參數(shù)資料
型號: AK4648EC
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP/SPK-AMP
中文描述: 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 69/119頁
文件大小: 1272K
代理商: AK4648EC
[AK4648]
MS0625-E-01
2007/06
- 69 -
Headphone-Amp
Power supply voltage for the Headphone-Amp is supplied from the HVDD pin and centered on the HVDD/2 voltage at
VBAT bit = “0”. The load resistance is 16
Ω
(min.). HPG3-0 bits select the output voltage (Table 58).
When HPM bit = “1”, DAC output signal is output to HPL and HPR pins as (L+R)/2 mono signal.
When HPM3 bit = “1”, the signal selected by MICL3 and MICR3 bits (LIN3/RIN3 inputs or MIC-Amp outputs) to HPL
and HPR pins as (L+R)/2 mono signal.
HPG3-0 bits
FH-DH
CH
BH
AH
9H
8H
7H
6H
5H
4H
3H
2H
1H
0H
Table 58. Headphone-Amp volume setting (N/A: Not available)
<Connection with Headphone>
The AK4648 can be connected with the headphone as follows.
1. Single-ended Mode (In case of not using common buffer for Headphone-Amp)
Volume [dB]
N/A
+3dB
0dB
-3dB
-6dB
-9dB
-12dB
-15dB
-18dB
-21dB
-24dB
-27dB
-30dB
-33dB
(default)
HPL pin
HP-Amp
16
Ω
R
0.22
μ
F
10
Ω
HVCM pin
VCOM Amp for
HP-Amp
Headphone
HPR pin
HP-Amp
R
0.22
μ
F
10
Ω
16
Ω
C
C
Figure 51. External circuit example of HP-Amp (Single-ended Mode)
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