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参数资料
| 型号： | CS6403 |
| 厂商： | Cirrus Logic, Inc. |
| 元件分类： | Codec |
| 英文描述： | Echo-Cancelling Codec |
| 中文描述： | 回声取消编解码器 |
| 文件页数： | 38/54页 |
| 文件大小： | 761K |
| 代理商： | CS6403 |
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Hardware
Power Supply
The CDB6403 requires +5V DC power to oper-
ate. Two terminal blocks provide power to the
evaluation board. One powers the analog side of
the board and the other powers the digital side.
Note that the digital power for the CS6403 itself
is derived from the analog power supply through
a 2
resistor. Figure 1 shows the power supply
circuitry in greater detail.
Near-End Analog Interface
SPKROUT is a screw terminal connector which
allows you to connect directly to an 8
speaker.
J14 and J15 provide the ability to access the
SPKROUT signals before they get to the connec-
tor. These allow the system evaluator to
implement their own speaker driver in the patch
area and connect it to the SPKROUT connector.
The MICIN connector is a 1/8" stereo jack.
Only the left channel is connected since micro-
phones are usually monophonic. Note that the
MICIN connector provides phantom power by
default. You may want to use the patch area to
provide an alternative connector.
Microphone Circuitry
A MC33078 dual op-amp performs two neces-
sary functions: provide a clean phantom power
supply, and provide additional input gain. Fig-
ure 2 shows how this circuitry is implemented.
Phantom power is provided via pin 7 of the
MC33078 through a resistor. The input voltage
for this non-inverting amplifier is VCM which is
a stable 1 V reference produced by the CS6403.
The amplifier provides a 2.3x gain to produce a
stable 2.3VDC output for phantom power.
Additional gain is provided by the other half of
the MC33078. The configuration is a differential
amplifier with the swing biased around VCM
(1VDC).
Note that the default gain of the differential am-
plifier is 6dB. In order to change the gain,
change R105, R104, and C101. It is important
to make sure R104 and R105 are the same value,
and that R101
×
C100 is approximately equal to
(R106+R104)
×
C101. These conditions will en-
sure good common mode rejection.
J2
P6KE6.8
Z1
1
μ
F
TANT
C2
+
+5VD
DGND
J9
P6KE6.8
Z3
1
μ
F
TANT
C14
+
+5VA
AGND
R5
2
+5VD1
DGND
+5VD
AGND
+5VA
Figure 1. Power Supply Circiutry
+5VA
VCMOUT
C103
0.1
μ
F
20k
R105
20k
R104
10k
R101
10k
R106
1k
R100
1k
R107
C100
1
μ
F
+
C101
0.33
μ
F
+
+
-
J12
VCM
-
+
VCM
VCMOUT
13k
R102
10k
R103
2
3
1
6
5
7
Figure 2. Microphone Phantom Power and Supplemental Amplifier
CDB6403
38
DS192DB3
相关PDF资料 |
PDF描述 |
|---|---|
| CS6403-IL | Echo-Cancelling Codec |
| CS6403-IQ | Echo-Cancelling Codec |
| CS6420 | FULL DUPLEX SPEAKERPHONE CHIP |
| CS6420-CS | FULL DUPLEX SPEAKERPHONE CHIP |
| CS6422-IS | Enhanced Full-Duplex Speakerphone IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CS6403-000 | 制造商:TE Connectivity 功能描述:High Performance Cable 制造商:TE Connectivity 功能描述:100A1111-22-0-0-CA |
| CS6403-IL | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Echo-Cancelling Codec |
| CS6403-IQ | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Echo-Cancelling Codec |
| CS640525 | 功能描述:DIODE MOD FST-REC SGL 500V 250A RoHS:否 类别:半导体模块 >> 二极管，整流器 系列:- 标准包装:10 系列:- 电压 - 在 If 时为正向 (Vf)（最大）:1.45V @ 30A 电流 - 在 Vr 时反向漏电:15µA @ 400V 电流 - 平均整流 (Io)（每个二极管）:30A 电压 - (Vr)（最大）:400V 反向恢复时间(trr):65ns 二极管类型:标准 速度:快速恢复 = 200mA（Io） 二极管配置:2 个独立式 安装类型:底座安装 封装/外壳:ISOTOP 供应商设备封装:ISOTOP? 包装:管件 |
| CS6405AM | 制造商:Cypress Semiconductor 功能描述: |
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