參數(shù)資料
型號(hào)： WM8728
廠商： Wolfson Microelectronics
英文描述： 24-bit, 192kHz Stereo DAC with Volume Control and DSD Support
中文描述： 24位，192kHz立體聲DAC，具有音量控制和渠務(wù)署支持
文件頁(yè)數(shù)： 19/28頁(yè)
文件大?。?/td> 266K
代理商： WM8728
WM8728
Product Preview
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
19
ATTENUATION CONTROL
Each DAC channel can be attenuated digitally before being applied to the digital filter. Attenuation
is 0dB by default but can be set between 0 and 127.5dB in 0.5dB steps using the 8 Attenuation
control bits. All attenuation registers are double latched allowing new values to be pre-latched to
both channels before being updated synchronously. Setting the UPDATE bit on any attenuation
write will cause all pre-latched values to be
immediately
applied to the DAC channels.
REGISTER
ADDRESS
0000
Attenuation
DACL
BITS
LABEL
DEFAULT
DESCRIPTION
[7:0]
LAT[7:0]
11111111 (0dB)
Attenuation data for Left channel DACL in 0.5dB steps.
8
UPDATEL
0
Controls simultaneous update of all Attenuation Latches
0: Store DACL in intermediate latch (no change to output)
1: Store DACL and update attenuation on all channels.
Attenuation data for Right channel DACR in 0.5dB steps.
[7:0]
RAT[7:0]
11111111 (0dB)
0001
Attenuation
DACR
8
UPDATER
0
Controls simultaneous update of all Attenuation Latches
0: Store DACR in intermediate latch (no change to output)
1: Store DACR and update attenuation on all channels.
Table 8 Attenuation Register Map
Note:
1.
The UPDATE bit is not latched. If UPDATE=0, the Attenuation value will be written to the pre-latch but not applied to the
relevant DAC. If UPDATE=1, all pre-latched values and the current value being written will be applied on the next input
sample.
2.
Care should be used in reducing the attenuation as rapid large volume changes can introduce zipper noise.
DAC OUTPUT ATTENUATION
Registers LAT and RAT control the left and right channel attenuation. Table 9 shows how the
attenuation levels are selected from the 8-bit words.
XAT[7:0]
00(hex)
01(hex)
:
:
:
FE(hex)
FF(hex)
ATTENUATION LEVEL
∞
dB (mute)
127.5dB
:
:
:
0.5dB
0dB
Table 9 Attenuation Control Levels
MUTE MODES
Setting the MUT register bit will apply a
’
soft
’
mute to the input of the digital filters:
REGISTER ADDRESS
0010
DAC Control
BIT
0
LABEL
MUT
DEFAULT
0
DESCRIPTION
Soft Mute select
0 : Normal Operation
1: Soft mute all channels
Table 10 Mute control
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
WM8728_04 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:24-bit, 192kHz Stereo DAC with Volume Control
WM8728_12 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:24-bit, 192kHz Stereo DAC with Volume Control
WM8728-6059-DS20-M-S 功能描述:音頻 IC 開(kāi)發(fā)工具 WM8728 MINI Eval Board System 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
WM8728SEDS 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類(lèi)型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
WM8728SEDS/R 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類(lèi)型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
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