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參數資料
| 型號： | AK4371 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | DAC with built-in PLL & HP-AMP |
| 中文描述： | DAC，帶有內置的鎖相環(huán) |
| 文件頁數： | 32/62頁 |
| 文件大?。?/td> | 842K |
| 代理商： | AK4371 |
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[AK4371]
MS0596-E-00
2007/04
- 32 -
< External Circuit of Headphone-Amp >
The cut-off frequency of the headphone-amp output depends on the external resistor and capacitor used. Table 23 shows
the cut off frequency and the output power for various resistor/capacitor combinations. The headphone impedance R
L
is
16
Ω
. Output powers are shown at AVDD = 2.4, 3.0 and 3.3V. The output voltage of the headphone-amp is 0.48 x AVDD
(Vpp) @
3dBFS.
AK4371
HP-AMP
16
Ω
Headphone
R
C
Figure 23. External Circuit Example of Headphone
Output Power [mW]
R [
Ω
]
C [
μ
F]
fc [Hz]
BOOST=OFF
fc [Hz]
BOOST=MIN
2.4V
3.0V
3.3V
220
100
100
47
100
47
45
100
70
149
50
106
17
43
28
78
19
47
0
21
33
40
6.8
10
16
20
16
5
8
10
Table 23. Relationship of external circuit, output power and frequency response (PMVREF bit = “0”)
< Wired OR with External Headphone-Amp >
When PMVCM=PMHPL=PMHPR bits = “0” and HPZ bit = “1”, Headphone-amp is powered-down and HPL/R pins are
pulled-down to VSS1 by 200k
Ω
(typ). In this setting, it is available to connect headphone-amp of AK4371 and external
single supply headphone-amp by “wired OR”.
PMVCM
PMHPL/R
HPMTN
HPZ
x
0
x
0
Power-down & Mute
0
0
x
1
1
1
0
x
1
1
1
x
Table 24. HP-Amp Mode Setting (x: Don’t care)
Mode
HPL/R pins
VSS1
Pull-down by 200k
Ω
VSS1
Normal Operation
(default)
Power-down
Mute
Normal Operation
HPL pin
HPR pin
Headphone
AK4371
Another
HP-Amp
Figure 24. Wired OR with External HP-Amp
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相關代理商/技術參數 |
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| AK4371VN | 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP |
| AK4372 | 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP |
| AK4372ECB | 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP |
| AK4372VCB | 制造商:AKM 制造商全稱:AKM 功能描述:DAC with built-in PLL & HP-AMP |
| AK4373 | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power Stereo DAC with HP/SPK-Amp |
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