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參數(shù)資料
| 型號： | AK4360 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Low Power 2ch ΔΣ DAC with HP-AMP(帶耳機(jī)放大器的20位低電壓低功耗立體聲D/A轉(zhuǎn)換器) |
| 中文描述： | 低功耗2通道ΔΣDAC，帶有惠普腺苷（帶耳機(jī)放大器的20位低電壓低功耗立體聲的D / A轉(zhuǎn)換器） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 81K |
| 代理商： | AK4360 |
ASAHI KASEI
[AK4360]
MS0072-E-00
2001/01
- 12 -
n
Mute Function
In the normal operation (PDN = “H” and MUTEN = “H”), the analog outputs do the gain mute operation and level mute
operation when MUTEN pin goes “L”, the analog outputs are muted to HPGND (0V) finally. The level mute operation is
fixed to 1024/fs. The gain mute time is set by MT0 and MT1 pins. If the sampling frequency is slow, the gain mute time can
be shortened by the set of MT0 and MT1 pins (Refer to Table 4). Figure 8 shows the mute on/off timing example. *fs
means sampling frequency.
When PDN pin goes “H” and MUTEN pin goes “L”, HP-AMP is only powered-down. And when PDN and MUTEN pins
go “L”, HP-AMP and DAC are powered-down. Then, power supply current about a few 10
μ
A is flowed to internal mute
control circuit from HPVCC power supply. (Refer to Table 5.)
MT1
L
L
H
H
MT0
L
H
L
H
Gain Mute Time
x 1 (=21845/fs)
x 1/2 (=10923/fs)
x 1/4 (=5461/fs)
x 3/4 (=16384/fs)
Table 4. Mute Time Setting
Level Mute Time
1024/fs
1024/fs
1024/fs
1024fs
Total Time
22869/fs
11947/fs
6485/fs
17408/fs
Mode
1
2
3
4
PDNpin
H
H
L
L
MUTEN pin
H
L
L
H
Table 5. About PDN and MUTEN pins
DAC State
Normal operation
Normal operation
Power-down
HP-Amp State
Normal operation
Power-down
Power-down
Inhibit
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