- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385094 > AK4665AEN (Asahi Kasei Microsystems Co.,Ltd) 20-Bit Stereo CODEC with MIC/HP-AMP PDF資料下載
參數(shù)資料
| 型號： | AK4665AEN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 20-Bit Stereo CODEC with MIC/HP-AMP |
| 中文描述： | 20位立體聲編解碼器麥克風(fēng)/惠普腺苷 |
| 文件頁數(shù)： | 50/52頁 |
| 文件大?。?/td> | 541K |
| 代理商： | AK4665AEN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁當(dāng)前第50頁第51頁第52頁
ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 50 -
1.
Grounding and Power Supply Decoupling
The AK4665A requires careful attention to power supply and grounding arrangements. AVDD is usually supplied from
the analog power supply in the system and DVDD&TVDD is supplied from AVDD via a 10
resistor. Alternatively if
AVDD, DVDD, TVDD and HVDD are supplied separately, the power up sequence is not critical. AVSS, DVSS and
HVSS must 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 close to
the AK4665A as possible, with the small value ceramic capacitors being the nearest.
2. Internal Voltage Reference
Internal voltage reference is output on the VREF pin (typ. 2.1V). An electrolytic capacitor 4.7
μ
F in parallel with a 0.1
μ
F
ceramic capacitor is attached between VREF and AVSS to eliminate the effects of high frequency noise. VCOM is
1.2V(typ) and 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 connected between VCOM and AVSS to eliminate the effects of high frequency noise. A ceramic capacitor
should be connected to VCOM pin and located as close as possible to the AK4665A. No load current may be drawn from
VREF and VCOM pins. All signals, especially clocks, should be kept away from the VCOM and VREF pins in order to
avoid unwanted coupling into the AK4665A.
3. Analog Inputs
The analog inputs are single-ended and the input resistance 60k
(typ) for AINL1/AINR1 pins and 60k
(typ)@0dB/
6dB or 30k
(typ)@+6dB/+30dB for MICIN pin. The input signal range is 1.5Vpp (typ) centered on
VCOM voltage. Usually, the input signal cuts DC with a capacitor. The cut-off frequency is fc=(1/2
π
RC). The AK4665A
can accept input voltages from AVSS to AVDD. The ADC output data format is 2’s complement. The ADC’s DC offset
is removed by the internal HPF (fc=3.4Hz@fs=44.1kHz).
4. Analog Outputs
The analog outputs are single-ended outputs. The output signal range of lineout is 1.5Vpp(typ) centered on the VCOM
voltage. The output signal range of headphone is 1.5Vpp(typ)@HPG bit = “0” or 2.83Vpp(typ)@HPG bit = “1” centered
on AVSS voltage. The input data format is 2’s compliment. The output voltage is a positive full scale for
7FFFFH(@20bit) and negative full scale for 80000H(@20bit). The ideal output is VCOM voltage (lineout) or AVSS
voltage (headphone) for 00000H(@20bit).
DC offsets on the lineout outputs is eliminated by AC coupling since the lineout outputs have a DC offset equal to VCOM
plus a few mV.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4671 | Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671EG | Stereo CODEC with MIC/RCV/HP-AMP |
| AK4673 | Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
| AK4673EG | Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
| AK4682 | Multi-channel CODEC with 2Vrms Stereo Selector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4666VQ | 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1,000 |
| AK4671 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671_10 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4671EG | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4673 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。