參數(shù)資料
型號: WM8773
廠商: Wolfson Microelectronics
元件分類: ADC
英文描述: 24-bit, 96kHz ADC with 8 Channel I/P Multiplexer
中文描述: 24位,96kHz的ADC,具有8通道I /頁復(fù)用器
文件頁數(shù): 6/30頁
文件大小: 270K
代理商: WM8773
WM8773
Product Preview
PP Rev 1.0 June 2002
6
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Note:
Digital supply DVDD must never be more than 0.3V greater than AVDD.
SYMBOL
DVDD
AVDD
AGND, DGND
TEST CONDITIONS
MIN
2.7
2.7
-0.3
TYP
0
0
MAX
3.6
5.5
+0.3
UNIT
V
V
V
V
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, T
A
= +25
o
C, fs = 48kHz, MCLK = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Digital Logic Levels (TTL Levels)
Input LOW level
V
IL
Input HIGH level
V
IH
Output LOW
V
OL
I
OL
=1mA
Output HIGH
V
OH
I
OH
-1mA
Analogue Reference Levels
Reference voltage
V
VMID
MIN
TYP
MAX
UNIT
0.8
V
V
V
V
2.0
0.1 x DVDD
0.9 x DVDD
AVDD/2 –
50mV
40k
AVDD/2
AVDD/2 +
50mV
60k
V
Potential divider resistance
R
VMID
AVDD to VMIDADC
and VMIDADC to
AGND
50k
Ohms
ADC Performance
Input Signal Level (0dB)
1.0 x
AVDD/5
10
2
Vrms
SNR (Note 1,2)
A-weighted, 0dB gain
@ fs = 48kHz
A-weighted, 0dB gain
@ fs = 96kHz
A-weighted, -60dB
full scale input
kHz, 0dBFs
1kHz, -3dBFs
1kHz Input
93
dB
SNR (Note 1,2)
98
dB
Dynamic Range (note 2)
10
2
dB
-90
-95
90
1.0
97
50
45
-80
-85
1.5
+19
d
B
dB
dB
dB
dB
dB
dB
dB
Total Harmonic Distortion (THD)
ADC Channel Separation
Programmable Gain Step Size
Programmable Gain Range
Mute Attenuation
Power Supply Rejection Ratio
0.5
-12
1kHz Input
1kHz Input, 0dB gain
1kHz 100mVpp
20Hz to 20kHz
100mVpp
PSRR
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