參數(shù)資料
型號(hào)： AK4220
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 7:3 Audio Switch and 6:3 Video Switch
中文描述： 7:3音頻交換機(jī)和6點(diǎn)03分視頻開(kāi)關(guān)
文件頁(yè)數(shù)： 14/33頁(yè)
文件大?。?/td> 537K
代理商： AK4220
I
[AK4220]
MS0627-E-00
2007/05
- 14 -
OPERATION OVERVIEW
■
Power-down options
The AK4220 should be reset once by bringing PDN pin = “L” upon power-up.
■
Audio Bias Control Circuit
The AK4220 has an on-chip audio bias voltage control circuit. Bringing BIAS bit to “1”, the bias voltage (MUTET pin)
smoothly set from AVSS to AVDD/2(typ) by 150ms (typ, Note: 23). The change of BIAS bit from “1” to “0” also makes
smooth transient from AVDD/2(typ) to AVSS by 150ms (typ, Note: 23). This feature achieves pop noise free at
power-on/off.
Note: 23. AVDD=5.0V, the capacitor of MUTET pin is C=1uF. The rise and fall times are proportional to the voltage of
AVDD and the capacitor value of MUTET pin.
PDN pin
Audio bias level
BIAS bit
“1”
“0”
150ms (typ)
150ms (typ)
“0” (default)
Figure 13. BIAS bit
■
Audio Signal Input, Video Signal Input
1. Audio Signal Input
The ground noise can be cancelled by the differential input with the same ground for L and R channel. The output of LIN
and RIN are the same phase. LIN+1-7, RIN+1-7 and GND1-7 pins must be AC coupled using 0.47uF capacitor.
2. Video Signal Input
Tip Sync level is fixed by internal clamp circuit. VIN1-6 pins must be input through 0.47uF capacitor for AC coupling.
相關(guān)PDF資料
PDF描述
AK4220VQ 7:3 Audio Switch and 6:3 Video Switch
AK4250 Output Coupling Capacitor-less Video Amp with LPF
AK4250VU Output Coupling Capacitor-less Video Amp with LPF
AK4252 Output Coupling Capacitor-less Video Amp with LPF
AK4252VU Output Coupling Capacitor-less Video Amp with LPF
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4220VQ 制造商:AKM 制造商全稱(chēng):AKM 功能描述:7:3 Audio Switch and 6:3 Video Switch
AK4223 制造商:AKM 制造商全稱(chēng):AKM 功能描述:6:2 Audio Switch and 6:2 Video Switch
AK4223VQ 制造商:AKM 制造商全稱(chēng):AKM 功能描述:6:2 Audio Switch and 6:2 Video Switch
AK4250 制造商:AKM 制造商全稱(chēng):AKM 功能描述:1ch video amplifier with low pass filter
AK4250_10 制造商:AKM 制造商全稱(chēng):AKM 功能描述:Output Coupling Capacitor-less Video Amp with LPF
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