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参数资料
| 型号： | W681512W |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 编解码器 |
| 英文描述： | A/MU-LAW, PCM CODEC, PDSO20 |
| 封装： | PLASTIC, TSSOP-20 |
| 文件页数： | 35/36页 |
| 文件大小： | 448K |
| 代理商： | W681512W |
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W681512
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7. FUNCTIONAL DESCRIPTION
W681512 is a single-rail, single channel PCM CODEC for voiceband applications. The CODEC
complies with the specifications of the ITU-T G.712 recommendation. The CODEC also includes a
complete
μ-Law and A-Law compander. The μ-Law and A-Law companders are designed to comply
with the specifications of the ITU-T G.711 recommendation.
The block diagram in section 3 shows the main components of the W681512. The chip consists of a
PCM interface, which can process long and short frame sync formats, as well as GCI and IDL formats.
The pre-scaler of the chip provides the internal clock signals and synchronizes the CODEC sample
rate with the external frame sync frequency. The power conditioning block provides the internal
power supply for the digital and the analog section, while the voltage reference block provides a
precision analog ground voltage for the analog signal processing. The main CODEC block diagram
is shown in section 3.
Figure 7.1 The W681512 Signal Path
7.1. Transmit Path
The A-to-D path of the CODEC contains an analog input amplifier with externally configurable gain
setting (see application examples in section 11). The device has an input operational amplifier whose
output is the input to the encoder section. If the input amplifier is not required for operation it can be
powered down and bypassed. In that case a single ended input signal can be applied to the AO pin or
the AI- pin. The AO pin becomes high input impedance when the input amplifier is powered down. The
input amplifier can be powered down by connecting the AI+ pin to VDD or VSS. The AO pin is selected
PAO+
PAO
8
μ/A-
Contr
AI+
AI -
w
μ/A-
Contr
ol
AO
+
RO -
-
VA
G
Ant-Aliasi
Filter
= 3400
Hz
Ant
i
-Aliasi
n
Filter
fC = 200
Hz
High
Pas
Filte
Smoothi
nFilter
2
Hz
Smoothi
nFilter
1
8
μ/A
Control
8
μ/A-
Control
PAI
VAG
Ant-Aliasing
Filter
-
Aliasing
Filter
Ant-
Filter
High Pass
Filter
Smoothing
Filter
Smoothing
Filter
Receive Path
Transmit Path
+ -
- +
+
-
+
-
A/D
Converter
D/A
Converter
fC= 3400Hz
C
= 200Hz
f
RO +
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W681512WG | 功能描述:IC VOICEBND CODEC 5V 1CH 20TSSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 编解码器 系列:- 标准包装:2,500 系列:- 类型:立体声音频 数据接口:串行 分辨率（位）:18 b ADC / DAC 数量:2 / 2 三角积分调变:是 S/N 比，标准 ADC / DAC (db):81.5 / 88 动态范围，标准 ADC / DAC (db):82 / 87.5 电压 - 电源，模拟:2.6 V ~ 3.3 V 电压 - 电源，数字:1.7 V ~ 3.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-WFQFN 裸露焊盘 供应商设备封装:48-TQFN-EP（7x7） 包装:带卷 (TR) |
| W681512WG TR | 功能描述:IC VOICEBND CODEC 5V 1CH 20TSSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 编解码器 系列:- 标准包装:2,500 系列:- 类型:立体声音频 数据接口:串行 分辨率（位）:18 b ADC / DAC 数量:2 / 2 三角积分调变:是 S/N 比，标准 ADC / DAC (db):81.5 / 88 动态范围，标准 ADC / DAC (db):82 / 87.5 电压 - 电源，模拟:2.6 V ~ 3.3 V 电压 - 电源，数字:1.7 V ~ 3.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-WFQFN 裸露焊盘 供应商设备封装:48-TQFN-EP（7x7） 包装:带卷 (TR) |
| W681512WG-TR | 制造商:Nuvoton Technology Corp 功能描述:IC VOICEBND CODEC 5V 1CH 20TSSOP |
| W681513 | 制造商:WINBOND 制造商全称:Winbond 功能描述:5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS |
| W681513_05 | 制造商:WINBOND 制造商全称:Winbond 功能描述:5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS |
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