參數(shù)資料
型號: CDB42438
廠商: Cirrus Logic, Inc.
元件分類: Codec
英文描述: 108 dB, 192 kHz 4-in, 6-out TDM CODEC
中文描述: 108分貝192千赫4 - 6 -出的TDM編解碼器
文件頁數(shù): 50/62頁
文件大?。?/td> 1004K
代理商: CDB42438
50
DS673PP2
8.1.1
The passive filter implementation shown in Figure 21 will attenuate any noise energy at
6.144 MHz but will not provide optimum source impedance for the ADC modulators. Full analog
performance will therefore not be realized using a passive filter. Figure 21 illustrates the unity
gain, passive input filter solution. In this topology the distortion performance is affected, but the
dynamic range performance is not limited.
Passive Input Filter
8.1.2
Some applications may require signal attenuation prior to the ADC. The full-scale input voltage
will scale with the analog power supply voltage. For VA = 5.0 V, the full-scale input voltage is
approximately 2.8 Vpp, or 1 Vrms (most consumer audio line-level outputs range from 1.5 to
2 Vrms).
Figure 22 shows a passive input filter with 6 dB of signal attenuation. Due to the relatively high
input impedance on the analog inputs, the full distortion performance cannot be realized. Also,
the resistor divider circuit will determine the input impedance into the input filter. In the circuit
shown in Figure 22, the input impedance is approximately 5 k
.
By doubling the resistor values,
the input impedance will increase to 10 k
.
However, in this case the distortion performance will
drop due to the increase in series resistance on the analog inputs.
Passive Input Filter w/Attenuation
2700 pF
C0G
10
μ
F
100 k
150
AIN1+,2+,3+,4+
AIN1-,2-,3-,4-
ADC1-2
4.7
μ
F
Figure 21. Passive Input Filter
2700 pF
C0G
10
μ
F
2.5 k
AIN1+,2+,3+,4+
AIN1-,2-,3-,4-
ADC1-2
4.7
μ
F
2.5 k
Figure 22. Passive Input Filter w/Attenuation
相關(guān)PDF資料
PDF描述
CDB42448 108 dB, 192 kHz 6-in, 8-out CODEC
CDB4245 105 dB, 24-Bit, 192 kHz Streo Sudio CODEC
CDB42518 110 dB, 192 kHz 6-Ch Codec with S/PDIF Receiver
CDB42528 114 dB, 192 kHz 6-Ch Codec with S/PDIF Receiver
CDB4270 24-Bit, 192 kHz Stereo Audio CODEC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4244 制造商:Cirrus Logic 功能描述:EVAL BD 4 INPUT/ 4 OUTPUT CODEC - Boxed Product (Development Kits) 制造商:Cirrus Logic 功能描述:Eval Board
CDB42448 功能描述:音頻 IC 開發(fā)工具 Eval Bd 108dB 8-Ch Mult-Ch CODEC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4245 功能描述:音頻 IC 開發(fā)工具 Eval Bd 192kHz CODEC w/PGA & Input Mux RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42518 功能描述:音頻 IC 開發(fā)工具 Eval Bd RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42528 功能描述:音頻 IC 開發(fā)工具 Eval Bd RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V