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參數(shù)資料
| 型號： | AK4665AEN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 20-Bit Stereo CODEC with MIC/HP-AMP |
| 中文描述： | 20位立體聲編解碼器麥克風(fēng)/惠普腺苷 |
| 文件頁數(shù)： | 32/52頁 |
| 文件大?。?/td> | 541K |
| 代理商： | AK4665AEN |
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ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 32 -
Headphone Output (HPL/HPR pins)
Power supply voltage for headphone amplifiers is applied from HVDD pin for the positive supply and the negative supply
generated by the internal charge pump circuit. The headphone amplifier is single-ended outputs and centered on 0V
(AVSS). Therefore, the capacitor for AC-coupling can be removed. The minimum load resistance is 16
. HPG bit set the
output voltage (Table 33).
HPG bit
Output Voltage
0
1.5Vpp@0dBFS
1
2.0Vpp@
3dBFS
Table 33. Headphone Output Voltage / Power
The headphone output is enabled when HPMTN bit is “1” and muted when HPMTN bit is “0”. The mute ON/OFF time
are set by PTS1-0 bits (Table 39) when MOFF8 bit is “0”. When MOFF8 bit is “1”, the ON/OFF is done immediately.
When PMHPL and PMHPR bits are “0”, the headphone amplifiers are powered-down completely. At that time, the HPL
and HPR pins are AVSS voltage. The power-up/down time are set by PUT1-0 bits (Table 38) when MOFF0 bit is “0”.
When MOFF0 bit is “1”, the power up/down is done immediately.
PMHPL/R bits
HPMTN bit
0
x
0
1
1
Table 34. Headphone output states
The ON/OFF of each path is set by DACHL, LINHL, MINHL, DACHR, RINHR and MINHR bits. The summation gain
of each path is 0dB (typ) at HPG bit = “0” and +5.5dB (typ) at HPG bit = “1”.
Output Power
17mW@16
31mW@16
Default
HP-Amp
Power-down
Power-up & Mute
Power-up & Output
Default
HPL/HPR pin
LIN/RIN pin
MIN pin
LINHL/RINHR bit
MINHL/MINHR bit
DACHL/DACHR bit
DACL/DACR
Figure 20. The Summation Circuit of Headphone Output
(L+R)/2 signal of DAC is output from HPL and HPR pins when HPM bit is “1”.
DACHL
0
1
HPM bit
x
0
1
HPL pin
Path OFF
L
(L+R)/2
Default
Table 35. Headphone Output Mode (Lch)
DACHR
0
1
HPM bit
x
0
1
HPR pin
Path OFF
R
(L+R)/2
Default
Table 36. Headphone Output Mode (Rch)
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相關(guān)代理商/技術(shù)參數(shù) |
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| AK4666VQ | 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標(biāo)準(zhǔn)包裝:1,000 |
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| AK4671EG | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP-AMP |
| AK4673 | 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP and Touch Screen Controller |
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