參數(shù)資料
型號： 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)： 37/76頁
文件大?。?/td> 634K
代理商： AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 37 -
The cut-off frequency of Headphone-amp output depends on the external resistor and capacitor used. Table 21 shows the
cut off frequency and the output power for various resistor/capacitor combinations. The headphone impedance R
L
is 16
.
Output powers are shown at HVDD = 2.7, 3.0 and 3.3V. The output voltage of headphone is 0.6 x AVDD (Vpp).
When an external resistor R is smaller than 12
, put an oscillation prevention circuit (0.22
μ
F
±
20% capacitor and
10
±
20% resistor) because it has the possibility that Headphone-amp oscillates.
AK4640
HP-AMP
16
Headphone
10
+/- 20%
0.22
μ
+/- 20%
R
C
Figure 26. External Circuit Example of Headphone
Output Power [mW]
3.0V
12.4
6.0
12.4
6.0
R [
]
C [
μ
F]
fc [Hz]
BOOST=OFF
152.5
105.8
71.2
49.7
Table 21. External Circuit Example
fc [Hz]
BOOST=MID
63
43
27
20
2.7V
10.0
4.8
10.0
4.8
3.3V
15.0
7.2
15.0
7.2
6.2
16
6.2
16
47
47
100
100
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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