參數(shù)資料
型號(hào)： XWM8731EDS
廠商： Wolfson Microelectronics
元件分類(lèi)： 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(jī)驅(qū)動(dòng)器和可編程采樣率
文件頁(yè)數(shù)： 10/56頁(yè)
文件大?。?/td> 595K
代理商： XWM8731EDS
WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
10
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, T
A
= +25
o
C, Slave Mode, fs = 48kHz, XTI/MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST
CONDITIONS
SNR (Note 3)
A-weighted
1kHz, R
L
= 32 ohms @
P
O
= 10mW rms
MIN
TYP
MAX
UNIT
90
97
dB
%
dB
%
dB
dB
dB
0.1
60
1.0
40
THD
1kHz, R
L
= 32 ohms @
P
O
= 20mW rms
Power Supply Rejection Ratio
PSSR
1kHz 100mVpp
20Hz to 20kHz
100mVpp
1kHz
50
45
Programmable Gain Maximum
Programmable Gain Minimum
Programmable Gain Step Size
Mute attenuation
Microphone Input to Headphone Output Side Tone Mode
0dB Full scale output voltage
6
-73
1
80
dB
1kHz
dB
dB
1kHz, 0dB
1.0 x
AVDD/3.3
95
50
45
Vrms
SNR (Note 1, 3)
Power Supply Rejection Ratio
90
dB
dB
dB
PSSR
1kHz 100mVpp
20Hz to 20kHz
100mVpp
1kHz
Programmable Attenuation
Maximum
Programmable Attenuation
Minimum
Programmable Attenuation Step
Size
Mute attenuation
15
6
dB
1kHz
3
dB
1kHz, 0dB
80
dB
Notes:
1.
Ratio of output level with 1kHz full scale input, to the output level with the input short circuited, measured
‘
A
’
weighted
over a 20Hz to 20kHz bandwidth using an Audio analyser.
2.
Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured
‘
A
’
weighted over a 20Hz to 20kHz bandwidth.
3.
All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use
such a filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in the Electrical
Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic
specification values.
4.
VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
TERMINOLOGY
1.
Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
2.
Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal.
Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB
to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).
3.
THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
4.
Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
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XWM8734EDS 功能描述:接口—CODEC Stereo CODEC RoHS:否 制造商:Texas Instruments 類(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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(fēng)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(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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(fēng)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(lèi)型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
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