參數(shù)資料
型號(hào)： AK4561
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi)： Codec
英文描述： 16bit CODEC with built-in ALC and MIC/HP-Amp
中文描述： 16位編解碼器在ALC和內(nèi)置麥克風(fēng)/惠普放大器
文件頁(yè)數(shù)： 37/48頁(yè)
文件大?。?/td> 332K
代理商： AK4561
ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Rev. 0.9
2000/09
- 37 -
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Digital Delay Circuit
When DLYE bit is “1”, digital data (L1 and R1) of ADC can be delayed to a maximum 90tap (DLY6-0 bits) by a
resolution of 1/64fs (=3
μ
s@fs=48kHz). The coefficient value subtracted from the opposite channel is set by COE3-0 bit.
When DLYE bit is “0”, the digital delay circuit is powered-down.
L2 = L1 – (ATT x (Delay x R1))
R2 = R1 – (ATT x (Delay x L1))
Figure 25. Digital Delay Circuit
DLYE, DLY6-0 and COE3-0 bits should be changed after ADC is powered-down. During the ADC is normal operation,
pop noise may occur by changing these bits. The following sentences are an example of changing these bits.
1. Powered-down ADC (PM2 bit = “0”)
2. Change DLYE, DLY6-0, COE3-0 bit
3. The power-down of ADC is released (PM2 bit = “1”)
Then ADC starts initialization cycle.
n
Comparator Output
The input DC voltage form VTH pin is compared with analog output from HPF-Amp. COMP pin goes “H” when either
Lch or Rch of analog output exceeds threshold level, if it does not exceed the threshold level, COMP pin goes “L”.
This threshold level can be set by the input DC voltage from VTH pin. VTH pin should be supplied to DC voltage
(threshold of negative) divided by a resistor between MIC_B pin and MVSS pin. VTH pin can be supplied until minimum
(MVCM – MVDD x 0.35). For example, the input voltage of VTH pin is 0.4V when MVDD is 2.8V. The threshold of
positive side is converted by internal inverting amplifier.
Delay
Delay
L1
L2
R1
R2
ATT
ATT
COE3-0 bit
DLY6-0bit
相關(guān)PDF資料
PDF描述
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
AK4563A Low Power 16bit 4ch ADC & 2ch DAC with ALC
AK4563AVF Low Power 16bit 4ch ADC & 2ch DAC with ALC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4561VQ 制造商:AKM 制造商全稱(chēng):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(chēng):AKM 功能描述:EVALUATION BOARD REV.A FOR AK4562
AK4562VN 制造商:AKM 制造商全稱(chēng):AKM 功能描述:LOW POWER 20BIT CODEC WITH PGA
AK4563A 制造商:AKM 制造商全稱(chēng):AKM 功能描述:Low Power 16bit 4ch ADC & 2ch DAC with ALC
AK4563AVF 制造商:AKM 制造商全稱(chēng):AKM 功能描述:Low Power 16bit 4ch ADC & 2ch DAC with ALC
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