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參數(shù)資料
| 型號： | AK4367VN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Low Power 24-Bit 2ch DAC with HP-AMP & Output Mixer |
| 中文描述： | 低功耗24位2通道DAC，具有惠普腺苷 |
| 文件頁數(shù)： | 16/38頁 |
| 文件大?。?/td> | 455K |
| 代理商： | AK4367VN |
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ASAHI KASEI
[AK4367]
MS0247-E-02
2005/10
- 16 -
Digital Attenuator
The AK4367 has a channel-independent digital attenuator (256 levels, 0.5dB step). This digital attenuator is placed before
the D/A converter. ATTL/R7-0 bits set the attenuation level (0dB to
127dB or MUTE) for each channel (Table 4). At
DATTC bit = “1”, ATTL7-0 bits control both Lch and Rch attenuation levels. At DATTC bit = “0”, ATTL7-0 bits control
the Lch level and ATTR7-0 bits control the Rch level. When HPM bit = “1”, (L+R)/2 summation is done after volume
control.
ATTL7-0
ATTR7-0
FFH
FEH
0.5dB
FDH
1.0dB
FCH
1.5dB
:
:
02H
126.5dB
01H
127.0dB
00H
MUTE (
∞
)
Table 4. Digital Volume ATT values
The ATS bit sets the transition time between set values of ATT7-0 bits as either 1061/fs or 7424/fs (Table 5). When ATS
bit = “0”, a soft transition between the set values occurs(1062 levels). It takes 1061/fs (24ms@fs=44.1kHz) from
FFH(0dB) to 00H(MUTE). The ATTs are 00H when the PMDAC bit is “0”. When the PMDAC returns to “1”, the ATTs
fade to their current value. Digital attenuator is independent of the soft mute function.
ATT speed
ATS
0dB to MUTE
0
1061/fs
1
7424/fs
Table 5. Transition time between set values of ATT7-0 bits
MOUT volume is controlled by ATTM3-0 bits when MMUTE bit = “0” (Table 6). Pop noise occurs when ATT3-0 bits
are changed.
MMUTE
ATTM3-0
0FH
0EH
0DH
0CH
:
:
01H
00H
1
x
Table 6. MOUT Volume ATT values
Attenuation
0dB
Default
:
:
1 step
4/fs
29/fs
Default
Attenuation
0dB
2dB
4dB
6dB
:
:
28dB
30dB
MUTE
Default
0
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PDF描述 |
|---|---|
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4367VNP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
| AK4368 | 制造商:AKM 制造商全稱:AKM 功能描述:PLL & HP-AMP DAC |
| AK4368192D | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK4368192G | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK4368192S | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
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