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參數(shù)資料
| 型號(hào)： | AK4643EN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | Stereo CODEC with MIC/HP/RCV/SPK-AMP |
| 中文描述： | 立體聲編解碼器麥克風(fēng)/惠普/垃圾車/胰腎聯(lián)合移植腺苷 |
| 文件頁數(shù)： | 88/104頁 |
| 文件大?。?/td> | 926K |
| 代理商： | AK4643EN |
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ASAHI KASEI
[AK4643]
MS0476-E-01
2006/10
- 88 -
1.
Grounding and Power Supply Decoupling
The AK4643 requires careful attention to power supply and grounding arrangements. AVDD, DVDD and HVDD are
usually supplied from the system’s analog supply. If AVDD, DVDD and HVDD are supplied separately, the power-up
sequence is not critical. AVSS, DVSS and HVSS of the AK4643 should be connected to the analog ground plane. System
analog ground and digital ground should be connected together near to where the supplies are brought onto the printed
circuit board. Decoupling capacitors should be as near to the AK4643 as possible, with the small value ceramic capacitor
being the nearest.
2. Voltage Reference
VCOM is a signal ground of this chip. A 2.2
μ
F electrolytic capacitor in parallel with a 0.1
μ
F ceramic capacitor attached
to the VCOM pin eliminates the effects of high frequency noise. No load current may be drawn from the VCOM pin. All
signals, especially clocks, should be kept away from the VCOM pin in order to avoid unwanted coupling into the
AK4643.
3. Analog Inputs
The Mic, Line and MIN inputs are single-ended. The input signal range scales with nominally at 0.06 x AVDD Vpp(typ)
@MGAIN1-0 bits = “01”, 0.03 x AVDD Vpp(typ) @MGAIN1-0 bits = “10”, 0.015 x AVDD Vpp(typ) @MGAIN1-0
bits = “11” or 0.6 x AVDD Vpp(typ) @MGAIN1-0 bits = “00” for the Mic/Line input and 0.6 x AVDD Vpp (typ) for the
MIN input, centered around the internal common voltage (0.45 x AVDD). Usually the input signal is AC coupled using a
capacitor. The cut-off frequency is fc = (1/2
π
RC). The AK4643 can accept input voltages from AVSS to AVDD.
4. Analog Outputs
The input data format for the DAC is 2’s complement. The output voltage is a positive full scale for 7FFFH(@16bit) and
a negative full scale for 8000H(@16bit). Stereo Line Output and Receiver Output are centered at 0.45 x AVDD. The
Headphone-Amp and Speaker-Amp outputs are centered at HVDD/2.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4645EZ | Stereo CODEC with MIC/HP-AMP |
| AK4645 | Stereo CODEC with MIC/HP-AMP |
| AK4646EZ | Stereo CODEC with MIC/SPK-AMP |
| AK4646 | Stereo CODEC with MIC/SPK-AMP |
| AK4646EN | Stereo CODEC with MIC/SPK-AMP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4644 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with built-in MIC/HP/RCV amplifier |
| AK4644EN | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/RCV-AMP |
| AK4645 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP |
| AK4645EN | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP |
| AK4645ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述: |
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