參數(shù)資料
型號： AK4368EG
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： DAC with built-in PLL & HP-AMP
中文描述： DAC，帶有內(nèi)置的鎖相環(huán)
文件頁數(shù)： 40/60頁
文件大?。?/td> 817K
代理商： AK4368EG
ASAHI KASEI
[AK4368EG]
MS0529-E-00
2006/07
- 40 -
3) LIN/RIN/MIN
→
HP-Amp
Power Supply
PDN pin
PMVCM bit
HPL/R pins
(7)
(7)
(8)
LIN/RIN/MIN pins
(4)
(Hi-Z)
(Hi-Z)
PMHPL/R bits
Don’t care
(1) >150ns
(2) >0s
MUTEN bit
LINHL, MINHL,
RINHR, MINHR bits
(3) >0s
(5) >0s
3D1-0 bits
(when 3D is used)
(6) >2ms(at 3D OFF), >50ms(at 3D ON)
“00” (3D OFF)
“01”, “10” or “11” (3D ON)
“00”
“01”, “10” or “11”
(6) >2ms or >50ms
Figure 32. Power-up/down sequence of LIN/RIN/MIN and HP-amp
(1) PDN pin should be set to “H” at least 150ns after power is supplied. MCKI, BICK and LRCK can be stopped when
DAC is not used.
(2) PMVCM bit should be changed to “1” after PDN pin goes “H”.
(3) LINHL, MINHL, RINHR and MINHR bits should be changed to “1” after PMVCM bit is changed to “1”.
(4) When LINHL, MINHL, RINHR or MINHR bit is changed to “1”, LIN, RIN or MIN pin is biased to 0.475 x AVDD.
(5) When the 3D function is used, 3D1-0 bits should be changed to “01”, “10” or “11” after LINHL, MINHL, RINHR
and MINHR bits are changed to “1”.(refer to Table 25)
(6) When the 3D function is not used, PMHPL, PMHPR and MUTEN bits should be changed to “1” at least 2ms (in case
external capacitance at VCOM pin is 2.2
μ
F) after LINHL, MINHL, RINHR and MINHR bits are changed to “1”.
When the 3D function is used, PMHPL, PMHPR and MUTEN bits should be changed to “1” at least 50ms after
3D1-0 bits are changed to “01”, “10” or “11”.
(7) Rise time of the headphone-amp is determined by an external capacitor (C) of MUTET pin. The rise time up to
VCOM/2 is t
r
= 70k x C(typ). When C=1
μ
F, t
r
= 70ms(typ).
(8) Fall time of the headphone-amp is determined by an external capacitor (C) of MUTET pin. The fall time down to
VCOM/2 is t
f
= 60k x C(typ). When C=1
μ
F, t
f
= 60ms(typ).
PMHPL and PMHPR bits should be changed to “0” after HPL and HPR pins go to HVSS. After that, LINHL,
MINHL, RINHR and MINHR bits should be changed to “0”.
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