參數(shù)資料
型號: W6811IEG
廠商: WINBOND ELECTRONICS CORP
元件分類: 編解碼器
英文描述: A/MU-LAW, PCM CODEC, PDIP24
封裝: 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-24
文件頁數(shù): 36/37頁
文件大?。?/td> 589K
代理商: W6811IEG
W6811
Publication Release Date: September, 2005
- 8 -
Revision A12
7. FUNCTIONAL DESCRIPTION
W6811 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 W6811. 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 W6811 Signal Path
PAO+
PAO
8
μ/A-
Cont
AI+
AI -
w
μ/A-
Cont
o
AO
+
RO -
-
VA
G
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 VDDA or VSSA. The AO pin is selected
as an input when AI+ is tied to VDDA and the AI- pin is selected as an input when AI+ is tied to VSSA
(see Table 7.1).
Ant
-Aliasi
Filter
= 3400
Hz
i
-Aliasi
ng
Filter
fC = 200
Hz
High
Pas
Filt
Smooth
ngFilter
2
Hz
Filter
1
Smooth
ng
VAG
8
μ/A
Control
8
μ/A-
Control
+ -
- +
+
-
PAI
Ant
High Pass
-Aliasing
Filter
-
Aliasing
Filter
-
Filter
Smoothing
Filter
Smoothing
Receive Path
Transmit Path
D/A
Converter
+
-
A/D
Converter
fC= 3400Hz
C
= 200Hz
f
相關PDF資料
PDF描述
W6811IRG A/MU-LAW, PCM CODEC, PDSO24
W6811ISG A/MU-LAW, PCM CODEC, PDSO24
W6811IWG A/MU-LAW, PCM CODEC, PDSO24
W681511IS A/MU-LAW, PCM CODEC, PDSO20
W681512W A/MU-LAW, PCM CODEC, PDSO20
相關代理商/技術參數(shù)
參數(shù)描述
W6811IR 功能描述:IC VOICEBAND CODEC 5V/3V 24SSOP 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 供應商設備封裝:48-TQFN-EP(7x7) 包裝:帶卷 (TR)
W6811IRG 制造商:WINBOND 制造商全稱:Winbond 功能描述:SINGLE-CHANNEL VOICEBAND CODEC
W6811IS 功能描述:IC VOICEBAND CODEC 5V/3V 24SOP 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 供應商設備封裝:48-TQFN-EP(7x7) 包裝:帶卷 (TR)
W6811ISG 功能描述:IC VOICEBAND CODEC 5V/3V 24SOP 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 供應商設備封裝:48-TQFN-EP(7x7) 包裝:帶卷 (TR)
W6811ISG TR 功能描述:IC VOICEBAND CODEC 5V/3V 24SOP 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 供應商設備封裝:48-TQFN-EP(7x7) 包裝:帶卷 (TR)