參數(shù)資料
型號(hào)： CDB4340A
廠商： Cirrus Logic, Inc.
英文描述： 24-Bit, 192 kHz Stereo DAC for Audio
中文描述： 24位192千赫立體聲DAC音頻
文件頁(yè)數(shù)： 9/20頁(yè)
文件大?。?/td> 628K
代理商： CDB4340A
CS4340A
DS590PP2
9
3.6
Reliable power-up can be accomplished by keeping the device in reset until the power supply and config-
uration pins are stable, and the clocks are locked to the appropriate frequencies discussed in section 3.3. It
is also recommended that reset be enabled if the analog supply drops below the minimum specified oper-
ating voltage to prevent power glitch related issues.
Popguard
Transient Control
The CS4340A uses Popguard
technology to minimize the effects of output transients during power-up
and power-down. This technology, when used with external DC-blocking capacitors in series with the au-
dio outputs, minimizesthe audio transients commonly produced by single-ended single-supply converters.
It is activated inside the DAC when RST is enabled/disabled and requires no other external control, aside
from choosing the appropriate DC-blocking capacitors.
Power-up Sequence
3.7
3.7.1
Power-up
When the device is initially powered-up, the audio outputs, AOUTL and AOUTR, are clamped to
AGND. Following a delay of approximately 1000 sample periods, each output begins to ramp to-
ward the quiescent voltage. Approximately 10,000 LRCK cycles later, the outputs reach V
Q
and
audio output begins.This gradualvoltageramping allowstimefor theexternal DC-blockingcapac-
itors to charge to the quiescent voltage, minimizing the power-up transient.
3.7.2
Power-down
To prevent transients at power-down, the device must first enter its power-down state by enabling
RST. When this occurs, audio output ceases and the internal output buffers are disconnected from
AOUTL and AOUTR. In their place, a soft-start current sink is substituted which allows the DC-
blocking capacitors to slowly discharge. Once this charge is dissipated, the power to the device
may be turned off and the system is ready for the next power-on.
3.7.3
Discharge Time
To prevent an audio transient at the next power-on, it is necessary to ensure that the DC-blocking
capacitors have fully discharged before turning on the power or exiting the power-down state. If
not, a transient will occur when theaudio outputs are initially clamped to AGND. The time that the
device must remain in the power-down state is related to the valueof the DC-blocking capacitance.
For example, with a 3.3 μF capacitor, the minimum power-down time will be approximately
0.4 seconds.
相關(guān)PDF資料
PDF描述
CDB4340 24-Bit, 96 kHz Stereo DAC for Audio
CDB4341A 24-Bit, 192 kHz Stereo DAC with Volume Control
CDB4341 24-Bit, 96 kHz Stereo DAC with Volume Control
CDB4351 192 kHz STEREO DAC WITH 2 Vrms LINE OUT
CDB4360 24-Bit, 192 kHz 6 Channel D/A Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDB4341 功能描述:音頻 IC 開(kāi)發(fā)工具 Eval Bd 101dB 96kHz DAC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4341A 功能描述:音頻 IC 開(kāi)發(fā)工具 Eval Bd RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4344 功能描述:音頻 IC 開(kāi)發(fā)工具 Eval Bd 10Pin 192kHz DAC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4349 功能描述:音頻 IC 開(kāi)發(fā)工具 Eval Bd 192kHz Str DAC w/VC 1Vrms @3.3V RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
CDB4350 功能描述:音頻 IC 開(kāi)發(fā)工具 Eval Bd 105dB 192kHz DAC w/pull RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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