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參數(shù)資料
| 型號： | AK4342EN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 24-Bit Stereo DAC with HP-AMP & 2V Line-Out |
| 中文描述： | 24位立體聲DAC惠普腺苷 |
| 文件頁數(shù)： | 21/43頁 |
| 文件大?。?/td> | 580K |
| 代理商： | AK4342EN |
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ASAHI KASEI
[AK4342]
MS0506-E-02
2006/07
- 21 -
Soft Mute
Soft mute operation is performed in the digital domain of the DAC input. When the SMUTE bit goes to “1”, the output
signal is attenuated by
∞
during ATT_DATA
×
ATT transition time (Figure 16) from the current ATT level. When
SMUTE bit is returned to “0”, the mute is cancelled and the output attenuation gradually changes to the ATT level during
ATT_DATA
×
ATT transition time. If the soft mute is cancelled before attenuating to
∞
after starting the operation, the
attenuation is discontinued and returned to ATT level by the same cycle. The soft mute is effective for changing the signal
source without stopping the signal transmission.
SMUTE bit
Attenuation
STS1-0 bits
(1)
ATT Level
-
∞
Analog Output
GD
(2)
GD
(3)
STS1-0 bits
(1)
Figure 16. Soft Mute Function
Notes:
(1) ATT_DATA
×
ATT transition time. For example, this time is 510LRCK cycles at normal speed mode and STS1-0
bit = “01” and ATT_DATA = “128”.
(2) Analog output corresponding to digital input has group delay (GD).
(3) If the soft mute is cancelled before attenuating to
∞
after starting the operation, the attenuation is discontinued
and returned to ATT level by the same cycle.
De-emphasis Filter
The AK4342 includes a digital de-emphasis filter (tc = 50/15
μ
s) via an IIR filter. This filter corresponds to three
frequencies (32kHz, 44.1kHz and 48kHz). This setting is done via control register (DEM1-0 bits). (See Table 8). When
the AK4342 is half speed mode or double speed mode, the DEM1-0 bits are ignored and the de-emphasis filter is disabled.
DEM1 bit
DEM0 bit
0
0
0
1
1
0
1
1
Table 8. De-emphasis Filter Frequency control
De-emphasis
44.1kHz
OFF
48kHz
32kHz
Default
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4343 | Stereo DAC with HP/RCV/SPK-AMP |
| AK4343EN | Stereo DAC with HP/RCV/SPK-AMP |
| AK4345 | 100dB 96kHz 24-Bit Stereo 3.3V ツヒ DAC with DIT |
| AK4345ET | 100dB 96kHz 24-Bit Stereo 3.3V ツヒ DAC with DIT |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4342EN-L | 制造商:ASAHI 功能描述: |
| AK4342ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
| AK4343 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo DAC with built-in HP/RCV/SPK amplifier |
| AK434-3 | 功能描述:CABLE CENTRONICS F-F 3M RoHS:否 類別:電纜組件 >> D形，Centronics 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 配置:VHDCI 68 位置公型至公型 長度:10.00'（3.05m） 纜線類型:圓形 - 黑色 屏蔽:屏蔽 樣式:SCSI Ultra 2 |
| AK4343EN | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo DAC with HP/RCV/SPK-AMP |
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