參數(shù)資料
型號： ADAV801
廠商： Analog Devices, Inc.
元件分類： Codec
英文描述： Audio Codec for Recordable DVD
中文描述： 音頻編解碼器可刻錄DVD
文件頁數(shù)： 17/56頁
文件大?。?/td> 1405K
代理商： ADAV801
ADAV801
Selecting a Samp
The output sample rate of the ADC is always ADC MCLK/256,
as shown in Figure 23. By default, the ADC modulator runs at
ADC MCLK/2. When the ADC MCLK exceeds 12.288 MHz,
the ADC modulator should be set to run at ADC MCLK/4. This
is achieved by setting the AMC (ADC Modulator Clock) bit in
the ADC Control Register 1. To compensate for the reduced
modulator clock speed, a different set of filters are used in the
decimator section ensuring that the sample rate remains
the same.
Rev. 0 | Page 17 of 56
le Rate
-
ecause
ital
ut reduces the oversampling ratio,
cted
o generate a separate 12.288 MHz
eat
The AMC bit can also be used to boost the THD + N perform
ance of the ADC at the expense of dynamic range. The
improvement is typically 0.5 dB to 1.0 dB and works, b
selecting the lower modulator rate reduces the amount of dig
noise, improving THD + N, b
therefore reducing the dynamic range by a corresponding
amount.
For best performance of the ADC, avoid using similar
frequency clocks from separate sources in the ADAV801. For
example, running the ADC from a 12.288 MHz clock conne
to MCLKI and using the PLL t
clock for the DAC can reduce the performance of the ADC.
This is due to the interaction of the clocks, which generate b
frequencies that can affect the charge on the switch capacitors
of the analog inputs.
WAIT FOR SAMPLE
WAIT FOR SAMPLE
WAIT FOR SAMPLE
DECREASE GAIN BY 0.5dB
AND WAIT ATTACK TIME
IS SAMPLE
GREATER THAN ATTACK
THRESHOLD
IS
ABO
THRESHOLD
IS A RECOVERY
MODE ENABLED
SAMPLE
VE ATTACK
ARE ALL
SAMPLES BELOW
RECOVERY
THRESHOLD
HAS GAIN BEEN
FULLY RESTORED
YES
YES
NO
YES
YES
YES
NO
NO
NORMAL RECOVERY
INCREASE GAIN BY 0.5dB
WAIT RECOVERY TIME
LIMITED RECOVERY
ATTACK MODE
0
IS SAMPLE
ABOVE ATTACK
THRESHOLD
ARE ALL
SAMPLES BELOW
RECOVERY
THRESHOLD
HAS GAIN BEEN
FULLY RESTORED
IS GAINCNTR
AT MAXIMUM
YES
NO
NO
YES
YES
YES
NO
NO
INCREASE GAIN BY 0.5dB
NO
INCREMENT
GAINCNTR
NO
NO
NO
HAS RECOVERY
TIME BEEN
REACHED
HAS RECOVERY
TIME BEEN
REACHED
Figure 26. ALC Flow Diagram
相關(guān)PDF資料
PDF描述
ADAV801ASTZ Audio Codec for Recordable DVD
ADAV801ASTZ-REEL Audio Codec for Recordable DVD
ADC0800PCD ADC0800 8-Bit A/D Converter
ADC0800PD ADC0800 8-Bit A/D Converter
ADC0800 ECONOLINE: REC3-S_DRW(Z)/H* - 3W DIP Package- 1kVDC Isolation- Wide Input 2:1 & 4:1- Regulated Output- 100% Burned In- UL94V-0 Package Material- Continuous Short Circiut Protection- Efficiency to 80%
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADAV801AST 制造商:Analog Devices 功能描述:AUDIO CODEC FOR RECORDABLE DVD - Bulk
ADAV801ASTZ 功能描述:IC CODEC AUDIO R-DVD 3.3V 64LQFP 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)
ADAV801ASTZ-REEL 功能描述:IC CODEC AUDIO R-DVD 3.3V 64LQFP 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)
ADAV802AST 制造商:Analog Devices 功能描述:AUDIO CODEC FOR RECORDABLE DVD - Bulk
ADAV802ASTZ 制造商:Analog Devices 功能描述:
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