參數(shù)資料
型號(hào)： AK4365VN
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(nèi)置的鎖相環(huán)
文件頁數(shù)： 23/38頁
文件大?。?/td> 410K
代理商： AK4365VN
ASAHI KASEI
[AK4365]
MS0110-E-01
2003/10
- 23 -
Addr
89H
8BH
8DH
Register Name
HP-Amp Rch ATT
HP-Amp Lch ATT
MOUT ATT
Default
D7
D6
D5
D4
D3
D2
D1
D0
ATTR7 ATTR6 ATTR5 ATTR4 ATTR3 ATTR2 ATTR1 ATTR0
ATTL7
ATTL6
ATTL5
ATTL4
ATTM7
ATTM6
ATTM5
ATTM4
0
0
0
0
ATTL3
ATTM3
0
ATTL2
ATTM2
0
ATTL1
ATTM1
0
ATTL0
ATTM0
0
ATTR7-0: Setting of the attenuation value of output signal from DACR
ATTL7-0: Setting of the attenuation value of output signal from DACL
ATTM7-0: Setting of the attenuation value of output signal from DACM.
The internal calculation is attenuated by 10bit linear value, but the available ATT value is 8bit. Table 17 shows
typical ATT values. The transition between ATT values uses the same mechanism as the soft mute operation. For
example, if the current value is ATT1 and a new value is set as ATT2, ATT1 transitions to ATT2. The time that it
takes for this transition to occur is set via the TM1-0 bits. If the new value (ATT3) is set before ATT1 reaches ATT2,
the ATT value will transition directly to the ATT3 setting.
Equation of attenuation level:
FFH:
0dB
FEH
～
20H: ATT = 20 x log
10
((Register Value x 4) – 60H) / 1023) [dB]
1FH
～
01H: ATT = 20 x log
10
((Register Value) / 1023) [dB]
00H:
MUTE
DATA
ATT [dB]
DATA
FFH
0.0
25H
FCH
-0.998
23H
E3H
-2.006
22H
CDH
-3.003
21H
B9H
-4.020
20H
A8H
-4.989
1DH
98H
-6.012
1AH
8AH
-7.018
16H
7EH
-7.984
14H
73H
-8.975
12H
69H
-9.987
10H
60H
-11.010
0EH
58H
-12.033
0DH
51H
-13.039
0BH
4BH
-14.005
0AH
45H
-15.092
09H
41H
-15.901
08H
3CH
-17.030
07H
38H
-18.053
06H
35H
-18.908
05H
31H
-20.198
04H
2FH
-20.922
03H
2CH
-22.136
02H
2AH
-23.051
01H
28H
-24.074
00H
26H
-25.234
Table 17. Typical ATT values
ATT [dB]
-25.877
-27.328
-28.156
-29.017
-30.095
-30.950
-31.898
-32.963
-34.177
-35.092
-36.115
-37.275
-37.919
-39.370
-40.198
-41.113
-42.136
-43.296
-44.634
-46.218
-48.156
-50.655
-54.177
-60.198
MUTE
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PDF描述
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