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WM8522 参数 Datasheet PDF下载

WM8522图片预览
型号: WM8522
PDF下载: 下载PDF文件 查看货源
内容描述: 音频D / A C航标GBF [AUDIO D/A C HANGBIAO GBF]
分类和应用:
文件页数/大小: 39 页 / 393 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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WM8522  
Production Data  
RECOMMENDED OPERATING CONDITIONS  
PARAMETER  
SYMBOL  
DVDD  
TEST CONDITIONS  
MIN  
2.7  
TYP  
MAX  
3.6  
UNIT  
Digital supply range  
Analogue supply range  
Ground  
V
V
V
V
AVDD, VREFP  
AGND, VREFN, DGND  
4.5  
5.5  
0
0
Difference DGND to AGND  
-0.3  
+0.3  
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD for normal operation of the device.  
ELECTRICAL CHARACTERISTICS  
Test Conditions  
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs.  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
Digital Logic Levels (CMOS Levels)  
Input LOW level  
VIL  
VIH  
0.3 x DVDD  
0.1 x DVDD  
V
V
V
V
Input HIGH level  
0.7 x DVDD  
0.9 x DVDD  
Output LOW  
VOL  
VOH  
I
OL=1mA  
Output HIGH  
IOH= -1mA  
Analogue Reference Levels  
Reference Voltage  
VVMID  
RVMID  
VREFP/2  
50  
V
Potential Divider Resistance  
(VREFP to VMID) and  
(VMID to VREFN)  
kΩ  
DAC Performance (Load = 10k, 50pF)  
0dBFs Full Scale Output  
Voltage  
1.6 x  
VREFP/5  
95  
1.7 x  
VREFP/5  
102  
1.8 x  
Vrms  
dB  
VREFP/5  
SNR (Note 1,2,4)  
SNR (Note 1,2,4)  
SNR (Note 1,2,4)  
A-weighted,  
@ fs = 48kHz  
A-weighted  
101  
101  
102  
dB  
@ fs = 96kHz  
A-weighted  
dB  
@ fs = 192kHz  
Dynamic Range (Note 2,4)  
DNR  
A-weighted, -60dB full  
scale input  
95  
dB  
Total Harmonic Distortion (THD)  
Mute Attenuation  
1kHz, 0dBFs  
-85  
100  
100  
50  
-78  
dB  
dB  
dB  
dB  
dB  
1kHz Input, 0dB gain  
DAC Channel Separation  
Power Supply Rejection Ratio  
PSRR  
1kHz 100mVpp  
20Hz to 20kHz  
100mVp-p  
45  
Supply Current  
Analogue Supply Current  
Digital Supply Current  
AVDD, VREFP = 5V  
DVDD = 3.3V  
12  
10  
mA  
mA  
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).  
PD Rev 4.0 July 2006  
6
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