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參數(shù)資料
| 型號： | AK4366 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Low Power 24-Bit 2ch DAC with HP-AMP |
| 中文描述： | 低功耗24位2通道DAC，具有惠普腺苷 |
| 文件頁數(shù)： | 16/31頁 |
| 文件大?。?/td> | 266K |
| 代理商： | AK4366 |
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ASAHI KASEI
AKM CONFIDENTIAL
[AK4366]
REV 0.6
2003/3
- 16 -
n
Digital Attenuator
The AK4366 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 5). At
DATTC= “1”, ATTL7-0 bits control both Lch and Rch attenuation levels. At DATTC= “0”, ATTL7-0 bits control the Lch
level and ATTR7-0 bits control the Rch level. In parallel mode (P/S= “H”), digital attenuator is fixed to 0dB. When HPM=
“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 5. 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 6). When ATS=
“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 6. Transition time between set values of ATT7-0 bits
Attenuation
0dB
Default
:
:
1 step
4/fs
29/fs
Default
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相關(guān)代理商/技術(shù)參數(shù) |
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