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WM8774IFT bảng dữ liệu(PDF) 6 Page - Wolfson Microelectronics plc

tên linh kiện WM8774IFT
Giải thích chi tiết về linh kiện  24 - bit, 192kHz 8 - Channel Input Stereo Codec
PDF  42 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
Trang chủ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8774IFT bảng dữ liệu(HTML) 6 Page - Wolfson Microelectronics plc

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WM8774
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PP Rev 1.0 June 2002
6
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital supply range
DVDD
2.7
3.6
V
Analogue supply range
AVDD
2.7
5.5
V
Ground
AGND, DGND
0
V
Difference DGND to AGND
-0.3
0
+0.3
V
Note: Digital supply DVDD must never be more than 0.3V greater than AVDD.
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25
oC, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (TTL Levels)
Input LOW level
VIL
0.8
V
Input HIGH level
VIH
2.0
V
Output LOW
VOL
I
OL=1mA
0.1 x DVDD
V
Output HIGH
VOH
I
OH-1mA
0.9 x DVDD
V
Analogue Reference Levels
Reference voltage
VVMID
AVDD/2 –
50mV
AVDD/2
AVDD/2 +
50mV
V
Potential divider resistance
RVMID
AVDD to VMID and
VMID to AGND
40k
50k
60k
Ohms
DAC Performance (Load = 10k ohms, 50pF)
0dBFs Full scale output voltage
1.0 x
AVDD/5
Vrms
SNR (Note 1,2)
A-weighted,
@ fs = 48kHz
104
106
dB
SNR (Note 1,2)
A-weighted
@ fs = 96kHz
106
dB
Dynamic Range (Note 2)
DNR
A-weighted, -60dB
full scale input
104
106
dB
Total Harmonic Distortion (THD)
1kHz, 0dBFs
-97
-90
dB
DAC channel separation
100
dB
DAC analogue Volume Gain
Step Size
0.5
1
1.5
dB
DAC analogue Volume Gain
Range
1kHz Input
-100
0
dB
DAC analogue Volume Mute
Attenuation
1kHz Input, 0dB gain
100
dB
1kHz 100mVpp
50
dB
Power Supply Rejection Ratio
PSRR
20Hz to 20kHz
100mVpp
45
dB
ADC Performance
Input Signal Level (0dB)
1.0 x
AVDD/5
Vrms
SNR (Note 1,2)
A-weighted, 0dB gain
@ fs = 48kHz
93
102
dB
SNR (Note 1,2)
A-weighted, 0dB gain
@ fs = 96kHz
98
dB
Dynamic Range (note 2)
A-weighted, -60dB
full scale input
102
dB
kHz, 0dBFs
-90
-80
DB
Total Harmonic Distortion (THD)
1kHz, -3dBFs
-95
-85
dB



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