參數(shù)資料
型號(hào)： AK4370VN
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 24-Bit 2ch DAC with HP-AMP & Output Mixer
中文描述： 24位2通道DAC，具有惠普腺苷
文件頁(yè)數(shù)： 21/49頁(yè)
文件大小： 695K
代理商： AK4370VN
ASAHI KASEI
[AK4370]
MS0595-E-00
2007/03
- 21 -
■
Digital Attenuator
The AK4370 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 7). At
DATTC bit = “1”, ATTL7-0 bits control both channel’s attenuation levels. At DATTC bit = “0”, ATTL7-0 bits control
the left channel level and ATTR7-0 bits control the right channel level.
ATTL7-0
ATTR7-0
FFH
FEH
0.5dB
FDH
1.0dB
FCH
1.5dB
:
:
02H
126.5dB
01H
127.0dB
00H
MUTE (
∞
)
Table 7. 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 8). When the
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. The digital attenuator is independent of the soft mute function.
ATT speed
ATS
0dB to MUTE
0
1061/fs
1
7424/fs
Table 8. Transition time between set values of ATT7-0 bits
Attenuation
0dB
Default
:
:
1 step
4/fs
29/fs
Default
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4371 制造商:AKM 制造商全稱:AKM 功能描述:24bit DAC with Headphone Amplifier
AK4371VN 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP
AK4372 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP
AK4372ECB 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP
AK4372VCB 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP
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