參數(shù)資料
型號: CDB42448
廠商: Cirrus Logic, Inc.
元件分類: Codec
英文描述: 108 dB, 192 kHz 6-in, 8-out CODEC
中文描述: 108分貝192千赫6 - 8 -出編解碼器
文件頁數(shù): 57/70頁
文件大?。?/td> 1146K
代理商: CDB42448
DS648PP2
57
7.1.1
The passive filter implementation shown in Figure 28 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 28 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
7.1.2
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 29 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 29, 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
AIN5A,6A
AIN5B,6B
ADC3
2700 pF
C0G
10
μ
F
100 k
150
2700 pF
C0G
10
μ
F
100 k
150
Figure 28. Passive Input Filter
相關PDF資料
PDF描述
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
CDB4271 24-Bit, 192 kHz Stereo Audio CODEC
相關代理商/技術參數(shù)
參數(shù)描述
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
CDB4265 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
CDB4270 功能描述:音頻 IC 開發(fā)工具 Eval Bd 105dB 192kHz 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