- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372956 > XWM8731EDS (Wolfson Microelectronics) Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates PDF資料下載
參數(shù)資料
| 型號： | XWM8731EDS |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | Codec |
| 英文描述： | Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates |
| 中文描述： | 便攜式互聯(lián)網(wǎng)三極管編解碼器的耳機驅(qū)動器和可編程采樣率 |
| 文件頁數(shù)： | 40/56頁 |
| 文件大?。?/td> | 595K |
| 代理商： | XWM8731EDS |
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頁當前第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
WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
40
USB MODE SAMPLE RATES
In USB mode the MCLK/crystal oscillator input is 12MHz only.
SAMPLING
RATE
ADC
kHz
48
DAC
kHz
48
MCLK
FREQUENCY
SAMPLE
RATE
REGISTER SETTINGS
DIGITAL
FILTER
TYPE
MHz
12.000
BOSR
0
SR3
0
SR2
0
SR1
0
SR0
0
0
44.1
(Note 2)
48
44.1
(Note 2)
8
12.000
1
1
0
0
0
1
12.000
0
0
0
0
1
0
44.1
(Note 2)
8
8
(Note 1)
48
12.000
1
1
0
0
1
1
12.000
0
0
0
1
0
0
8
(Note 1)
8
44.1
(Note 2)
8
12.000
1
1
0
1
0
1
12.000
0
0
0
1
1
0
8
(Note 1)
32
8
(Note 1)
32
12.000
1
1
0
1
1
1
12.000
0
0
1
1
0
0
96
96
12.000
0
0
1
1
1
3
88.2
(Note 3)
Table 20 USB Mode Sample Rate Look-up Table
88.2
(Note 3)
12.000
1
1
1
1
1
2
Notes:
1.
2.
3.
4.
8k not exact, actual = 8.021kHz
44.1k not exact, actual = 44.118kHz
88.1k not exact, actual = 88.235kHz
All other combinations of BOSR and SR[3:0] that are not in the truth table are invalid
The table above can be used to set up the device to work with various sample rate combinations. For
example if the user wishes to use the WM8731 in USB mode with the ADC and DAC sample rates at
48kHz and 48kHz respectively then the device should be programmed with BOSR = 0, SR3 = 0, SR2
= 0, SR1 = 0 and SR0 = 0. The ADC and DAC will then operate with a Digital Filter of type 0, refer to
Digital Filter Characteristics section for an explanation of the different filter types.
The BOSR bit represents the base over-sampling rate. This is the rate that the WM8731 digital signal
processing is carried out at and the sampling rate will always be a sub-multiple of this. In USB mode,
with BOSR = 0, the base over-sampling rate is defined at 250fs, with BOSR = 1, the base over-
sampling rate is defined at 272fs. This can be used to determine the actual audio sampling rate
produced by the ADC and required by the DAC.
Example scenarios are, :-
1.
with a requirement that the ADC data sampling rate is 8kHz and DAC data sampling rate is
48kHz the device is programmed with BOSR = 0 (250fs), SR3 = 0, SR2 = 0, SR1 = 1, SR0 =
0.The ADC will then be exactly 8kHz ( derived from 12MHz/250 x 1/6 ) and the DAC expects
data at exactly 48kHz ( derived from 12MHz/250 ).
2.
with a requirement that ADC data rate is 8kHz and DAC data rate is 44.1kHz the device is
programmed with BOSR = 0 (272fs), SR3 = 0, SR2 = 0, SR1 = 1, SR0 = 0. The ADC will not
output data at exactly 8kHz, instead it will be 8.021kHz ( derived from 12MHz/272 x 2/11 ) and
the DAC at 44.118kHz ( derived from 12MHz/272 ). A slight (sub 0.5%) pitch shift will therefore
results in the 8kHz and 44.1kHz audio data and (more importantly) the user must ensure that
the data across the digital interface is correctly synchronised at the 8.021kHz and 44.117kHz
rates.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XWM8733ED | Filament Replacement LED Lamp; Color:Warm White; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Voltage Rating:24V; Bulb Size:T-3 1/4; Forward Current:30mA; Forward Voltage:24V; LED Color:Warm White RoHS Compliant: No |
| XWM8740EDS | 24-bit, High Performance 192kHz Stereo DAC |
| XWM9708 | AC97 Revision 2.1 Audio Codec |
| XWM9708CDS | AC97 Revision 2.1 Audio Codec |
| XWT1205 | High Power Package Trim and Enable Pin |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XWM8733ED | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:102dB Stereo DAC |
| XWM8734EDS | 功能描述:接口—CODEC Stereo CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| XWM8734EDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo Audio CODEC |
| XWM8734EDS/RV | 功能描述:接口—CODEC Stereo CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| XWM8734EDS/V | 功能描述:接口—CODEC Stereo CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。