參數(shù)資料
型號(hào)： CDB4271
廠商： Cirrus Logic, Inc.
元件分類： Codec
英文描述： 24-Bit, 192 kHz Stereo Audio CODEC
中文描述： 24位192千赫立體聲音頻CODEC
文件頁(yè)數(shù)： 34/53頁(yè)
文件大?。?/td> 1199K
代理商： CDB4271
CS4271
34
DS592F1
5.5
Mute Control
The Mute Control pins become active during power-up initialization, reset, muting, if the MCLK to LRCK ratio is in-
correct, and during power-down. The Auto-Mute function causes the MUTEC pin corresponding to an individual
channel to activate following the reception of 8192 consecutive audio samples of static 0 or -1 on the respective
channel. A single sample of non-zero data on this channel will cause the MUTEC pin to deactivate. In Control Port
Mode, however, auto-mute detection and muting can become dependent on either channel if the MuteB=A function
is enabled. The MUTEC pins are intended to be used as control for an external mute circuit in order to add off-chip
mute capability.
Use of the Mute Control function is not mandatory but recommended for designs requiring the absolute minimum in
extraneous clicks and pops. Also, use of the Mute Control function can enable the system designer to achieve idle
channel noise/signal-to-noise ratios which are only limited by the external mute circuit. The MUTEC pins are active-
low. See Figure 16 below for a suggested active-low mute circuit.
5.6
Synchronization of Multiple Devices
In systems where multiple ADCs are required, care must be taken to achieve simultaneous sampling. To ensure
synchronous sampling, the MCLK and LRCK must be the same for all of the CS4271’s in the system. If only one
MCLK source is needed, one solution is to place one CS4271 in Master Mode, and slave all of the other CS4271’s
to the one master. If multiple MCLK sources are needed, a possible solution would be to supply all clocks from the
same external source and time the CS4271 reset with the inactive edge of MCLK. This will ensure that all converters
begin sampling on the same clock edge.
5.7
Grounding and Power Supply Decoupling
As with any high resolution converter, the CS4271 requires careful attention to power supply and grounding arrange-
ments if its potential performance is to be realized. Figure 8 shows the recommended power arrangements, with VA
and VL connected to clean supplies. VD, which powers the digital filter, may be run from the system logic supply
(VL) or may be powered from the analog supply (VA) via a resistor. In this case, no additional devices should be
powered from VD. Power supply decoupling capacitors should be as near to the CS4271 as possible, with the low
value ceramic capacitor being the nearest. All signals, especially clocks, should be kept away from the VREF and
VCOM pins in order to avoid unwanted coupling into the modulators. The VREF and VCOM decoupling capacitors,
particularly the 0.1 μF, must be positioned to minimize the electrical path from VREF and AGND. The CDB4271
evaluation board demonstrates the optimum layout and power supply arrangements. To minimize digital noise, con-
nect the CS4271 digital outputs only to CMOS inputs.
LPF
+V
EE
-V
EE
560
Audio
Out
2 k
10 k
-V
EE
+V
A
MMUN2111LT1
AOUT
MUTEC
CS4272
AC
Couple
47 k
Figure 16. Suggested Active-Low Mute Circuit
相關(guān)PDF資料
PDF描述
CDB4272 24-Bit, 192 kHz Stereo Audio CODEC
CDB42L51 Silver Mica Capacitor; Capacitance:120pF; Capacitance Tolerance:+/- 5%; Series:CDV16; Voltage Rating:1000VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:5.94mm; Leaded Process Compatible:Yes RoHS Compliant: Yes
CDB42L50 Silver Mica Capacitor; Capacitance:100pF; Capacitance Tolerance:+/- 5%; Series:CDS; Voltage Rating:300VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:3mm; Leaded Process Compatible:No RoHS Compliant: No
CDB43122 122dB, 24-Bit, 192kHz DAC for Digital Audio
CDB4327 Low Cost, 20-Bit, Stereo, Audio D/A Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4272 功能描述:音頻 IC 開發(fā)工具 Eval Bd CS4272 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4299 功能描述:音頻 IC 開發(fā)工具 Eval Bd AC’97 CODEC w/SRC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42L50 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Low Voltage, Stereo CODEC with headphone Amp
CDB42L51 功能描述:音頻 IC 開發(fā)工具 Eval Bd Low-volt CODEC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB42L51/FAE 制造商:Cirrus Logic 功能描述:EVAL BOARD FOR THE CS42L51 PORTABLE STEREO CODEC - Bulk
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