參數(shù)資料
型號(hào)： 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(yè)數(shù)： 21/31頁(yè)
文件大?。?/td> 266K
代理商： AK4366
ASAHI KASEI
AKM CONFIDENTIAL
[AK4366]
REV 0.6
2003/3
- 21 -
n
Power-Up/Down Sequence
1) Parallel mode (P/S= “H”)
Power Supply
PDN pin
Clock Input
(3) >2ms
SDTI pin
DAC Internal
State
PD
Normal Operation
HPL/R pin
MUTEN pin
PD
Normal Operation
(4)
(4)
(5)
Don’t care
Don’t care
(6)
(1)
>150ns
PD
(5) GD
(4)
(4)
(2)
(3) >2ms
(5)
(5) GD
Figure 16. Power-up/down sequence of DAC and HP-amp
(1) PDN pin should be set to “H” at least 150ns after the power is supplied.
(2) External clocks (MCLK, BICK, LRCK) are needed to operate DAC. When PDN= “L”, these clocks can be stopped.
Headphone amp can operate without these clocks.
(3) MUTEN pin should be set to “H” at least 2ms after PDN pin goes to “H”.
(4) Rise/Fall time of headphone amp is determined by external capacitor (C) of MUTET pin. Time constant is 100k x C.
When C=1μF, time constant is 100ms.
PDN pin should be set to “L” after HPL and HPR pins go to VSS.
(5) Analog output corresponding to digital input has the group delay (GD) of 20.8/fs (=472μs@fs=44.1kHz).
(6) Power supply should be switched off after headphone amp is powered down (HPL/R pins become “L”).
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