參數(shù)資料
型號: AK4370VN
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: 24-Bit 2ch DAC with HP-AMP & Output Mixer
中文描述: 24位2通道DAC,具有惠普腺苷
文件頁數(shù): 29/49頁
文件大?。?/td> 695K
代理商: AK4370VN
ASAHI KASEI
[AK4370]
MS0595-E-00
2007/03
- 29 -
< Analog Mixing Circuit of Full-differential Mono input >
When LDIF=LIN1L=RIN1R bits = “1”, LIN1 and RIN1 pins becomes IN+ and IN
pins, respectively. IN+ and IN
pins
can be used as full-differential mono line input for analog mixing of LOUT/ROUT pins. It is not available to mix with
other signal source for LOUT/ROUT outputs.
If the path is OFF and the signal is input to the input pin, the input pin should be biased to a voltage equivalent to VCOM
voltage (= 0.475 x AVDD) externally. Figure 39 shows the external bias circuit example.
+
LOUT pin
IN
pin
R
L
100k(typ)
R
1L
LIN1L bit
LDIF bit
+
100k(typ)
R
L
+
ROUT pin
R
L
R
L
IN+ pin
R
1L
RIN1R bit
+
100k(typ)
HPL/R pins
LDIFH bit
Figure 21
Figure 23. Summation circuit for stereo line output (Full-differential input, LOG bit = “0”)
Stereo Line Output (LOUT/ROUT pins) Volume
LOUT/ROUT volume is controlled by ATTS3-0 bits when LMUTE bit = “0” (+6dB
24dB or 0dB
30dB, 2dB step,
Table 16). Pop noise occurs when ATTS3-0 bits are changed.
LOG bit = “1”
(DAC Only)
FH
+6dB
EH
+4dB
DH
+2dB
CH
0dB
:
:
1H
22dB
0H
24dB
1
x
MUTE
Table 16. LOUT/ROUT Volume ATT values (x: Don’t care)
LMUTE
ATTS3-0
LOG bit = “0”
0dB
2dB
4dB
6dB
:
:
28dB
30dB
MUTE
Default
:
:
0
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