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參數(shù)資料
| 型號： | AK4560A |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16bit CODEC with ALC and MIC/HP/SPK-Amps |
| 中文描述： | 16位編解碼器ALC和麥克風(fēng)/惠普/胰腎聯(lián)合移植，放大器 |
| 文件頁數(shù)： | 31/47頁 |
| 文件大小： | 339K |
| 代理商： | AK4560A |
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ASAHI KASEI
[AK4560A]
MS0028-E-00
2000/05
- 31 -
n
Analog Volume (OPGA)
The AK4560A includes the 0dB
～
-50dB & MUTE analog volume with zero crossing detection for headphone and
speaker. Zero crossing is detected on L/R channels independently. Zero crossing timeout (To) is proportional to sampling
rate. To=512/fs@fs=48kHz=10.7ms.
OPGA is not written during counting zero crossing timers. In case of writing control register continually, the change of
OPGA should be written after zero crossing timeout and over. If OPGA is changed by writing to control register before
zero crossing detection, OPGA value of L/R channels may not give a difference level.
Usually, to remove the offset of DAC, it needs a capacitor (Ca) between LOUT2/ROUT2 and OPGL/OPGR. The cut-off
frequency is decided by capacity of Ca and input impedance (typ. 110k
) of OPGL/OPGR.
Power supply for analog volume enables when speaker or headphone of power management bits is “1”. (SPKP bit = “1”
or HPP bit = “1”)
The initial value is 0dB at exiting power-down.
Figure 17. Connect LOUT2/ROUT2 with OPGL/OPGR
n
LINE input
In case of LINE input, input impedance of LIN/RIN is 184k
(typ.) and centered around the VCOM voltage. When input
voltage is +2dBV, LIN/RIN pins should be input to –5.5dBV@VA=2.8V and less after dividing resistors externally.
When LIN bit is “1”, LINE input is selected. Then IPGA table of ALC1 is changed to LINE side.
Figure 18. Example of LINEIN at VA=2.8V
OPGA
LOUT2/ROUT2
Ca
typ.110k
OPGL/OPGR
ALC1
LINE input
typ.184k
LIN/RIN
22k
27k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4560AVQ | 16bit CODEC with ALC and MIC/HP/SPK-Amps |
| AK4561 | 16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4561VQ | 16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4562 | LOW POWER 20BIT CODEC WITH PGA |
| AK4562VN | LOW POWER 20BIT CODEC WITH PGA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4560AVQ | 制造商:AKM 制造商全稱:AKM 功能描述:16bit CODEC with ALC and MIC/HP/SPK-Amps |
| AK4561 | 制造商:AKM 制造商全稱:AKM 功能描述:16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4561VQ | 制造商:AKM 制造商全稱:AKM 功能描述:16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4562 | 制造商:AKM 制造商全稱:AKM 功能描述:EVALUATION BOARD REV.A FOR AK4562 |
| AK4562VN | 制造商:AKM 制造商全稱:AKM 功能描述:LOW POWER 20BIT CODEC WITH PGA |
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