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參數(shù)資料
| 型號(hào)： | AK4640 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| 中文描述： | 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植，AMPl |
| 文件頁數(shù)： | 38/76頁 |
| 文件大?。?/td> | 634K |
| 代理商： | AK4640 |
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ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 38 -
Speaker Output
The output signal from analog volume is converted into a mono signal [(L+R)/2] and this signal is input to the
Speaker-amp via the ALC2 circuit. This Speaker-amp is a mono output controlled by BTL and can output a maximum of
300mW@ALC2=OFF and 250mW@ALC2=ON at 8
load when HVDD = 3.3V.
ALC2
Po(max)
0
300mW
1
250mW
Table 22. SPK-Amp Maximum Output Power
Speaker blocks (MOUT2, ALC2 and Speaker-amp) can be powered up/down by controlling the PMSPK bit. When the
PMSPK bit is “0”, the MOUT2, SPP and SPN pins are placed in a Hi-Z state.
When the SPPS bit is “0”, the Speaker-amp enters power-save-mode. In this mode, the SPP pin is placed in a Hi-Z state
and the SPN pin goes to HVDD/2 voltage. And then the Speaker output gradually changes to the HVDD/2 voltage and
this mode can reduce click noise at power-up. When the AK4640 is powered down, click noise can be also reduced by
first entering power-save-mode.
Default
PMSPK bit
SPPS bit
SPP pin
SPN pin
HVDD/2
HVDD/2
Hi-Z
Hi-Z
Hi-Z
Hi-Z
>1ms
>0
Figure 27. Power-up/Power-down Timing for Speaker-amp
Mono Output (MOUT2 pin)
The mixed Lch/Rch signal of DAC is output from the MOUT2 pin. When the MOUT2 bit is “0”, this output is OFF and
the MOUT2 pin is forced to VCOM voltage. The load impedance is 10k
(min.). When the PMSPK bit is “0”, the
Speaker-amp enters power-down-mode and the output is placed in a Hi-Z state.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4640VG | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4640VN | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4642EN | Stereo CODEC with MIC/HP/SPK-AMP |
| AK4643EN | Stereo CODEC with MIC/HP/RCV/SPK-AMP |
| AK4645EZ | Stereo CODEC with MIC/HP-AMP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4640_05 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ CODEC with MIC/HP/SPK-AMP |
| AK4640VG | 制造商:AKM 制造商全稱:AKM 功能描述:16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4640VN | 制造商:AKM 制造商全稱:AKM 功能描述:16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4641 | 制造商:AKM 制造商全稱:AKM 功能描述:16 BIT CODEC WITH BLUETOOTH INTERFACE |
| AK4641EN | 制造商:AKM 制造商全稱:AKM 功能描述:16bit stereo CODEC with built-in Microphone-amplifier and 16bit Mono CODEC for Bluetooth Interface. |
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