參數(shù)資料
型號： AK4646EZ
廠商： ASAHI KASEI POWER DEVICES CORP
元件分類： 消費家電
英文描述： Stereo CODEC with MIC/SPK-AMP
中文描述： SPECIALTY CONSUMER CIRCUIT, PQCC32
封裝： 4 X 4 MM, 0.40 MM PITCH, LEAD FREE, PLASTIC, QFN-32
文件頁數(shù)： 66/78頁
文件大?。?/td> 808K
代理商： AK4646EZ
[AK4646EZ]
MS0630-E-00
2007/06
- 66 -
1.
Grounding and Power Supply Decoupling
The AK4646 requires careful attention to power supply and grounding arrangements. AVDD, DVDD and SVDD are
usually supplied from the system’s analog supply. If AVDD, DVDD and SVDD are supplied separately, the power-up
sequence is not critical. AVSS, DVSS and SVSS of the AK4646 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 AK4646 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 should be
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
AK4646.
3. Analog Inputs
The Mic, Line and MIN inputs are single-ended. The inputs signal range scales with nominally at 0.0636 x AVDD Vpp
(typ) for the Mic input and 0.636 x AVDD Vpp (typ) for the MIN input, centered around the internal common voltage (0.5
x AVDD). Usually the input signal is AC coupled using a capacitor. The cut-off frequency is fc = 1/ (2
π
RC). The AK4646
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). The ideal output is VCOM voltage for 0000H (@16bit). Stereo Line Output is
centered at 0.5 x AVDD (typ). The Headphone-Amp and Speaker-Amp outputs are centered at SVDD/2.
相關PDF資料
PDF描述
AK4646 Stereo CODEC with MIC/SPK-AMP
AK4646EN Stereo CODEC with MIC/SPK-AMP
AK4647 Stereo CODEC with MIC/HP-AMP
AK4647VN Stereo CODEC with MIC/HP-AMP
AK4648 Stereo CODEC with MIC/HP/SPK-AMP
相關代理商/技術參數(shù)
參數(shù)描述
AK4647 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4647VN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4647VQ 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4648 制造商:AKM 制造商全稱:AKM 功能描述:stereo CODEC with MIC/HP/SPK amplifier
AK4648EC 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/SPK-AMP
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