
34 dB
(0, 6, 9.5, 12 dB)
NI
NO
17
4
8
76
5
15
2
19
18
APO
API
20
CLKO
13
14
CLKI
AO
3
AVDD
DVDD
NC1
NC2
NC3
NC4
910
11
12
16
1
(Mute, -12 to +30 dB)
Rx
Suppression
Tx
Suppression
JUL ‘01
DS295PP4
Copyright
Cirrus Logic, Inc. 2005
(All Rights Reserved)
CS6422
Enhanced Full-duplex Speakerphone IC
SEP ‘05
DS295F1
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