參數(shù)資料
型號： 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)： 41/70頁
文件大小： 639K
代理商： AK4632VN
ASAHI KASEI
[AK4632]
MS0396-E-00
2005/06
- 41 -
Video Block
Video-Amp has a drivability for a load resistance of 150
. The AK4632 has a composite input and output. A Low Pass
Filter(LPF) and Gain Control Amp(GCA) are integrated and both DC output and Sag Compensation circuit are supported
as shown in Figure 41 and Figure 42. The capacitance for Sag Compensation circuit is 100
μ
F+2.2
μ
F or 47
μ
F+1.0
μ
F.
When DC output is used, VOUT pin and VSAG pin must be shorted. The output clamp voltage is 150mV(typ) at DC
output. SAGC1-0 bits and VVDD voltage should be set as shown in Table 23. Table 25 shows the gain and step of the
gain control. The gain is set by VGCA4-0 bits. PMV bit controls the power up and down of the video block. VOUT pin
outputs AVSS level at PMV bit =
“
1
”
.
YIN
VOUT
CLAMP
75
VSAG
LPF
GCA
C1
C2
+6dB
-1dB ~ +10.5dB
Step 0.5dB
(C1=100
μ
F, C2=2.2
μ
F) or (C1=47
μ
F, C2=1.0
μ
F)
Figure 41. Video block (using Sag Compensation circuit)
YIN
VOUT
CLAMP
75
VSAG
LPF
GCA
+6dB
-1dB ~ +10.5dB
Step 0.5dB
Figure 42. Video block (at DC Output))
SAGC1 bit
0
0
1
1
SAGC0 bit
0
1
0
1
VVDD voltage
2.8 V
≤
VVDD
≤
3.6V
Output Circuit
DC output
Default
Not Available
2.85V
≤
VVDD < 4.75V
4.5 V
≤
VVDD < 5.25V
Table 23. Setting of VVDD and video output circuit.
Sag compensation
Sag compensation
Output Circuit
VVDD voltage
2.8 V
≤
VVDD
≤
3.6V
3.135 V
≤
VVDD
≤
5.25V
2.85V
≤
VVDD < 3.135 V
3.135 V
≤
VVDD
≤
5.25V
2.85V
≤
VVDD < 3.135 V
GCA setting
0dB
0dB
-1dB (Note)
0dB
-1dB (Note)
DC output
Sag compensation 100
μ
F+2.2
μ
F
Sag compensation 47
μ
F+1.0
μ
F
Note : When the sag compensation circuit is used at less than 3.135V of VVDD, the GCA should be set to -1dB in
order to avoid clipping of output video signal. Note that the video will become dark at that time.
Table 24. Gain compensation
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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