- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385092 > AK4538 (Asahi Kasei Microsystems Co.,Ltd) 16Bit DS CODEC with MIC/HP/SPK-AMP PDF資料下載
參數(shù)資料
| 型號： | AK4538 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16Bit DS CODEC with MIC/HP/SPK-AMP |
| 中文描述： | 16位副編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷 |
| 文件頁數(shù)： | 30/70頁 |
| 文件大?。?/td> | 485K |
| 代理商： | AK4538 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁當(dāng)前第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁
ASAHI KASEI
[AK4538]
MS0198-E-01
2003/5
- 30 -
n
Digital Attenuator
The AK4538 has a channel-independent digital attenuator (256 levels, 0.5dB step, Mute). The attenuation level of each
channel can be set by the ATTL/R7-0 bits (Table 21). When the DATTC bit = “1”, the ATTL7-0 bits control both Lch and
Rch attenuation levels. When the DATTC bit = “0”, the ATTL7-0 bits control Lch level and ATTR7-0 bits control Rch
level. This attenuator has a soft transition function. It takes 1061/fs from 00H to FFH.
ATTL/R7-0
Attenuation
00H
01H
0.5dB
02H
1.0dB
03H
1.5dB
:
:
FDH
126.5dB
FEH
127.0dB
FFH
MUTE (
∞
)
Table 21. DATT Code Table
n
Soft Mute
Soft mute operation is performed in the digital domain. When the SMUTE bit goes to a “1”, the output signal is attenuated
by -
∞
(“0”) during the cycle set by the TM1-0 bits. When the SMUTE bit is returned to “0”, the mute is cancelled and the
output attenuation gradually changes to 0dB during the cycle set of the TM1-0 bits. If the soft mute is cancelled within the
cycle set by the TM1-0 bits after starting the operation, the attenuation is discontinued and returned to 0dB. The soft mute
is effective for changing the signal source without stopping the signal transmission.
The soft mute function is independent of output volume and cascade connected between both functions.
Default
0dB
:
:
SMUTE bit
Attenuation
TM1-0 bit
(1)
0dB
-
∞
TM1-0 bit
GD
(2)
GD
(3)
Analog Output
Figure 23. Soft Mute Function
NOTE:
(1) The output signal is attenuated until -
∞
(“0”) by the cycle set by the TM1-0 bits.
(2) Analog output corresponding to digital input has the group delay (GD).
(3) If the soft mute is cancelled within the cycle of setting the TM1-0 bits, the attenuation is discounted and returned to
0dB(the set value).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4538VN | 16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4541VQ | AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4541 | AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4543 | AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4543VQ | AC’97 Rev 2.1 Multimedia Audio CODEC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4538VN | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4541 | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4541VQ | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4543 | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4543VQ | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。