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參數(shù)資料
| 型號： | AK4632 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP |
| 中文描述： | 16位ツヒALC的單聲道編解碼器 |
| 文件頁數(shù)： | 36/70頁 |
| 文件大?。?/td> | 639K |
| 代理商： | AK4632 |
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ASAHI KASEI
[AK4632]
MS0396-E-00
2005/06
- 36 -
Speaker Output
The power supply voltage for Speaker-Amp SVDD can be set to from 2.6V to 5.25V. However, SVDD should be set to
from 2.6V to 3.6V, when the load resistance is less than 50
(ex. a dynamic speaker).
The output signal from DAC is input to the Speaker-amp via the ALC2 circuit. This Speaker-amp is a mono output
controlled by BTL and a gain of the Speaker-Amp is set by SPKG1-0 bit. In the case of ALC2 OFF, the output voltage
depends on AVDD and SPKG1-0 bits. In the case of ALC2 ON, the output voltage depends on SVDD and SPKG1-0 bits.
The output level of ALC2 is proportional to SVDD.
SPKG1-0 bits
00
01
10
11
(Note) These Gain from the level at SPKG1-0bits=
“
00
”
.
Table 19. Gain of Speaker-Amp at ALC2 OFF
SPKG1-0 bits
AVDD
SVDD
at ALC2 OFF and DAC Input=0dBFS
00
3.3V
3.3V
3.27Vpp, 167mW@8
01
3.3V
3.3V
4.15Vpp, 269mW@8
10
3.3V
3.3V
6.91Vpp (Note)
11
3.3V
3.3V
8.50Vpp (Note)
00
3.3V
5.0V
01
3.3V
5.0V
10
3.3V
5.0V
11
3.3V
5.0V
(Note) This output voltage is assumed that the signal is not clipped. In actual, the signal will be clipped when DAC
outputs 0dBFS signal. The output power is 400mW@8
, SVDD=3.3V.
Table 20. Speaker-Amp Output Voltage
[Caution for using Piezo Speaker]
When a piezo speaker (load capacitance > 30pF) is used, resistances more than 10
should be inserted between SPP/SPN
pins and speaker in series, respectively, as shown in Figure 35. Zener diodes should be inserted between speaker and
GND as shown in Figure 35, in order to protect SPK-Amp of AK4632 from the power that the piezo speaker outputs
when the speaker is pressured. Zener diodes of the following Zener voltage should be used.
92% of SVDD
≤
Zener voltage of Zener diodo(ZD of Figure 35)
≤
SVDD+0.3V
Ex) In case of SVDD = 5.0V : 4.6V
≤
ZD
≤
5.3V
For example, Zener diode which Zener voltage is 5.1V(Min :4.97V, Max 5.24V) can be used.
Gain
0dB
+2.04dB
+6.22dB
+8.26dB
Output Voltage from Speaker-Amp
Output Voltage from
Speaker-Amp at ALC ON
3.09Vpp, 150mW@8
3.92Vpp, 240mW@8
Not Available
Not Available
Not Available
Not Available
6.34Vpp
8.02Vpp
3.27Vpp
4.15Vpp
6.91Vpp
8.50Vpp
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4632VN | 16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP |
| AK4633VN | 16bit mono CODEC with MIC/SPK amplifier. |
| AK4633 | 16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
| AK4640 | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
| AK4640VG | 16BIT CODEC WITH MIC /HP/SPK-AMPl |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4632VN | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ツヒ Mono CODEC with ALC & MIC/SPK/Video-AMP |
| AK4633 | 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit Mono CODEC with ALC & MIC/SPK-AMP |
| AK4633ENP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A |
| AK4633VN | 制造商:AKM 制造商全稱:AKM 功能描述:16bit mono CODEC with MIC/SPK amplifier. |
| AK4633VNP-L | 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:LOW COST MONO CODEC WITH SPK A |
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