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WM8770SIFV 参数 Datasheet PDF下载

WM8770SIFV图片预览
型号: WM8770SIFV
PDF下载: 下载PDF文件 查看货源
内容描述: 24位, 192kHz的8声道编解码器,带有音量控制 [24-bit, 192kHz 8-Channel Codec with Volume Control]
分类和应用: 解码器编解码器
文件页数/大小: 52 页 / 555 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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WM8770  
Production Data  
Test Conditions  
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs, ADC/DAC in Slave Mode unless  
otherwise stated.  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
Analogue input (AIN) to Analogue output (VOUT) (Load=10k, 50pF, gain = 0dB) Bypass Mode  
0dB Full scale output voltage  
1.0 x  
AVDD/5  
104  
Vrms  
SNR (Note 1)  
THD  
dB  
dB  
dB  
dB  
dB  
1kHz, 0dB  
1kHz, -3dB  
-90  
-95  
Power Supply Rejection Ratio  
PSRR  
1kHz 100mVpp  
50  
20Hz to 20kHz  
100mVpp  
45  
Mute Attenuation  
1kHz, 0dB  
100  
dB  
Supply Current  
Analogue supply current  
Digital supply current  
AVDD = 5V  
120  
16  
mA  
mA  
DVDD = 3.3V  
Notes:  
1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’  
weighted.  
2. 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.  
3. 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) - DNR 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. Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band).  
5. 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.  
6. Pass-Band Ripple - Any variation of the frequency response in the pass-band region.  
PD Rev 4.1 June 2005  
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