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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/惠普/胰腎聯(lián)合移植，放大器 |
| 文件頁數(shù)： | 29/47頁 |
| 文件大小： | 339K |
| 代理商： | AK4560A |
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ASAHI KASEI
[AK4560A]
MS0028-E-00
2000/05
- 29 -
1. Pre- Amp
Pre-Amp is non-inverting amplifier and internally biased to MVCM voltage with 100k
(typ.). Gain value of Pre-Amp is
adjusted by external resistor.
Gain (1+Rf/Ri) of Pre-Amp should use a range of +18
～
30dB.
An external capacitor needs to cancel DC gain. Cut-off frequency is decided by a external input resistor (Ri) and a
capacitor (C).
Figure 14. Pre-Amp
2. EQ-Amp
EQ-Amp is block to emphasize a stereo feeling at using Internal MIC Mode.
EQ-Amp can be emphasized by adding the output signal from pre-amplifier and the reverse channel differentially. When
External MIC Mode is selected, EQ-Amp does not connect.
3. HPF-Amp
To cancel wind-noise, AK4560A has the HPF-Amp which is non-inverting amplifier, 2
nd
order high pass filter and gain of
0dB. The HPF-Amp can be ON/OFF by controlling the internal registers. In case of OFF, HPF-Amp becomes a unity gain
buffer. This HPF-Amp can use when Internal MIC Mode is selected. In case of External MIC Mode, the control of
HPF-Amp is invalid and becomes a unity gain buffer.
4. Power Supply for MIC
Power Supply for microphone is supplied from MPWR pin. Output voltage is MVDD – 1.4V (typ) . For example, MPWR
pin outputs 2.5V at MVDD = 3.9V. And MPWR pin can supply the current until 3mA.
When MIC bit is “0”, the power supply current can be stopped.
INT_MIC_L
EXT_MIC_L
+
-
Pre Amp
60
59
62
63
C
Ri
Rf
相關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 |
相關代理商/技術參數(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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