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參數(shù)資料
| 型號： | WM8951L |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | ADC |
| 英文描述： | STEREO ADC WITH MICROPHONE INPUT AND CLOCK GENERATOR |
| 中文描述： | 立體聲ADC，具有麥克風輸入和時鐘發(fā)生器 |
| 文件頁數(shù)： | 7/42頁 |
| 文件大?。?/td> | 499K |
| 代理商： | WM8951L |
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Production Data
WM8951
w
PD Rev 4.0 May 2005
7
Test Conditions
AVDD1, AVDD2, DBVDD = 3.3V, AGND1, AGND2 = 0V, DCVDD = 1.5V, DGND = 0V, T
A
= +25
o
C, Slave Mode, fs = 48kHz,
XTI/MCLK = 256fs unless otherwise stated.
Signal to Noise Ratio
(Note 1,3)
DCVDD=1.5V
A-weighted, 0dB gain
Dynamic Range (Note 3)
DR
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
A-weighted, -60dB full
scale input
Total Harmonic Distortion
THD
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
0dB input, 0dB gain
1kHz 100mVpp
Power Supply Rejection Ratio
PSRR
20Hz to 20kHz
100mVpp
Programmable Gain Boost
MICBOOST bit
set
Rsource < 50 Ohms
Mic Path gain (MICBOOST gain
is additional to this nominal
gain)
Mute attenuation
0dB, 1kHz input
Input Resistance
R
INMIC
Input Capacitance
C
INMIC
Microphone Bias
Bias Voltage
V
MICBIAS
SNR
AVDD1/2= DBVDD=1.8V
80
dB
70
dB
-55
dB
50
45
dB
dB
1kHz input
34
dB
MICBOOST = 0
Rsource < 50 Ohms
14
dB
80
10k
10
dB
pF
0.75*AVDD1
–100mV
0.75*AVDD1 0.75*AVDD1
+ 100mV
3
V
Bias Current Source
Output Noise Voltage
Notes:
I
MICBIAS
Vn
mA
nV/
√
Hz
1K to 20kHz
25
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.
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.
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.
VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
2.
3.
4.
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).
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).
THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
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.
2.
3.
4.
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相關代理商/技術參數(shù) |
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|---|---|
| WM8951L_07 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo ADC with Microphone Input and Clock Generator |
| WM8951LGEFL | 功能描述:音頻模/數(shù)轉換器 IC Stereo ADC with Mic Input & Clk Gen RoHS:否 制造商:Wolfson Microelectronics 轉換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風格: 封裝 / 箱體: 封裝: |
| WM8951LGEFL/R | 功能描述:音頻模/數(shù)轉換器 IC Stereo ADC with Mic Input & Clk Gen RoHS:否 制造商:Wolfson Microelectronics 轉換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風格: 封裝 / 箱體: 封裝: |
| WM8952 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Mono ADC with Microphone Pre-amplifier |
| WM8952ECS/RV | 功能描述:模數(shù)轉換器 - ADC Mono ADC with mic preamp RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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