Publication Release Date: January 2009 - 8 - Revision A11 7. FUNCTIONAL DESCRIPTION W681511 is a single-rail, single chan" />
參數(shù)資料
型號： W681511DK
廠商： Nuvoton Technology Corporation of America
文件頁數(shù)： 31/32頁
文件大?。?/td> 0K
描述： KIT DEVELOPMENT FOR W681511
標準包裝： 1
主要目的： 音頻編解碼器
已用 IC / 零件： W681511
已供物品： 板，電源
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更多...
W681511
Publication Release Date: January 2009
- 8 -
Revision A11
7. FUNCTIONAL DESCRIPTION
W681511 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 W681511. 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 W681511 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-
Cont
AI+
AI -
w
μ/A-
Cont
ol
AO
+
RO+
-
VA
G
Ant-Aliasi
Filter
=
H
Ant
i
-Aliasi
n
Filter
fC = 200
H
High
Pas
Filt
Smoot
nFilter
2
H
Smoot
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W681511IS 制造商:WINBOND 制造商全稱:Winbond 功能描述:SINGLE-CHANNEL VOICEBAND CODEC
W681511S 功能描述:IC VOICEBAND CODEC 5V 1CH 20SOP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態(tài)范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
W681511SG 功能描述:IC VOICEBAND CODEC 5V 1CH 20SOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態(tài)范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
W681511SG TR 功能描述:IC VOICEBAND CODEC 5V 1CH 20SOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態(tài)范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
W681512 制造商:WINBOND 制造商全稱:Winbond 功能描述:SINGLE-CHANNEL VOICEBAND CODEC
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