參數(shù)資料
型號(hào)： AK4632VN
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP
中文描述： 16位ツヒALC的單聲道編解碼器
文件頁數(shù)： 37/70頁
文件大小： 639K
代理商： AK4632VN
ASAHI KASEI
[AK4632]
MS0396-E-00
2005/06
- 37 -
SPP
SPK-Amp
SPN
≥
10
≥
10
ZD
ZD
Figure 35. Circuit of Speaker Output(Load Capacitance > 30pF)
<Control Sequence of Speaker Amp>
Speaker blocks (MOUT, ALC2 and Speaker-amp) can be powered-up/down by controlling the PMSPK bit. When the
PMSPK bit is
“
0
”
, the MOUT, SPP and SPN pins are placed in a Hi-Z state.
When the PMSPK bit is
“
1
”
and SPPS bit is
“
0
”
, the Speaker-amp enters power-save-mode. In this mode, the SPP pin is
placed in a Hi-Z state and the SPN pin goes to SVDD/2 voltage. And then the Speaker output gradually changes to the
SVDD/2 voltage and this mode can reduce pop noise at power-up. When the AK4632 is powered-down, pop noise can be
also reduced by first entering power-save-mode.
PMSPK bit
SPPS bit
SPP pin
SPN pin
SVDD/2
SVDD/2
Hi-Z
Hi-Z
Hi-Z
Hi-Z
>t1(Note)
>0
Figure 36. Power-up/Power-down Timing for Speaker-Amp
(Note)
“
t1
”
depends on the time constant of input resistance of MIN and capacitor between MOUT pin and MIN pin.
If
S
peaker-Amp output is enabled before MIN-Amp (ALC2) becomes stable, pop noise may occur.
Ex) C of MOUT pin – MIN pin = 0.1
μ
F, Input resistance of MIN pin = 36k
(Max)
: t1 = 5
τ
= 18ms
C of MOUT pin – MIN pin and the Input resistance(Rin) of MIN pin compose of HPF which cut off
frequency(fc) are the followings.
fc = 66Hz@Rin=24k
(typ), 133Hz@Rin=12k
(min), 44Hz@Rin=36k
(max)
相關(guān)PDF資料
PDF描述
AK4633VN 16bit mono CODEC with MIC/SPK amplifier.
AK4633 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4640 16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4640VG 16BIT CODEC WITH MIC /HP/SPK-AMPl
AK4640VN 16BIT CODEC WITH MIC /HP/SPK-AMPl
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4633 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP
AK4633ENP-L 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A
AK4633VN 制造商:AKM 制造商全稱:AKM 功能描述:16bit mono CODEC with MIC/SPK amplifier.
AK4633VNP-L 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A
AK4634 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP
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